src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/exceptions/TimeoutError.java

+package gov.anl.aps.dm.common.exceptions;
+
+import gov.anl.aps.dm.common.constants.DmStatus;
+
+/**
+ * Timeout error.
+ */
+public class TimeoutError extends DmException {
+
+    /**
+     * Default constructor.
+     */
+    public TimeoutError() {
+        super();
+    }
+
+    /**
+     * Constructor using error message.
+     *
+     * @param message error message
+     */
+    public TimeoutError(String message) {
+        super(message);
+    }
+
+    /**
+     * Constructor using throwable object.
+     *
+     * @param throwable throwable object
+     */
+    public TimeoutError(Throwable throwable) {
+        super(throwable);
+    }
+
+    /**
+     * Constructor using error message and throwable object.
+     *
+     * @param message error message
+     * @param throwable throwable object
+     */
+    public TimeoutError(String message, Throwable throwable) {
+        super(message, throwable);
+    }
+
+    @Override
+    public int getErrorCode() {
+        return DmStatus.DM_TIMEOUT_ERROR;
+    }    
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/objects/DmObject.java

+package gov.anl.aps.dm.common.objects;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import gov.anl.aps.dm.common.exceptions.DmException;
+import java.io.Serializable;
+
+/**
+ * Base DM object class.
+ */
+public class DmObject implements Serializable {
+
+    protected Long id = null;
+    protected String name = null;
+    protected String description = null;
+
+    public DmObject() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    /**
+     * Conversion to JSON string representation.
+     *
+     * @return JSON string
+     */
+    public String toJson() {
+        Gson gson = new GsonBuilder().create();
+        return gson.toJson(this);
+    }
+
+    /**
+     * Encode object.
+     *
+     * @throws DmException in case of any errors
+     */
+    public void encode() throws DmException {
+    }
+
+    /**
+     * Decode object.
+     *
+     * @throws DmException in case of any errors
+     */
+    public void decode() throws DmException {
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/objects/DmObjectFactory.java

+package gov.anl.aps.dm.common.objects;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+import gov.anl.aps.dm.common.exceptions.DmException;
+import java.lang.reflect.Type;
+import java.util.LinkedList;
+import java.util.List;
+import org.apache.log4j.Logger;
+
+/**
+ * DM object factory class.
+ */
+public class DmObjectFactory {
+
+    private static final Logger logger = Logger.getLogger(DmObjectFactory.class.getName());
+    private static final Gson gson = new GsonBuilder().create();
+
+    /**
+     * Create object from JSON string.
+     *
+     * @param <T> template class
+     * @param jsonString JSON string
+     * @param objectClass object class
+     * @return generated object
+     */
+    public static <T extends Object> T createObject(String jsonString, Class<T> objectClass) {
+        logger.debug("Converting JSON string to object " + objectClass + ": " + jsonString);
+        T object = gson.fromJson(jsonString, objectClass);
+        return object;
+    }
+
+    /**
+     * Create DM object from JSON string.
+     *
+     * @param <T> template class
+     * @param jsonString JSON string
+     * @param dmClass DM object class
+     * @return generated DM object
+     * @throws DmException in case of any errors
+     */
+    public static <T extends DmObject> T createDmObject(String jsonString, Class<T> dmClass) throws DmException {
+        logger.debug("Converting JSON string to DM object " + dmClass + ": " + jsonString);
+        T dmObject = gson.fromJson(jsonString, dmClass);
+        dmObject.decode();
+        return dmObject;
+    }
+
+    /**
+     * Create list of DM objects from JSON string.
+     *
+     * @param <T> template class
+     * @param jsonString DM string
+     * @return generated list of DM objects
+     */
+    public static <T extends DmObject> List<T> createDmObjectList(String jsonString) {
+        // This method does not appear to work as template, so we have
+        // to write specific methods for each object type.
+        logger.debug("Converting JSON string to dm object list: " + jsonString);
+        Type dmType = new TypeToken<LinkedList<T>>() {
+        }.getType();
+        List<T> dmObjectList = gson.fromJson(jsonString, dmType);
+        return dmObjectList;
+    }
+
+    /**
+     * Create list of string objects from JSON string.
+     *
+     * @param jsonString JSON string
+     * @return generated list of string objects
+     */
+    public static List<String> createStringObjectList(String jsonString) {
+        logger.debug("Converting JSON string to string object list: " + jsonString);
+        Type dmType = new TypeToken<LinkedList<String>>() {
+        }.getType();
+        List<String> dmObjectList = gson.fromJson(jsonString, dmType);
+        return dmObjectList;
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/objects/Experiment.java

