/**
    * Copyright 2005-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.rice.krad.lookup;
  
  import org.apache.commons.beanutils.PropertyUtils;
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.CoreApiServiceLocator;
  import org.kuali.rice.core.api.encryption.EncryptionService;
  import org.kuali.rice.core.api.search.SearchOperator;
  import org.kuali.rice.coreservice.framework.CoreFrameworkServiceLocator;
  import org.kuali.rice.krad.bo.ExternalizableBusinessObject;
  import org.kuali.rice.krad.data.KradDataServiceLocator;
  import org.kuali.rice.krad.datadictionary.RelationshipDefinition;
  import org.kuali.rice.krad.datadictionary.exception.UnknownBusinessClassAttributeException;
  import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
  import org.kuali.rice.krad.service.ModuleService;
  import org.kuali.rice.krad.uif.UifConstants;
  import org.kuali.rice.krad.uif.UifPropertyPaths;
  import org.kuali.rice.krad.uif.lifecycle.ComponentPostMetadata;
  import org.kuali.rice.krad.uif.lifecycle.ViewPostMetadata;
  import org.kuali.rice.krad.uif.util.ObjectPropertyUtils;
  import org.kuali.rice.krad.util.ExternalizableBusinessObjectUtils;
  import org.kuali.rice.krad.util.KRADConstants;
  import org.kuali.rice.krad.util.KRADPropertyConstants;
  import org.kuali.rice.krad.util.KRADUtils;
  import org.kuali.rice.krad.web.form.UifFormBase;
  import org.springframework.beans.PropertyAccessorUtils;
  
  import javax.servlet.http.HttpServletRequest;
  
  import java.security.GeneralSecurityException;
  import java.sql.Date;
  import java.sql.Timestamp;
  import java.text.ParseException;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * Provides static utility methods for use within the lookup framework.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class LookupUtils {
      private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(LookupUtils.class);
      private static final String[] searchList = new String[SearchOperator.QUERY_CHARACTERS.size()];
  
      static {
          int index = 0;
          for (SearchOperator operator : SearchOperator.QUERY_CHARACTERS) {
              searchList[index++] = operator.op();
          }
      }
  
      private static final String[] replacementList = Collections.nCopies(searchList.length, "").toArray(new String[0]);
  
      private LookupUtils() {}
  
      /**
       * Retrieves the value for the given parameter name to send as a lookup parameter.
       *
       * @param form form instance to retrieve values from
       * @param request request object to retrieve parameters from
       * @param lookupObjectClass data object class associated with the lookup, used to check whether the
       * value needs to be encyrpted
       * @param propertyName name of the property associated with the parameter, used to check whether the
       * value needs to be encrypted
       * @param parameterName name of the parameter to retrieve the value for
       * @return String parameter value or empty string if no value was found
       */
      public static String retrieveLookupParameterValue(UifFormBase form, HttpServletRequest request,
              Class<?> lookupObjectClass, String propertyName, String parameterName) {
          String parameterValue = "";
  
          // get literal parameter values first
          if (StringUtils.startsWith(parameterName, "'") && StringUtils.endsWith(parameterName, "'")) {
              parameterValue = StringUtils.substringBetween(parameterName, "'");
          } else if (parameterValue.startsWith(KRADConstants.LOOKUP_PARAMETER_LITERAL_PREFIX
                  + KRADConstants.LOOKUP_PARAMETER_LITERAL_DELIMITER)) {
              parameterValue = StringUtils.removeStart(parameterValue, KRADConstants.LOOKUP_PARAMETER_LITERAL_PREFIX
                      + KRADConstants.LOOKUP_PARAMETER_LITERAL_DELIMITER);
         }
         // check if parameter is in request
         else if (request.getParameterMap().containsKey(parameterName)) {
             parameterValue = request.getParameter(parameterName);
         }
         // get parameter value from form object
         else {
             parameterValue = ObjectPropertyUtils.getPropertyValue(form, parameterName);
             // TODO: should go through property editor for display
         }
 
         if (parameterValue != null && lookupObjectClass != null
                 && KRADServiceLocatorWeb.getDataObjectAuthorizationService()
                 .attributeValueNeedsToBeEncryptedOnFormsAndLinks(lookupObjectClass, propertyName)) {
             try {
                 if (CoreApiServiceLocator.getEncryptionService().isEnabled()) {
                     parameterValue = CoreApiServiceLocator.getEncryptionService().encrypt(parameterValue)
                             + EncryptionService.ENCRYPTION_POST_PREFIX;
                 }
             } catch (GeneralSecurityException e) {
                 LOG.error("Unable to encrypt value for property name: " + propertyName);
                 throw new RuntimeException(e);
             }
         }
 
         return parameterValue;
     }
 
     /**
      * Retrieves the default KRAD base lookup URL, used to build lookup URLs in code
      *
      * @return String base lookup URL (everything except query string)
      */
     public static String getBaseLookupUrl() {
         return CoreApiServiceLocator.getKualiConfigurationService().getPropertyValueAsString(
                 KRADConstants.KRAD_LOOKUP_URL_KEY);
     }
 
     /**
      * Uses the DataDictionary to determine whether to force uppercase the value, and if it should, then it does the
      * uppercase, and returns the upper-cased value.
      *
      * @param dataObjectClass parent DO class that the fieldName is a member of
      * @param fieldName name of the field to be forced to uppercase
      * @param fieldValue value of the field that may be uppercased
      * @return the correctly uppercased fieldValue if it should be uppercased, otherwise fieldValue is returned
      *         unchanged
      */
     public static String forceUppercase(Class<?> dataObjectClass, String fieldName, String fieldValue) {
         // short-circuit to exit if there isnt enough information to do the forceUppercase
         if (StringUtils.isBlank(fieldValue)) {
             return fieldValue;
         }
 
         // parameter validation
         if (dataObjectClass == null) {
             throw new IllegalArgumentException("Parameter dataObjectClass passed in with null value.");
         }
 
         if (StringUtils.isBlank(fieldName)) {
             throw new IllegalArgumentException("Parameter fieldName passed in with empty value.");
         }
 
         if (!KRADServiceLocatorWeb.getDataDictionaryService().isAttributeDefined(dataObjectClass, fieldName)
                 .booleanValue()) {
             return fieldValue;
         }
 
         boolean forceUpperCase = false;
         try {
             forceUpperCase = KRADServiceLocatorWeb.getDataDictionaryService()
                     .getAttributeForceUppercase(dataObjectClass, fieldName).booleanValue();
         } catch (UnknownBusinessClassAttributeException ubae) {
             // do nothing, don't alter the fieldValue
         }
 
         if (forceUpperCase && !fieldValue.endsWith(EncryptionService.ENCRYPTION_POST_PREFIX)) {
             return fieldValue.toUpperCase();
         }
 
         return fieldValue;
     }
 
     /**
      * Uses the DataDictionary to determine whether to force uppercase the values, and if it should, then it does the
      * uppercase, and returns the upper-cased Map of fieldname/fieldValue pairs.
      *
      * @param dataObjectClass parent DO class that the fieldName is a member of
      * @param fieldValues a Map<String,String> where the key is the fieldName and the value is the fieldValue
      * @return the same Map is returned, with the appropriate values uppercased (if any)
      */
     public static Map<String, String> forceUppercase(Class<?> dataObjectClass, Map<String, String> fieldValues) {
         if (dataObjectClass == null) {
             throw new IllegalArgumentException("Parameter boClass passed in with null value.");
         }
 
         if (fieldValues == null) {
             throw new IllegalArgumentException("Parameter fieldValues passed in with null value.");
         }
 
         for (String fieldName : fieldValues.keySet()) {
             fieldValues.put(fieldName, forceUppercase(dataObjectClass, fieldName, fieldValues.get(fieldName)));
         }
 
         return fieldValues;
     }
 
     /**
      * Parses and returns the lookup result set limit, checking first for the limit for the specific view,
      * then the class being looked up, and then the global application limit if there isn't a limit specific
      * to this data object class.
      *
      * @param dataObjectClass class to get limit for
      * @param lookupForm lookupForm to use.  May be null if the form is unknown. If lookupForm is null, only the
      * dataObjectClass will be used to find the search results set limit
      * @return result set limit
      */
     public static Integer getSearchResultsLimit(Class dataObjectClass, LookupForm lookupForm) {
         Integer limit = KRADServiceLocatorWeb.getViewDictionaryService().getResultSetLimitForLookup(dataObjectClass,
                 lookupForm);
         if (limit == null) {
             limit = getApplicationSearchResultsLimit();
         }
 