+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package gov.anl.aps.dm.common.objects;
+
+/**
+ * Experiment class.
+ */
+public class Experiment extends DmObject {
+
+    public Experiment() {
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/ArgumentUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+import gov.anl.aps.dm.common.exceptions.InvalidArgument;
+import gov.anl.aps.dm.common.exceptions.DmException;
+import java.util.Map;
+import javax.xml.bind.DatatypeConverter;
+
+/**
+ * Utility class for processing and checking function arguments.
+ */
+public class ArgumentUtility {
+
+    /**
+     * Check that input string is not null and not empty.
+     *
+     * @param arg input argument to be checked
+     * @return true if input string is not null and not empty, false otherwise
+     */
+    public static boolean isNonEmptyString(String arg) {
+        return arg != null && !arg.isEmpty();
+    }
+
+    /**
+     * Convert input argument to string.
+     *
+     * @param arg input argument to be checked
+     * @return original argument string representation, or empty string if
+     * argument is null
+     */
+    public static String toNonNullString(Object arg) {
+        if (arg == null) {
+            return "";
+        }
+        return arg.toString();
+    }
+
+    /**
+     * Verify that input string is not null and not empty.
+     *
+     * @param argName name of the argument to be verified; used for error
+     * message
+     * @param arg input argument to be checked
+     * @throws InvalidArgument if input string is null or empty
+     */
+    public static void verifyNonEmptyString(String argName, String arg) throws InvalidArgument {
+        if (arg == null || arg.isEmpty()) {
+            throw new InvalidArgument(argName + " must be non-empty string.");
+        }
+    }
+
+    /**
+     * Verify that input string contains given pattern.
+     *
+     * @param argName name of the argument to be verified; used for error
+     * message
+     * @param arg input argument to be checked
+     * @param pattern string that must be contained in the input argument
+     * @throws InvalidArgument if input string is null or empty, or if it does
+     * not contain specified pattern
+     */
+    public static void verifyStringContainsPattern(String argName, String arg, String pattern) throws InvalidArgument {
+        verifyNonEmptyString(argName, arg);
+        verifyNonEmptyString("Pattern", pattern);
+        if (!arg.contains(pattern)) {
+            throw new InvalidArgument(argName + " must contain pattern " + pattern + ".");
+        }
+    }
+
+    /**
+     * Verify that input integer is not null and greater than zero.
+     *
+     * @param argName name of the argument to be verified; used for error
+     * message
+     * @param arg input argument to be checked
+     * @throws InvalidArgument if input number is null or not positive
+     */
+    public static void verifyPositiveInteger(String argName, Integer arg) throws InvalidArgument {
+        if (arg == null || arg <= 0) {
+            throw new InvalidArgument(argName + " must be a positive number.");
+        }
+    }
+
+    /**
+     * Verify that input double is not null and greater than zero.
+     *
+     * @param argName name of the argument to be verified; used for error
+     * message
+     * @param arg input argument to be checked
+     * @throws InvalidArgument if input number is null or not positive
+     */
+    public static void verifyPositiveDouble(String argName, Double arg) throws InvalidArgument {
+        if (arg == null || arg <= 0) {
+            throw new InvalidArgument(argName + " must be a positive number.");
+        }
+    }
+
+    /**
+     * Verify that input object is not null.
+     *
+     * @param argName name of the argument to be verified; used for error
+     * message
+     * @param arg input argument to be checked
+     * @throws InvalidArgument if input string is null or empty
+     */
+    public static void verifyNonNullObject(String argName, Object arg) throws InvalidArgument {
+        if (arg == null) {
+            throw new InvalidArgument(argName + " cannot be null.");
+        }
+    }
+
+    /**
+     * Add (key,value) pair to map if value is not null or empty.
+     *
+     * @param map target map
+     * @param key key
+     * @param value string that will be added to map if it is not null or empty
+     */
+    public static void addNonEmptyKeyValuePair(Map<String, String> map, String key, String value) {
+        if (value != null && !value.isEmpty()) {
+            map.put(key, value);
+        }
+    }
+
+    /**
+     * Add (key,value) pair to map if value is not null or empty.
+     *
+     * @param map target map
+     * @param key key
+     * @param valueObject object that will be added to map if it has non-empty
+     * string representation
+     */
+    public static void addNonEmptyKeyValuePair(Map<String, String> map, String key, Object valueObject) {
+        if (valueObject != null) {
+            String value = valueObject.toString();
+            if (!value.isEmpty()) {
+                map.put(key, value);
+            }
+        }
+    }
+
+    /**
+     * Base 64 encode.
+     *
+     * @param input input string
+     * @return base 64 encoded string
+     * @throws DmException in case of any errors
+     */
+    public static String encode(String input) throws DmException {
+        try {
+            // Input is twice encoded in order to avoid issues like
+            // '+' being interpreted as space
+            if (input == null) {
+                return input;
+            }
+            String s1 = DatatypeConverter.printBase64Binary(input.getBytes());
+            String s2 = DatatypeConverter.printBase64Binary(s1.getBytes());
+            return s2;
+        } catch (Exception ex) {
+            throw new DmException(ex);
+        }
+    }
+
+    /**
+     * Base 64 decode.
+     *
+     * @param input base 64 encoded string
+     * @return decoded string
+     * @throws DmException in case of any errors
+     */
+    public static String decode(String input) throws DmException {
+        try {
+            // Input is twice encoded in order to avoid issues like
+            // '+' being interpreted as space
+            byte[] ba1 = DatatypeConverter.parseBase64Binary(input);
+            byte[] ba2 = DatatypeConverter.parseBase64Binary(new String(ba1));
+            return new String(ba2);
+        } catch (Exception ex) {
+            throw new DmException(ex);
+        }
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/CollectionUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+import java.util.List;
+import java.util.ListIterator;
+import javax.faces.model.SelectItem;
+
+/**
+ * Utility class for manipulating collections.
+ */
+public class CollectionUtility {
+
+    /**
+     * Prepare array of SelectItem objects for menus
+     *
+     * @param entities list of objects
+     * @param selectOne true if resulting array should contain "Select" string
+     * @return array of SelectItem objects
+     */
+    public static SelectItem[] getSelectItems(List<?> entities, boolean selectOne) {
+        int size = selectOne ? entities.size() + 1 : entities.size();
+        SelectItem[] items = new SelectItem[size];
+        int i = 0;
+        if (selectOne) {
+            items[0] = new SelectItem("", "Select");
+            i++;
+        }
+        for (Object x : entities) {
+            items[i++] = new SelectItem(x, x.toString());
+        }
+        return items;
+    }
+
+    /**
+     * Prepare display string for a list of objects.
+     *
+     * @param list object list
+     * @param beginDelimiter beginning delimiter
+     * @param itemDelimiter item delimiter
+     * @param endDelimiter ending delimiter
+     * @return list display string
+     */
+    public static String displayItemList(List<?> list, String beginDelimiter, String itemDelimiter, String endDelimiter) {
+        String result = beginDelimiter;
+        boolean addItemDelimiter = false;
+        if (list != null) {
+            for (Object item : list) {
+                if (!addItemDelimiter) {
+                    addItemDelimiter = true;
+                } else {
+                    result += itemDelimiter;
+                }
+                result += item.toString();
+            }
+        }
+        result += endDelimiter;
+        return result;
+    }
+
+    /**
+     * Prepare display string for a list of objects without outside delimiters.
+     *
+     * @param list object list
+     * @param itemDelimiter item delimiter
+     * @return list display string
+     */
+    public static String displayItemListWithoutOutsideDelimiters(List<?> list, String itemDelimiter) {
+        String beginDelimiter = "";
+        String endDelimiter = "";
+        return displayItemList(list, beginDelimiter, itemDelimiter, endDelimiter);
+    }
+
+    /**
+     * Prepare display string for a list of objects with spaces as delimiters.
+     *
+     * @param list object list
+     * @return list display string
+     */
+    public static String displayItemListWithoutDelimiters(List<?> list) {
+        String beginDelimiter = "";
+        String itemDelimiter = "";
+        String endDelimiter = "";
+        return displayItemList(list, beginDelimiter, itemDelimiter, endDelimiter);
+    }
+
+    /**
+     * Remove null references from list of objects.
+     *
+     * @param list object list
+     */
+    public static void removeNullReferencesFromList(List<?> list) {
+        if (list == null) {
+            return;
+        }
+        ListIterator iterator = list.listIterator();
+        while (iterator.hasNext()) {
+            if (iterator.next() == null) {
+                iterator.remove();
+            }
+        }
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/CryptUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.spec.InvalidKeySpecException;
+import java.util.Random;
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.PBEKeySpec;
+import org.apache.log4j.Logger;
+import org.primefaces.util.Base64;
+
+/**
+ * Utility class for encrypting and verifying passwords.
+ */
+public class CryptUtility {
+
+    private static final String SecretKeyFactoryType = "PBKDF2WithHmacSHA1";
+    private static final int Pbkdf2Iterations = 1003;
+    private static final int Pbkdf2KeyLengthInBits = 192;
+    private static final int SaltLengthInBytes = 4;
+    private static final char[] SaltCharset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789".toCharArray();
+    private static final String SaltDelimiter = "$";
+
+    private static final Logger logger = Logger.getLogger(CryptUtility.class.getName());
+
+    /**
+     * Generate random string.
+     *
+     * @param characterSet set to draw characters from
+     * @param length string length
+     * @return generated string
+     */
+    public static String randomString(char[] characterSet, int length) {
+        Random random = new SecureRandom();
+        char[] result = new char[length];
+        for (int i = 0; i < result.length; i++) {
+            // picks a random index out of character set > random character
+            int randomCharIndex = random.nextInt(characterSet.length);
+            result[i] = characterSet[randomCharIndex];
+        }
+        return new String(result);
+    }
+
+    /**
+     * Encrypt password using PBKDF2 key derivation function.
+     *
+     * @param password input password
+     * @return encrypted password
+     */
+    public static String cryptPasswordWithPbkdf2(String password) {
+        String salt = randomString(SaltCharset, SaltLengthInBytes);
+        return saltAndCryptPasswordWithPbkdf2(password, salt);
+    }
+
+    /**
+     * Apply salt string and encrypt password using PBKDF2 standard.
+     *
+     * @param password input password
+     * @param salt salt string
+     * @return encrypted password
+     */
+    public static String saltAndCryptPasswordWithPbkdf2(String password, String salt) {
+        char[] passwordChars = password.toCharArray();
+        byte[] saltBytes = salt.getBytes();
+
+        PBEKeySpec spec = new PBEKeySpec(
+                passwordChars,
+                saltBytes,
+                Pbkdf2Iterations,
+                Pbkdf2KeyLengthInBits
+        );
+        SecretKeyFactory key;
+        try {
+            key = SecretKeyFactory.getInstance(SecretKeyFactoryType);
+            byte[] hashedPassword = key.generateSecret(spec).getEncoded();
+            String encodedPassword = Base64.encodeToString(hashedPassword, true);
+            return salt + SaltDelimiter + encodedPassword;
+        } catch (NoSuchAlgorithmException | InvalidKeySpecException ex) {
+            // Should not happen
+            logger.error("Password cannot be crypted: " + ex);
+        }
+        return null;
+    }
+
+    /**
+     * Verify encrypted password.
+     *
+     * @param password password to be verified
+     * @param cryptedPassword original encrypted password
+     * @return true if passwords match, false otherwise
+     */
+    public static boolean verifyPasswordWithPbkdf2(String password, String cryptedPassword) {
+        int saltEnd = cryptedPassword.indexOf(SaltDelimiter);
+        String salt = cryptedPassword.substring(0, saltEnd);
+        return cryptedPassword.equals(saltAndCryptPasswordWithPbkdf2(password, salt));
+    }
+
+    /*
+     * Main method, used for simple testing.
+     * 
+     * @param args main arguments
+     */
+    public static void main(String[] args) {
+        String password = "dm";
+        System.out.println("Original password: " + password);
+        String cryptedPassword = cryptPasswordWithPbkdf2(password);
+        System.out.println("Crypted password: " + cryptedPassword);
+        System.out.println("Verified: " + verifyPasswordWithPbkdf2(password, cryptedPassword));
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/DateUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+/**
+ * Utility class for manipulating dates.
+ */
+public class DateUtility {
+
+    private static final SimpleDateFormat DateTimeFormat = new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+
+    /**
+     * Format current date.
+     *
+     * @return formatted date string
+     */
+    public static String getCurrentDateTime() {
+        return DateTimeFormat.format(new Date());
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/FileUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+/**
+ * Utility class for manipulating files.
+ */
+public class FileUtility {
+
+    /**
+     * Get file extension.
+     *
+     * @param fileName file name
+     * @return file extension
+     */
+    public static String getFileExtension(String fileName) {
+        String extension = "";
+        if (fileName != null && !fileName.isEmpty()) {
+            int extIndex = fileName.lastIndexOf('.');
+            int dirIndex = Math.max(fileName.lastIndexOf('/'), fileName.lastIndexOf('\\'));
+            if (extIndex > dirIndex) {
+                extension = fileName.substring(extIndex + 1);
+            }
+        }
+        return extension.toLowerCase();
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/LdapUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+import gov.anl.aps.dm.portal.utilities.ConfigurationUtility;
+import java.util.Hashtable;
+import javax.naming.Context;
+import javax.naming.NamingException;
+import javax.naming.directory.DirContext;
+import javax.naming.directory.InitialDirContext;
+import org.apache.log4j.Logger;
+
+/**
+ * LDAP utility class for verifying user credentials.
+ *
+ * @see NoServerVerificationSSLSocketFactory
+ */
+public class LdapUtility {
+
+    private static final String LdapUrlPropertyName = "dm.portal.ldapUrl";
+    private static final String LdapDnStringPropertyName = "dm.portal.ldapDnString";
+    private static final String ldapUrl = ConfigurationUtility.getPortalProperty(LdapUrlPropertyName);
+    private static final String ldapDnString = ConfigurationUtility.getPortalProperty(LdapDnStringPropertyName);
+
+    private static final Logger logger = Logger.getLogger(LdapUtility.class.getName());
+
+    /**
+     * Validate user credentials.
+     *
+     * Use username and password to attempt initial connection and bind with
+     * LDAP server. Successful connection implies that credentials are accepted.
+     *
+     * @param username username
+     * @param password password
+     *
+     * @return true if credentials are valid, false otherwise
+     */
+    public static boolean validateCredentials(String username, String password) {
+
+        // dump out immediately if not given password
+        if (password.isEmpty()) {
+            return false;
+        }
+
+        boolean validated = false;
+        Hashtable env = new Hashtable();
+        String dn = ldapDnString.replace("USERNAME", username);
+        logger.debug("Authenticating: " + dn);
+        env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
+        env.put(Context.PROVIDER_URL, ldapUrl);
+        env.put(Context.SECURITY_AUTHENTICATION, "simple");
+        env.put(Context.SECURITY_PRINCIPAL, dn);
+        env.put(Context.SECURITY_CREDENTIALS, password);
+        // the below property allows us to circumvent server certificate checks
+        env.put("java.naming.ldap.factory.socket", "gov.anl.aps.dm.common.utilities.NoServerVerificationSSLSocketFactory");
+        try {
+            DirContext ctx = new InitialDirContext(env);
+            validated = true;
+        } catch (NamingException ex) {
+            logger.error(ex);
+        }
+        return validated;
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/NoOpTrustManager.java

+package gov.anl.aps.dm.common.utilities;
+
+import java.security.cert.X509Certificate;
+import javax.net.ssl.X509TrustManager;
+
+/**
+ * Dummy trust manager class.
+ *
+ * A trivial implementation of <code>X509TrustManager</code> that doesn't
+ * actually check the validity of a certificate. This allows us to make SSL
+ * connections to internal servers without requiring the installation and
+ * maintenance of certificates in the client keystore.
+ *
+ * @see NoServerVerificationSSLSocketFactory
+ */
+public class NoOpTrustManager implements X509TrustManager {
+
+    @Override
+    public void checkClientTrusted(X509Certificate[] cert, String authType) {
+    }
+
+    @Override
+    public void checkServerTrusted(X509Certificate[] cert, String authType) {
+    }
+
+    @Override
+    public X509Certificate[] getAcceptedIssuers() {
+        return new X509Certificate[0];
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/NoServerVerificationSSLSocketFactory.java

+package gov.anl.aps.dm.common.utilities;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.Socket;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import javax.net.SocketFactory;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSocketFactory;
+import javax.net.ssl.TrustManager;
+import org.apache.log4j.Logger;
+
+/**
+ * SSL socket factory that does not verify server credentials.
+ *
+ * A minor extension of <code>SSLSocketFactory</code> that installs a dummy
+ * trust manager. This allows creation of SSL sockets that don't verify the
+ * server certificates.
+ *
+ * @see NoOpTrustManager
+ */
+public class NoServerVerificationSSLSocketFactory extends SSLSocketFactory {
+
+    private static final Logger logger = Logger.getLogger(NoServerVerificationSSLSocketFactory.class.getName());
+
+    private SSLSocketFactory factory;
+
+    /**
+     * Default constructor.
+     */
+    public NoServerVerificationSSLSocketFactory() {
+        try {
+            TrustManager tm = new NoOpTrustManager();
+            SSLContext sslcontext = SSLContext.getInstance("TLS");
+            sslcontext.init(null, // No KeyManager required
+                    new TrustManager[]{tm},
+                    new java.security.SecureRandom());
+
+            factory = (SSLSocketFactory) sslcontext.getSocketFactory();
+        } catch (KeyManagementException | NoSuchAlgorithmException ex) {
+            logger.error(ex);
+        }
+    }
+
+    /**
+     * Get default (no server verification) socket factory.
+     *
+     * @return socket factory
+     */
+    public static SocketFactory getDefault() {
+        return new NoServerVerificationSSLSocketFactory();
+    }
+
+    /**
+     * Create SSL socket layered over an existing socket connected to the named
+     * host, at a given port.
+     *
+     * @param socket existing socket
+     * @param host
+     * @param port
+     * @param autoClose
+     * @return created socket
+     * @throws IOException in case of IO errors
+     */
+    @Override
+    public Socket createSocket(Socket socket, String host, int port, boolean autoClose)
+            throws IOException {
+        return factory.createSocket(socket, host, port, autoClose);
+    }
+
+    /**
+     * Create a socket and connect it to the specified remote address/port, and
+     * bind it to the specified local address/port.
+     *
+     * @param address server network address
+     * @param port server port
+     * @param localAddress client network address
+     * @param localPort client port
+     * @return created socket
+     * @throws IOException in case of IO errors
+     */
+    @Override
+    public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort)
+            throws IOException {
+        return factory.createSocket(address, port, localAddress, localPort);
+    }
+
+    /**
+     * Create a socket and connect it to the specified remote address/port.
+     *
+     * @param address server network address
+     * @param port server port
+     * @return created socket
+     * @throws IOException in case of IO errors
+     */
+    @Override
+    public Socket createSocket(InetAddress address, int port) throws IOException {
+        return factory.createSocket(address, port);
+    }
+
+    /**
+     * Create a socket and connect it to the specified remote host/port, and
+     * bind it to the specified local address/port.
+     *
+     * @param host server host
+     * @param port server port
+     * @param localAddress client network address
+     * @param localPort client port
+     * @return created socket
+     * @throws IOException in case of IO errors
+     */
+    @Override
+    public Socket createSocket(String host, int port, InetAddress localAddress, int localPort)
+            throws IOException {
+        return factory.createSocket(host, port, localAddress, localPort);
+    }
+
+    /**
+     * Create a socket and connect it to the specified remote host/port, and
+     * bind it to the specified local address/port.
+     *
+     * @param host server host
+     * @param port server port
+     * @return created socket
+     * @throws IOException in case of IO errors
+     */
+    @Override
+    public Socket createSocket(String host, int port) throws IOException {
+        return factory.createSocket(host, port);
+    }
+
+    /**
+     * Get default cipher suites from socket factory.
+     *
+     * @return list of default ciphers
+     */
+    @Override
+    public String[] getDefaultCipherSuites() {
+        return factory.getSupportedCipherSuites();
+    }
+
+    /**
+     * Get supported cipher suites from socket factory.
+     *
+     * @return list of supported ciphers
+     */
+    @Override
+    public String[] getSupportedCipherSuites() {
+        return factory.getSupportedCipherSuites();
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/ObjectUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+/**
+ * Object utility class.
+ */
+public class ObjectUtility {
+
+    /**
+     * Verify that two objects are the same.
+     *
+     * Object references can be null.
+     *
+     * @param <Type> template type of given objects
+     * @param object1 first object
+     * @param object2 second object
+     * @return true if objects are equal, false otherwise
+     */
+    public static <Type> boolean equals(Type object1, Type object2) {
+        if (object1 == null && object2 == null) {
+            return true;
+        }
+        if (object1 == null || object2 == null) {
+            return false;
+        }
+        return object1.equals(object2);
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/common/utilities/StringUtility.java

+package gov.anl.aps.dm.common.utilities;
+
+/**
+ * String utility class.
+ */
+public class StringUtility {
+
+    /**
+     * Verify that two char sequences are the same.
+     *
+     * Input string references can be null.
+     *
+     * @param cs1 first sequence
+     * @param cs2 second sequence
+     * @return true if char sequences are the same, false otherwise
+     */
+    public static boolean equals(CharSequence cs1, CharSequence cs2) {
+        if (cs1 == null && cs2 == null) {
+            return true;
+        }
+        if (cs1 == null || cs2 == null) {
+            return false;
+        }
+        return cs1.equals(cs2);
+    }
+
+    /**
+     * Capitalize first letter of a given string.
+     *
+     * @param input input string
+     * @return capitalized string
+     */
+    public static String capitalize(String input) {
+        return input.substring(0, 1).toUpperCase() + input.substring(1);
+    }
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/portal/constants/DmStatus.java

+
+package gov.anl.aps.dm.portal.constants;
+
+/**
+ * Status codes.
+ */
+public class DmStatus
+{
+    public static final int DM_OK = 0;
+    public static final int DM_ERROR = 1;
+    public static final int DM_DB_ERROR = 2;
+    public static final int DM_TIMEOUT = 3;
+    public static final int DM_INVALID_ARGUMENT = 4;
+    public static final int DM_INVALID_OBJECT_STATE = 5;
+    public static final int DM_OBJECT_ALREADY_EXISTS = 6;
+    public static final int DM_OBJECT_NOT_FOUND = 7;
+    public static final int DM_INVALID_DATE = 8;
+    public static final int DM_MISSING_PROPERTY = 9;
+}
\ No newline at end of file

src/java/DmWebPortal/src/java/gov/anl/aps/dm/portal/controllers/DmEntityController.java

+package gov.anl.aps.dm.portal.controllers;
+
+import gov.anl.aps.dm.common.exceptions.DmException;
+import gov.anl.aps.dm.common.exceptions.InvalidRequest;
+import gov.anl.aps.dm.portal.model.beans.DmEntityDbFacade;
+import gov.anl.aps.dm.portal.model.entities.DmEntity;
+import gov.anl.aps.dm.common.utilities.CollectionUtility;
+import gov.anl.aps.dm.common.utilities.StringUtility;
+import gov.anl.aps.dm.portal.utilities.SessionUtility;
+
+import java.io.Serializable;
+
+import java.util.List;
+import javax.annotation.PostConstruct;
+import javax.faces.model.DataModel;
+import javax.faces.model.ListDataModel;
+import javax.faces.model.SelectItem;
+import org.apache.log4j.Logger;
+import org.primefaces.event.data.FilterEvent;
+
+public abstract class DmEntityController<EntityType extends DmEntity, FacadeType extends DmEntityDbFacade<EntityType>> implements Serializable {
+
+    private static final Logger logger = Logger.getLogger(DmEntityController.class.getName());
+    private static final int NUMBER_OF_ROWS_FOR_DISPLAY_LIST = 25;
+    private static final int NUMBER_OF_ROWS_FOR_SELECT_LIST = 10;
+
+    protected EntityType current = null;
+
+    private DataModel listDataModel = null;
+    private List<EntityType> filteredObjectList = null;
+
+    private DataModel selectDataModel = null;
+    private List<EntityType> selectedObjectList = null;
+
+    private int displayNumberOfItemsPerPage = NUMBER_OF_ROWS_FOR_DISPLAY_LIST;
+    private int selectNumberOfItemsPerPage = NUMBER_OF_ROWS_FOR_SELECT_LIST;
+
+    protected String breadcrumbViewParam = null;
+    protected String breadcrumbObjectIdViewParam = null;
+    
+    public DmEntityController() {
+    }
+
+    @PostConstruct
+    public void initialize() {
+    }
+
+    /**
+     * Navigate to invalid request error page.
+     *
+     * @param error error message
+     */
+    public void handleInvalidSessionRequest(String error) {
+        SessionUtility.setLastSessionError(error);
+        SessionUtility.navigateTo("/views/error/invalidRequest?faces-redirect=true");
+    }
+    
+    protected abstract FacadeType getFacade();
+
+    protected abstract EntityType createEntityInstance();
+
+    public abstract String getEntityTypeName();
+
+    public String getDisplayEntityTypeName() {
+        return getEntityTypeName();
+    }
+
+    public abstract String getCurrentEntityInstanceName();
+
+    public EntityType getCurrent() {
+        return current;
+    }
+
+    public void setCurrent(EntityType current) {
+        this.current = current;
+    }
+
+    /**
+     * Find entity instance by id.
+     *
+     * @param id entity instance id
+     * @return entity instance
+     */
+    public EntityType findById(Integer id) {
+        return null;
+    }
+    
+    public void selectByRequestParams() {
+    }
+
+    public EntityType getSelected() {
+        if (current == null) {
+            current = createEntityInstance();
+        }
+        return current;
+    }
+
+    public boolean isEntitySelected() {
+        return (current != null);
+    }
+
+    public void onFilterChange(FilterEvent filterEvent) {
+    }
+
+    /**
+     * Clear entity list filters.
+     *
+     * This method should be overridden in any derived controller class that has
+     * its own filters.
+     */
+    public void clearListFilters() {
+    }
+
+    /**
+     * Clear entity selection list filters.
+     *
+     * This method should be overridden in any derived controller class that has
+     * its own select filters.
+     */
+    public void clearSelectFilters() {
+    }
+
+    public String resetList() {
+        logger.debug("Resetting list data model for " + getDisplayEntityTypeName());
+        clearListFilters();
+        resetListDataModel();
+        return prepareList();
+    }
+
+    public String prepareList() {
+        logger.debug("Preparing list data model for " + getDisplayEntityTypeName());
+        current = null;
+        return "list?faces-redirect=true";
+    }
+
+    /**
+     * Process view request parameters.
+     * 
+     * If request is not valid, user will be redirected to appropriate error
+     * page.
+     */
+    public void processViewRequestParams() {
+        try {
+            EntityType entity = selectByViewRequestParams();
+            if (entity != null) {
+                prepareEntityView(entity);
+            }
+        } catch (DmException ex) {
+            handleInvalidSessionRequest(ex.getErrorMessage());
+        }
+    }
+
+    /**
+     * Set breadcrumb variables from request parameters.
+     */
+    protected void setBreadcrumbRequestParams() {
+        if (breadcrumbViewParam == null) {
+            breadcrumbViewParam = SessionUtility.getRequestParameterValue("breadcrumb");
+        }
+        if (breadcrumbObjectIdViewParam == null) {
+            breadcrumbObjectIdViewParam = SessionUtility.getRequestParameterValue("breadcrumbObjectId");
+        }
+    }
+
+    /**
+     * Select current entity instance for view from request parameters.
+     * 
+     * @return selected entity instance
+     * @throws DmException in case of invalid request parameter values
+     */
+    public EntityType selectByViewRequestParams() throws DmException {
+        setBreadcrumbRequestParams();
+        Integer idParam = null;
+        String paramValue = SessionUtility.getRequestParameterValue("id");
+        try {
+            if (paramValue != null) {
+                idParam = Integer.parseInt(paramValue);
+            }
+        } catch (NumberFormatException ex) {
+            throw new InvalidRequest("Invalid value supplied for " + getDisplayEntityTypeName() + " id: " + paramValue);
+        }
+        if (idParam != null) {
+            EntityType entity = findById(idParam);
+            if (entity == null) {
+                throw new InvalidRequest(StringUtility.capitalize(getDisplayEntityTypeName()) + " id " + idParam + " does not exist.");
+            }
+            setCurrent(entity);
+            return entity;
+        } else if (current == null || current.getId() == null) {
+            throw new InvalidRequest(StringUtility.capitalize(getDisplayEntityTypeName()) + " has not been selected.");
+        }
+        return current;
+    }
+
+    /**
+     * Follow breadcrumb if it is set, or prepare entity list view.
+     * 
+     * @return previous view if breadcrumb parameters are set, or entity list
+     * view otherwise
+     */
+    public String followBreadcrumbOrPrepareList() {
+        String loadView = breadcrumbViewParam;
+        if (loadView == null) {
+            loadView = prepareList();
+        } else {
+            if (breadcrumbObjectIdViewParam != null) {
+                Integer entityId = Integer.parseInt(breadcrumbObjectIdViewParam);
+                loadView = breadcrumbViewParam + "?faces-redirect=true&id=" + entityId;
+            }
+        }
+        breadcrumbViewParam = null;
+        breadcrumbObjectIdViewParam = null;
+        return loadView;
+    }
+
+    public String prepareView(EntityType entity) {
+        logger.debug("Preparing view for " + entity.toString());
+        current = entity;
+        prepareEntityView(entity);
+        return view();
+    }
+
+    protected void prepareEntityView(EntityType entity) {
+    }
+
+    public void clear() {
+    }
+
+    public String view() {
+        return "view?faces-redirect=true";
+    }
+
+    public String prepareCreate() {
+        current = createEntityInstance();
+        return "create?faces-redirect=true";
+    }
+
+    protected void prepareEntityInsert(EntityType entity) throws DmException {
+    }
+
+    public String create() {
+        try {
+            EntityType newEntity = current;
+            prepareEntityInsert(current);
+            getFacade().create(current);
+            SessionUtility.addInfoMessage("Success", "Created " + getDisplayEntityTypeName() + " " + getCurrentEntityInstanceName() + ".");
+            resetListDataModel();
+            current = newEntity;
+            return prepareList();
+        } catch (DmException | RuntimeException ex) {
+            SessionUtility.addErrorMessage("Error", "Could not create " + getDisplayEntityTypeName() + ": " + ex.getMessage());
+            return null;
+        }
+    }
+
+    public String prepareEdit(EntityType entity) {
+        current = entity;
+        return edit();
+    }
+
+    public String edit() {
+        resetSelectDataModel();
+        return "edit?faces-redirect=true";
+    }
+
+    protected void prepareEntityUpdate(EntityType entity) throws DmException {
+    }
+
+    public String update() {
+        try {
+            logger.debug("Updating " + getDisplayEntityTypeName() + " " + getCurrentEntityInstanceName());
+            EntityType updatedEntity = current;
+            prepareEntityUpdate(updatedEntity);
+            getFacade().edit(updatedEntity);
+            SessionUtility.addInfoMessage("Success", "Updated " + getDisplayEntityTypeName() + " " + getCurrentEntityInstanceName() + ".");
+            resetListDataModel();
+            current = updatedEntity;
+            return view();
+        } catch (DmException ex) {
+            SessionUtility.addErrorMessage("Error", "Could not update " + getDisplayEntityTypeName() + ": " + ex.getMessage());
+            return null;
+        } catch (RuntimeException ex) {
+            SessionUtility.addErrorMessage("Error", "Could not update " + getDisplayEntityTypeName() + ": " + getObjectAlreadyExistMessage(current));
+            return null;
+        }
+    }
+
+    protected String getObjectAlreadyExistMessage(EntityType entity) {
+        return "";
+    }
+
+    protected void prepareEntityUpdateOnRemoval(EntityType entity) throws DmException {
+    }
+    
+    public String updateOnRemoval() {
+        try {
+            logger.debug("Updating " + getDisplayEntityTypeName() + " " + getCurrentEntityInstanceName());
+            prepareEntityUpdateOnRemoval(current);
+            getFacade().edit(current);
+            EntityType updatedEntity = current;
+            SessionUtility.addInfoMessage("Success", "Updated " + getDisplayEntityTypeName() + " " + getCurrentEntityInstanceName() + ".");
+            resetListDataModel();
+            resetSelectDataModel();
+            current = updatedEntity;
+            return view();
+        } catch (DmException ex) {
+            SessionUtility.addErrorMessage("Error", "Could not update " + getDisplayEntityTypeName() + ": " + ex.getMessage());
+            return null;
+        } catch (RuntimeException ex) {
+            logger.error("Could not update " + getDisplayEntityTypeName() + " "
+                    + getCurrentEntityInstanceName() + ": " + ex.getMessage());
+            SessionUtility.addErrorMessage("Error", "Could not update " + getDisplayEntityTypeName() + ": " + ex.getMessage());
+            return null;
+        }
+    }
+
+    protected void prepareEntityDestroy(EntityType entity) throws DmException {
+    }
+
+    public void destroy(EntityType entity) {
+        current = entity;
+        destroy();
+    }
+
+    public String destroy() {
+        if (current == null) {
+            logger.warn("Current item is not set");
+            // Do nothing if current item is not set.
+            return null;
+        }
+        try {
+            logger.debug("Destroying " + getCurrentEntityInstanceName());
+            getFacade().remove(current);
+            SessionUtility.addInfoMessage("Success", "Deleted " + getDisplayEntityTypeName() + " " + getCurrentEntityInstanceName() + ".");
+            resetListDataModel();
+            return prepareList();
+        } catch (Exception ex) {
+            SessionUtility.addErrorMessage("Error", "Could not delete " + getDisplayEntityTypeName() + ": " + ex.getMessage());
+            return null;
+        }
+    }
+
+    public DataModel createListDataModel() {
+        return new ListDataModel(getFacade().findAll());
+    }
+
+    public DataModel getListDataModel() {
+        if (listDataModel == null) {
+            listDataModel = createListDataModel();
+        }
+        return listDataModel;
+    }
+
+    public void prepareEntityListForSelection(List<EntityType> selectEntityList) {
+    }
+
+    public DataModel createSelectDataModel() {
+        List<EntityType> selectEntityList = getFacade().findAll();
+        prepareEntityListForSelection(selectEntityList);
+        return new ListDataModel(selectEntityList);
+    }
+
+    public DataModel getSelectDataModel() {
+        if (selectDataModel == null) {
+            selectDataModel = createSelectDataModel();
+        }
+        return selectDataModel;
+    }
+
+    public DataModel getItems() {
+        return getListDataModel();
+    }
+
+    public List<EntityType> getSelectedObjectListAndResetSelectDataModel() {
+        List<EntityType> returnList = selectedObjectList;
+        resetSelectDataModel();
+        return returnList;
+    }
+
+    public List<EntityType> getSelectedObjectList() {
+        return selectedObjectList;
+    }
+
+    public List<EntityType> getFilteredObjectList() {
+        return filteredObjectList;
+    }
+
+    public List<EntityType> getFilteredItems() {
+        return filteredObjectList;
+    }
+
+    public void resetSelectedObjectList() {
+        selectedObjectList = null;
+    }
+
+    public void setSelectedObjectList(List<EntityType> selectedObjectList) {
+        this.selectedObjectList = selectedObjectList;
+    }
+
+    public void setFilteredObjectList(List<EntityType> filteredObjectList) {
+        this.filteredObjectList = filteredObjectList;
+    }
+
+    public void setFilteredItems(List<EntityType> filteredItems) {
+        this.filteredObjectList = filteredItems;
+    }
+
+    public void resetListDataModel() {
+        listDataModel = null;
+        filteredObjectList = null;
+        current = null;
+    }
+
+    public void resetSelectDataModel() {
+        selectDataModel = null;
+        selectedObjectList = null;
+    }
+
+    public List<EntityType> getAvailableItems() {
+        return getFacade().findAll();
+    }
+
+    public EntityType getEntity(Integer id) {
+        return getFacade().find(id);
+    }
+
+    public SelectItem[] getAvailableItemsForSelectMany() {
+        return CollectionUtility.getSelectItems(getFacade().findAll(), false);
+    }
+
+    public SelectItem[] getAvailableItemsForSelectOne() {
+        return CollectionUtility.getSelectItems(getFacade().findAll(), true);
+    }
+
+    public String getCurrentViewId() {
+        return SessionUtility.getCurrentViewId();
+    }
+
+    public static String displayEntityList(List<?> entityList) {
+        String itemDelimiter = ", ";
+        return CollectionUtility.displayItemListWithoutOutsideDelimiters(entityList, itemDelimiter);
+    }
+
+    public int getDisplayNumberOfItemsPerPage() {
+        return displayNumberOfItemsPerPage;
+    }
+
+    public void setDisplayNumberOfItemsPerPage(int displayNumberOfItemsPerPage) {
+        this.displayNumberOfItemsPerPage = displayNumberOfItemsPerPage;
+    }
+
+    public int getSelectNumberOfItemsPerPage() {
+        return selectNumberOfItemsPerPage;
+    }
+
+    public void setSelectNumberOfItemsPerPage(int selectNumberOfItemsPerPage) {
+        this.selectNumberOfItemsPerPage = selectNumberOfItemsPerPage;
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/portal/controllers/ExperimentController.java

+package gov.anl.aps.dm.portal.controllers;
+
+import gov.anl.aps.dm.api.ExperimentDsApi;
+import gov.anl.aps.dm.common.exceptions.DmException;
+import gov.anl.aps.dm.common.exceptions.ObjectAlreadyExists;
+import gov.anl.aps.dm.common.exceptions.InvalidRequest;
+import gov.anl.aps.dm.portal.model.entities.Experiment;
+import gov.anl.aps.dm.portal.model.beans.ExperimentDbFacade;
+import gov.anl.aps.dm.portal.model.beans.ExperimentRoleTypeDbFacade;
+import gov.anl.aps.dm.portal.model.beans.UserExperimentRoleDbFacade;
+import gov.anl.aps.dm.portal.model.entities.ExperimentRoleType;
+import gov.anl.aps.dm.portal.model.entities.ExperimentStation;
+import gov.anl.aps.dm.portal.model.entities.UserExperimentRole;
+import gov.anl.aps.dm.portal.model.entities.UserExperimentRolePK;
+import gov.anl.aps.dm.portal.model.entities.UserInfo;
+import gov.anl.aps.dm.portal.utilities.DmApiFactory;
+import gov.anl.aps.dm.portal.utilities.SessionUtility;
+import java.util.List;
+
+import javax.ejb.EJB;
+import javax.inject.Named;
+import javax.enterprise.context.SessionScoped;
+import javax.faces.component.UIComponent;
+import javax.faces.context.FacesContext;
+import javax.faces.convert.Converter;
+import javax.faces.convert.FacesConverter;
+import org.apache.log4j.Logger;
+
+@Named("experimentController")
+@SessionScoped
+public class ExperimentController extends DmEntityController<Experiment, ExperimentDbFacade> {
+
+    private static final Logger logger = Logger.getLogger(ExperimentController.class.getName());
+
+    @EJB
+    private ExperimentDbFacade experimentDbFacade;
+    @EJB
+    private UserExperimentRoleDbFacade userExperimentRoleDbFacade;
+    @EJB
+    private ExperimentRoleTypeDbFacade experimentRoleTypeDbFacade;
+
+    private UserExperimentRole currentUserExperimentRole = null;
+    private Experiment currentStationExperiment = null;
+
+    private String filterByName = null;
+    private String filterByType = null;
+    private String filterByStation = null;
+    private String filterByDescription = null;
+    private String filterByStartDate = null;
+    private String filterByEndDate = null;
+
+    private String selectFilterByName = null;
+    private String selectFilterByType = null;
+    private String selectFilterByStation = null;
+    private String selectFilterByDescription = null;
+    private String selectFilterByStartDate = null;
+    private String selectFilterByEndDate = null;
+
+    public ExperimentController() {
+    }
+
+    @Override
+    protected ExperimentDbFacade getFacade() {
+        return experimentDbFacade;
+    }
+
+    @Override
+    protected Experiment createEntityInstance() {
+        Experiment newExperiment = new Experiment();
+        return newExperiment;
+    }
+
+    @Override
+    public String getEntityTypeName() {
+        return "experiment";
+    }
+
+    @Override
+    public String getCurrentEntityInstanceName() {
+        if (getCurrent() != null) {
+            return getCurrent().getName();
+        }
+        return "";
+    }
+
+    @Override
+    public Experiment findById(Integer id) {
+        return experimentDbFacade.findById(id);
+    }
+
+    @Override
+    public void prepareEntityInsert(Experiment experiment) throws DmException {
+        if ((experiment.getName() == null) || (experiment.getName().length() == 0)) {
+            throw new InvalidRequest("Experiment name is missing.");
+        }
+        Experiment existingExperiment = experimentDbFacade.findByName(experiment.getName());
+        if (existingExperiment != null) {
+            throw new ObjectAlreadyExists("Experiment " + experiment.getName() + " already exists.");
+        }
+        verifyExperiment(experiment);
+        logger.debug("Inserting new experiment " + experiment.getName());
+    }
+
+    @Override
+    public void prepareEntityUpdate(Experiment experiment) throws DmException {
+        if ((experiment.getName() == null) || (experiment.getName().length() == 0)) {
+            throw new InvalidRequest("Experiment name is missing.");
+        }
+        verifyExperiment(experiment);
+        logger.debug("Updating experiment " + experiment.getName());
+    }
+
+    @Override
+    protected String getObjectAlreadyExistMessage(Experiment experiment) {
+        if (experiment == null) {
+            return null;
+        }
+        return "Experiment " + experiment.getName() + " already exists.";
+    }
+
+    private void verifyExperiment(Experiment experiment) throws DmException {
+        if (experiment.getExperimentType() == null) {
+            throw new InvalidRequest("Experiment type is missing.");
+        }
+
+        if (experiment.getExperimentStation() == null) {
+            throw new InvalidRequest("Experiment station is missing.");
+        }
+
+        if ((experiment.getStartDate() != null) && (experiment.getEndDate() != null) && (experiment.getEndDate().before(experiment.getStartDate()))) {
+            throw new InvalidRequest("Experiment end date is before start date.");
+        }
+    }
+
+    @Override
+    public String update() {
+        // Notify DS Web Service
+        try {
+            ExperimentDsApi api = DmApiFactory.getExperimentDsApi();
+            api.updateExperiment(getCurrent().getName());
+        } catch (DmException ex) {
+            logger.error("Could not notify Data Storage Service: " + ex);
+            SessionUtility.addErrorMessage("Error", "Unable to notify Data Storage Service: " + ex.getErrorMessage());
+        }
+        clear();
+        return super.update();
+    }
+
+    public UserExperimentRole getCurrentUserExperimentRole() {
+        if (currentUserExperimentRole == null) {
+            currentUserExperimentRole = new UserExperimentRole();
+        }
+        return currentUserExperimentRole;
+    }
+
+    public void setCurrentUserExperimentRole(UserExperimentRole currentUserExperimentRole) {
+        this.currentUserExperimentRole = currentUserExperimentRole;
+    }
+
+    public void prepareAddUserExperimentRole(Experiment experiment) {
+        UserExperimentRole userExperimentRole = getCurrentUserExperimentRole();
+        userExperimentRole.setExperiment(experiment);
+    }
+
+    private void addUserExperimentRole() {
+        UserInfo user = currentUserExperimentRole.getUserInfo();
+        Experiment experiment = currentUserExperimentRole.getExperiment();
+        ExperimentRoleType roleType = currentUserExperimentRole.getExperimentRoleType();
+        UserExperimentRolePK userExperimentRolePK = new UserExperimentRolePK();
+        userExperimentRolePK.setExperimentId(experiment.getId());
+        userExperimentRolePK.setUserId(user.getId());
+        userExperimentRolePK.setRoleTypeId(roleType.getId());
+        currentUserExperimentRole.setUserExperimentRolePK(userExperimentRolePK);
+
+        UserExperimentRole existingRole = userExperimentRoleDbFacade.findByUserAndExperiment(user.getId(),
+                experiment.getId());
+        if (existingRole != null) {
+            SessionUtility.addErrorMessage("Error", "Could not add experiment user: User "
+                    + user.getUsername()
+                    + " is already associated with experiment "
+                    + existingRole.getExperiment().getName() + " as "
+                    + existingRole.getExperimentRoleType().getName() + ".");
+            return;
+        }
+        List<UserExperimentRole> userExperimentRoleList = experiment.getUserExperimentRoleList();
+        userExperimentRoleList.add(0, currentUserExperimentRole);
+        update();
+        currentUserExperimentRole = null;
+    }
+
+    public void addUserExperimentRolePi() {
+        currentUserExperimentRole.setExperimentRoleType(experimentRoleTypeDbFacade.findPiRoleType());
+        addUserExperimentRole();
+    }
+
+    public void addUserExperimentRoleUser() {
+        currentUserExperimentRole.setExperimentRoleType(experimentRoleTypeDbFacade.findUserRoleType());
+        addUserExperimentRole();
+    }
+
+    public void deleteUserExperimentRole(UserExperimentRole userExperimentRole) {
+        Experiment experiment = getCurrent();
+        userExperimentRoleDbFacade.remove(userExperimentRole);
+        List<UserExperimentRole> userExperimentRoleList = experiment.getUserExperimentRoleList();
+        userExperimentRoleList.remove(userExperimentRole);
+        updateOnRemoval();
+    }
+
+    public Experiment getCurrentStationExperiment() {
+        if (currentStationExperiment == null) {
+            currentStationExperiment = new Experiment();
+        }
+        return currentStationExperiment;
+    }
+
+    public void setCurrentStationExperiment(Experiment currentStationExperiment) {
+        this.currentStationExperiment = currentStationExperiment;
+    }
+
+    public void prepareAddStationExperiment(ExperimentStation experimentStation) {
+        currentStationExperiment = getCurrentStationExperiment();
+        currentStationExperiment.setExperimentStation(experimentStation);
+    }
+
+    public void addStationExperiment() {
+        try {
+            prepareEntityInsert(currentStationExperiment);
+            getFacade().create(currentStationExperiment);
+            SessionUtility.addInfoMessage("Success", "Created experiment " + currentStationExperiment.getName() + ".");
+            resetListDataModel();
+            current = currentStationExperiment;
+            List<Experiment> stationExperimentList = currentStationExperiment.getExperimentStation().getExperimentList();
+            stationExperimentList.add(0, currentStationExperiment);
+            currentStationExperiment = null;
+        } catch (DmException | RuntimeException ex) {
+            SessionUtility.addErrorMessage("Error", "Could not create experiment: " + ex.getMessage());
+        }
+    }
+
+    public void deleteStationExperiment(Experiment stationExperiment) {
+        List<Experiment> stationExperimentList = stationExperiment.getExperimentStation().getExperimentList();
+        stationExperimentList.remove(stationExperiment);
+        destroy(stationExperiment);
+    }
+
+    @Override
+    public void clearListFilters() {
+        filterByName = null;
+        filterByType = null;
+        filterByStation = null;
+        filterByDescription = null;
+        filterByStartDate = null;
+        filterByEndDate = null;
+    }
+
+    @Override
+    public void clearSelectFilters() {
+        selectFilterByName = null;
+        selectFilterByType = null;
+        selectFilterByStation = null;
+        selectFilterByDescription = null;
+        selectFilterByStartDate = null;
+        selectFilterByEndDate = null;
+    }
+
+    public String getFilterByName() {
+        return filterByName;
+    }
+
+    public void setFilterByName(String filterByName) {
+        this.filterByName = filterByName;
+    }
+
+    public String getFilterByType() {
+        return filterByType;
+    }
+
+    public void setFilterByType(String filterByType) {
+        this.filterByType = filterByType;
+    }
+
+    public String getFilterByStation() {
+        return filterByStation;
+    }
+
+    public void setFilterByStation(String filterByStation) {
+        this.filterByStation = filterByStation;
+    }
+
+    public String getFilterByDescription() {
+        return filterByDescription;
+    }
+
+    public void setFilterByDescription(String filterByDescription) {
+        this.filterByDescription = filterByDescription;
+    }
+
+    public String getFilterByStartDate() {
+        return filterByStartDate;
+    }
+
+    public void setFilterByStartDate(String filterByStartDate) {
+        this.filterByStartDate = filterByStartDate;
+    }
+
+    public String getFilterByEndDate() {
+        return filterByEndDate;
+    }
+
+    public void setFilterByEndDate(String filterByEndDate) {
+        this.filterByEndDate = filterByEndDate;
+    }
+
+    public String getSelectFilterByName() {
+        return selectFilterByName;
+    }
+
+    public void setSelectFilterByName(String selectFilterByName) {
+        this.selectFilterByName = selectFilterByName;
+    }
+
+    public String getSelectFilterByType() {
+        return selectFilterByType;
+    }
+
+    public void setSelectFilterByType(String selectFilterByType) {
+        this.selectFilterByType = selectFilterByType;
+    }
+
+    public String getSelectFilterByStation() {
+        return selectFilterByStation;
+    }
+
+    public void setSelectFilterByStation(String selectFilterByStation) {
+        this.selectFilterByStation = selectFilterByStation;
+    }
+
+    public String getSelectFilterByDescription() {
+        return selectFilterByDescription;
+    }
+
+    public void setSelectFilterByDescription(String selectFilterByDescription) {
+        this.selectFilterByDescription = selectFilterByDescription;
+    }
+
+    public String getSelectFilterByStartDate() {
+        return selectFilterByStartDate;
+    }
+
+    public void setSelectFilterByStartDate(String selectFilterByStartDate) {
+        this.selectFilterByStartDate = selectFilterByStartDate;
+    }
+
+    public String getSelectFilterByEndDate() {
+        return selectFilterByEndDate;
+    }
+
+    public void setSelectFilterByEndDate(String selectFilterByEndDate) {
+        this.selectFilterByEndDate = selectFilterByEndDate;
+    }
+
+    @FacesConverter(forClass = Experiment.class)
+    public static class ExperimentControllerConverter implements Converter {
+
+        @Override
+        public Object getAsObject(FacesContext facesContext, UIComponent component, String value) {
+            if (value == null || value.length() == 0) {
+                return null;
+            }
+            ExperimentController controller = (ExperimentController) facesContext.getApplication().getELResolver().
+                    getValue(facesContext.getELContext(), null, "experimentController");
+            return controller.getEntity(getKey(value));
+        }
+
+        java.lang.Integer getKey(String value) {
+            java.lang.Integer key;
+            key = Integer.valueOf(value);
+            return key;
+        }
+
+        String getStringKey(java.lang.Integer value) {
+            StringBuilder sb = new StringBuilder();
+            sb.append(value);
+            return sb.toString();
+        }
+
+        @Override
+        public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
+            if (object == null) {
+                return null;
+            }
+            if (object instanceof Experiment) {
+                Experiment o = (Experiment) object;
+                return getStringKey(o.getId());
+            } else {
+                throw new IllegalArgumentException("Object " + object + " is of type " + object.getClass().getName() + "; expected type: " + Experiment.class.getName());
+            }
+        }
+
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/portal/controllers/ExperimentRoleTypeController.java

+package gov.anl.aps.dm.portal.controllers;
+
+import gov.anl.aps.dm.portal.model.beans.ExperimentRoleTypeDbFacade;
+import gov.anl.aps.dm.portal.model.entities.ExperimentRoleType;
+import javax.ejb.EJB;
+import javax.inject.Named;
+import javax.enterprise.context.SessionScoped;
+import javax.faces.component.UIComponent;
+import javax.faces.context.FacesContext;
+import javax.faces.convert.Converter;
+import javax.faces.convert.FacesConverter;
+import org.apache.log4j.Logger;
+
+@Named("experimentRoleTypeController")
+@SessionScoped
+public class ExperimentRoleTypeController extends DmEntityController<ExperimentRoleType, ExperimentRoleTypeDbFacade> {
+
+    private static final Logger logger = Logger.getLogger(ExperimentRoleTypeController.class.getName());
+
+    @EJB
+    private ExperimentRoleTypeDbFacade experimentRoleTypeDbFacade;
+
+    public ExperimentRoleTypeController() {
+    }
+
+    @Override
+    protected ExperimentRoleTypeDbFacade getFacade() {
+        return experimentRoleTypeDbFacade;
+    }
+
+    @Override
+    protected ExperimentRoleType createEntityInstance() {
+        return new ExperimentRoleType();
+    }
+
+    @Override
+    public String getEntityTypeName() {
+        return "experimentRoleType";
+    }
+
+    @Override
+    public String getCurrentEntityInstanceName() {
+        if (getCurrent() != null) {
+            return getCurrent().getName();
+        }
+        return "";
+    }
+
+    @Override
+    public ExperimentRoleType findById(Integer id) {
+        return experimentRoleTypeDbFacade.findById(id);
+    }
+    
+    @FacesConverter(forClass = ExperimentRoleType.class)
+    public static class ExperimentRoleTypeControllerConverter implements Converter {
+
+        @Override
+        public Object getAsObject(FacesContext facesContext, UIComponent component, String value) {
+            if (value == null || value.length() == 0) {
+                return null;
+            }
+            ExperimentRoleTypeController controller = (ExperimentRoleTypeController) facesContext.getApplication().getELResolver().
+                    getValue(facesContext.getELContext(), null, "experimentRoleTypeController");
+            return controller.getEntity(getKey(value));
+        }
+
+        java.lang.Integer getKey(String value) {
+            java.lang.Integer key;
+            key = Integer.valueOf(value);
+            return key;
+        }
+
+        String getStringKey(java.lang.Integer value) {
+            StringBuilder sb = new StringBuilder();
+            sb.append(value);
+            return sb.toString();
+        }
+
+        @Override
+        public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
+            if (object == null) {
+                return null;
+            }
+            if (object instanceof ExperimentRoleType) {
+                ExperimentRoleType o = (ExperimentRoleType) object;
+                return getStringKey(o.getId());
+            } else {
+                throw new IllegalArgumentException("Object " + object + " is of type " + object.getClass().getName() + "; expected type: " + ExperimentRoleType.class.getName());
+            }
+        }
+
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/portal/controllers/ExperimentStationController.java

+package gov.anl.aps.dm.portal.controllers;
+
+import gov.anl.aps.dm.common.exceptions.DmException;
+import gov.anl.aps.dm.common.exceptions.InvalidRequest;
+import gov.anl.aps.dm.common.exceptions.ObjectAlreadyExists;
+import gov.anl.aps.dm.portal.model.beans.ExperimentStationDbFacade;
+import gov.anl.aps.dm.portal.model.beans.SystemRoleTypeDbFacade;
+import gov.anl.aps.dm.portal.model.beans.UserSystemRoleDbFacade;
+import gov.anl.aps.dm.portal.model.entities.ExperimentStation;
+import gov.anl.aps.dm.portal.model.entities.SystemRoleType;
+import gov.anl.aps.dm.portal.model.entities.UserInfo;
+import gov.anl.aps.dm.portal.model.entities.UserSystemRole;
+import gov.anl.aps.dm.portal.model.entities.UserSystemRolePK;
+import gov.anl.aps.dm.portal.utilities.AuthorizationUtility;
+import gov.anl.aps.dm.portal.utilities.SessionUtility;
+import java.util.ArrayList;
+import java.util.List;
+import javax.ejb.EJB;
+import javax.inject.Named;
+import javax.enterprise.context.SessionScoped;
+import javax.faces.component.UIComponent;
+import javax.faces.context.FacesContext;
+import javax.faces.convert.Converter;
+import javax.faces.convert.FacesConverter;
+import org.apache.log4j.Logger;
+
+@Named("experimentStationController")
+@SessionScoped
+public class ExperimentStationController extends DmEntityController<ExperimentStation, ExperimentStationDbFacade> {
+
+    private static final Logger logger = Logger.getLogger(ExperimentStationController.class.getName());
+
+    @EJB
+    private ExperimentStationDbFacade experimentStationDbFacade;
+    @EJB
+    private SystemRoleTypeDbFacade systemRoleTypeDbFacade;
+    @EJB
+    private UserSystemRoleDbFacade userSystemRoleDbFacade;
+     
+    UserSystemRole currentUserSystemRole;
+
+    public ExperimentStationController() {
+    }
+
+    @Override
+    protected ExperimentStationDbFacade getFacade() {
+        return experimentStationDbFacade;
+    }
+
+    @Override
+    protected ExperimentStation createEntityInstance() {
+        return new ExperimentStation();
+    }
+
+    @Override
+    public String getEntityTypeName() {
+        return "experimentStation";
+    }
+
+    @Override
+    public String getCurrentEntityInstanceName() {
+        if (getCurrent() != null) {
+            return getCurrent().getName();
+        }
+        return "";
+    }
+
+    @Override
+    public ExperimentStation findById(Integer id) {
+        return experimentStationDbFacade.findById(id);
+    }
+
+    @Override
+    public void prepareEntityInsert(ExperimentStation experimentStation) throws DmException {
+        if ((experimentStation.getName() == null) || (experimentStation.getName().length() == 0)) {
+            throw new InvalidRequest("Experiment station name is missing.");
+        }
+        ExperimentStation existingExperimentStation = experimentStationDbFacade.findByName(experimentStation.getName());
+        if (existingExperimentStation != null) {
+            throw new ObjectAlreadyExists("Experiment station " + experimentStation.getName() + " already exists.");
+        }
+        logger.debug("Inserting new experiment station " + experimentStation.getName());
+    }
+
+    @Override
+    public void prepareEntityUpdate(ExperimentStation experimentStation) throws DmException {
+        if ((experimentStation.getName() == null) || (experimentStation.getName().length() == 0)) {
+            throw new InvalidRequest("Experiment station name is missing.");
+        }
+        logger.debug("Updating experiment station " + experimentStation.getName());
+    }
+
+    @Override
+    protected String getObjectAlreadyExistMessage(ExperimentStation experimentStation) {
+        if (experimentStation == null) {
+            return null;
+        }
+        return "Experiment station " + experimentStation.getName() + " already exists.";
+    }
+
+    public List<ExperimentStation> getAvailableExperimentStations() {
+        UserInfo user = (UserInfo) SessionUtility.getUser();
+        if (AuthorizationUtility.isAdministrator(user)) {
+            return getFacade().findAll();
+        }
+        ArrayList<ExperimentStation> availableStations = new ArrayList<>();
+        user.getUserSystemRoleList().stream().map((userSystemRole) -> userSystemRole.getExperimentStation()).filter((experimentStation) -> (experimentStation != null)).forEachOrdered((experimentStation) -> {
+            availableStations.add(experimentStation);
+        });
+        return availableStations;
+    }
+
+    public UserSystemRole getCurrentUserSystemRole() {
+        if (currentUserSystemRole == null) {
+            currentUserSystemRole = new UserSystemRole();
+        }
+        return currentUserSystemRole;
+    }
+
+    public void setCurrentUserSystemRole(UserSystemRole currentUserSystemRole) {
+        this.currentUserSystemRole = currentUserSystemRole;
+    }
+
+    public void prepareAddManager(ExperimentStation experimentStation) {
+        UserSystemRole userSystemRole = getCurrentUserSystemRole();
+        userSystemRole.setSystemRoleType(systemRoleTypeDbFacade.findManagerRoleType());
+        userSystemRole.setExperimentStation(experimentStation);
+    }
+
+    public void addManager() {
+        UserInfo user = currentUserSystemRole.getUserInfo();
+        ExperimentStation experimentStation = currentUserSystemRole.getExperimentStation();
+        SystemRoleType roleType = currentUserSystemRole.getSystemRoleType();
+        UserSystemRolePK userSystemRolePK = new UserSystemRolePK();
+        userSystemRolePK.setUserId(user.getId());
+        userSystemRolePK.setRoleTypeId(roleType.getId());
+        currentUserSystemRole.setUserSystemRolePK(userSystemRolePK);
+
+        UserSystemRole existingRole = userSystemRoleDbFacade.findByUserAndRoleTypeAndExperimentStation(user.getId(),
+                roleType.getId(), experimentStation.getId());
+        if (existingRole != null) {
+            SessionUtility.addErrorMessage("Error", "Could not add station manager: User "
+                    + user.getUsername()
+                    + " is already as manager of "
+                    + experimentStation.getName() + " station.");
+            return;
+        }
+        List<UserSystemRole> userSystemRoleList = experimentStation.getUserSystemRoleList();
+        userSystemRoleList.add(0, currentUserSystemRole);
+        update();
+        currentUserSystemRole = null;
+    }
+
+    public void deleteManager(UserSystemRole userSystemRole) {
+        ExperimentStation experimentStation = getCurrent();
+        userSystemRoleDbFacade.remove(userSystemRole);
+        List<UserSystemRole> userSystemRoleList = experimentStation.getUserSystemRoleList();
+        userSystemRoleList.remove(userSystemRole);
+        updateOnRemoval();
+    }
+
+    @FacesConverter(forClass = ExperimentStation.class)
+    public static class ExperimentStationControllerConverter implements Converter {
+
+        @Override
+        public Object getAsObject(FacesContext facesContext, UIComponent component, String value) {
+            if (value == null || value.length() == 0) {
+                return null;
+            }
+            ExperimentStationController controller = (ExperimentStationController) facesContext.getApplication().getELResolver().
+                    getValue(facesContext.getELContext(), null, "experimentStationController");
+            return controller.getEntity(getKey(value));
+        }
+
+        java.lang.Integer getKey(String value) {
+            java.lang.Integer key;
+            key = Integer.valueOf(value);
+            return key;
+        }
+
+        String getStringKey(java.lang.Integer value) {
+            StringBuilder sb = new StringBuilder();
+            sb.append(value);
+            return sb.toString();
+        }
+
+        @Override
+        public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
+            if (object == null) {
+                return null;
+            }
+            if (object instanceof ExperimentStation) {
+                ExperimentStation o = (ExperimentStation) object;
+                return getStringKey(o.getId());
+            } else {
+                throw new IllegalArgumentException("Object " + object + " is of type " + object.getClass().getName() + "; expected type: " + ExperimentStation.class.getName());
+            }
+        }
+
+    }
+
+}

src/java/DmWebPortal/src/java/gov/anl/aps/dm/portal/controllers/ExperimentTypeController.java

+package gov.anl.aps.dm.portal.controllers;
+
+import gov.anl.aps.dm.common.exceptions.DmException;
+import gov.anl.aps.dm.common.exceptions.InvalidRequest;
+import gov.anl.aps.dm.common.exceptions.ObjectAlreadyExists;
+import gov.anl.aps.dm.portal.model.beans.ExperimentTypeDbFacade;
+import gov.anl.aps.dm.portal.model.entities.ExperimentType;
+import javax.ejb.EJB;
+import javax.inject.Named;
+import javax.enterprise.context.SessionScoped;
+import javax.faces.component.UIComponent;
+import javax.faces.context.FacesContext;
+import javax.faces.convert.Converter;
+import javax.faces.convert.FacesConverter;
+import org.apache.log4j.Logger;
+
+@Named("experimentTypeController")
+@SessionScoped
+public class ExperimentTypeController extends DmEntityController<ExperimentType, ExperimentTypeDbFacade> {
+
+    private static final Logger logger = Logger.getLogger(ExperimentTypeController.class.getName());
+
+    @EJB
+    private ExperimentTypeDbFacade experimentTypeDbFacade;
+
+    public ExperimentTypeController() {
+    }
+
+    @Override
+    protected ExperimentTypeDbFacade getFacade() {
+        return experimentTypeDbFacade;
+    }
+
+    @Override
+    protected ExperimentType createEntityInstance() {
+        return new ExperimentType();
+    }
+
+    @Override
+    public String getEntityTypeName() {
+        return "experimentType";
+    }
+
+    @Override
+    public String getCurrentEntityInstanceName() {
+        if (getCurrent() != null) {
+            return getCurrent().getName();
+        }
+        return "";
+    }
+
+    @Override
+    public ExperimentType findById(Integer id) {
+        return experimentTypeDbFacade.findById(id);
+    }
+    
+    @Override
+    public void prepareEntityInsert(ExperimentType experimentType) throws DmException {
+        if ((experimentType.getName() == null) || (experimentType.getName().length() == 0)) {
+            throw new InvalidRequest("Experiment type name is missing.");
+        }
+        ExperimentType existingExperimentType = experimentTypeDbFacade.findByName(experimentType.getName());
+        if (existingExperimentType != null) {
+            throw new ObjectAlreadyExists("Experiment type " + experimentType.getName() + " already exists.");
+        }
+        logger.debug("Inserting new experiment type " + experimentType.getName());
+    }
+
+    @Override
+    public void prepareEntityUpdate(ExperimentType experimentType) throws DmException {
+        if ((experimentType.getName() == null) || (experimentType.getName().length() == 0)) {
+            throw new InvalidRequest("Experiment type name is missing.");
+        }
+        logger.debug("Updating experiment type " + experimentType.getName());
+    }
+
+    @Override
+    protected String getObjectAlreadyExistMessage(ExperimentType experimentType) {
+        if (experimentType == null) {
+            return null;
+        }
+        return "Experiment type " + experimentType.getName() + " already exists.";
+    }
+
+    @FacesConverter(forClass = ExperimentType.class)
+    public static class ExperimentTypeControllerConverter implements Converter {
+
+        @Override
+        public Object getAsObject(FacesContext facesContext, UIComponent component, String value) {
+            if (value == null || value.length() == 0) {
+                return null;
+            }
+            ExperimentTypeController controller = (ExperimentTypeController) facesContext.getApplication().getELResolver().
+                    getValue(facesContext.getELContext(), null, "experimentTypeController");
+            return controller.getEntity(getKey(value));
+        }
+
+        java.lang.Integer getKey(String value) {
+            java.lang.Integer key;
+            key = Integer.valueOf(value);
+            return key;
+        }
+
+        String getStringKey(java.lang.Integer value) {
+            StringBuilder sb = new StringBuilder();
+            sb.append(value);
+            return sb.toString();
+        }
+
+        @Override
+        public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
+            if (object == null) {
+                return null;
+            }
+            if (object instanceof ExperimentType) {
+                ExperimentType o = (ExperimentType) object;
+                return getStringKey(o.getId());
+            } else {
+                throw new IllegalArgumentException("Object " + object + " is of type " + object.getClass().getName() + "; expected type: " + ExperimentType.class.getName());
+            }
+        }
+
+    }
+
+}