         return limit;
     }
 
     /**
      * Retrieves the default application search limit configured through a system parameter.
      *
      * @return default result set limit of the application
      */
     public static Integer getApplicationSearchResultsLimit() {
         String limitString = CoreFrameworkServiceLocator.getParameterService()
                 .getParameterValueAsString(KRADConstants.KRAD_NAMESPACE,
                         KRADConstants.DetailTypes.LOOKUP_PARM_DETAIL_TYPE,
                         KRADConstants.SystemGroupParameterNames.LOOKUP_RESULTS_LIMIT);
         if (limitString != null) {
             return Integer.valueOf(limitString);
         }
 
         return null;
     }
 
     /**
      * Retrieves the default application multiple value search limit configured through a system parameter.
      *
      * @return default multiple value result set limit of the application
      */
     public static Integer getApplicationMultipleValueSearchResultsLimit() {
         String limitString = CoreFrameworkServiceLocator.getParameterService()
                 .getParameterValueAsString(KRADConstants.KRAD_NAMESPACE,
                         KRADConstants.DetailTypes.LOOKUP_PARM_DETAIL_TYPE,
                         KRADConstants.SystemGroupParameterNames.MULTIPLE_VALUE_LOOKUP_RESULTS_LIMIT);
         if (limitString != null) {
             return Integer.valueOf(limitString);
         }
 
         return null;
     }
 
     /**
      * Determines what Timestamp should be used for active queries on effective dated records. Determination made as
      * follows:
      *
      * <ul>
      * <li>Use activeAsOfDate value from search values Map if value is not empty</li>
      * <li>If search value given, try to convert to sql date, if conversion fails, try to convert to Timestamp</li>
      * <li>If search value empty, use current Date</li>
      * <li>If Timestamp value not given, create Timestamp from given Date setting the time as 1 second before midnight
      * </ul>
      *
      * @param searchValues map containing search key/value pairs
      * @return timestamp to be used for active criteria
      */
     public static Timestamp getActiveDateTimestampForCriteria(Map searchValues) {
         Date activeDate = CoreApiServiceLocator.getDateTimeService().getCurrentSqlDate();
 
         Timestamp activeTimestamp = null;
         if (searchValues.containsKey(KRADPropertyConstants.ACTIVE_AS_OF_DATE)) {
             String activeAsOfDate = (String) searchValues.get(KRADPropertyConstants.ACTIVE_AS_OF_DATE);
             if (StringUtils.isNotBlank(activeAsOfDate)) {
                 try {
                     activeDate = CoreApiServiceLocator.getDateTimeService()
                             .convertToSqlDate(KRADUtils.clean(activeAsOfDate));
                 } catch (ParseException e) {
                     // try to parse as timestamp
                     try {
                         activeTimestamp = CoreApiServiceLocator.getDateTimeService()
                                 .convertToSqlTimestamp(KRADUtils.clean(activeAsOfDate));
                     } catch (ParseException e1) {
                         throw new RuntimeException("Unable to convert date: " + KRADUtils.clean(activeAsOfDate));
                     }
                 }
             }
         }
 
         // if timestamp not given set to 1 second before midnight on the given date
         if (activeTimestamp == null) {
             Calendar cal = Calendar.getInstance();
 
             cal.setTime(activeDate);
             cal.set(Calendar.HOUR, cal.getMaximum(Calendar.HOUR));
             cal.set(Calendar.MINUTE, cal.getMaximum(Calendar.MINUTE));
             cal.set(Calendar.SECOND, cal.getMaximum(Calendar.SECOND));
 
             activeTimestamp = new Timestamp(cal.getTime().getTime());
         }
 
         return activeTimestamp;
     }
 
     /**
      * Changes from/to dates into the range operators the lookupable dao expects ("..",">" etc) this method modifies
      * the passed in map and returns an updated search criteria map.
      *
      * @param searchCriteria map of criteria currently set for which the date criteria will be adjusted
      * @return map updated search criteria
      */
     public static Map<String, String> preprocessDateFields(Map<String, String> searchCriteria) {
         Map<String, String> fieldsToUpdate = new HashMap<String, String>();
         Map<String, String> searchCriteriaUpdated = new HashMap<String, String>(searchCriteria);
 
         Set<String> fieldsForLookup = searchCriteria.keySet();
         for (String propName : fieldsForLookup) {
             if (propName.startsWith(KRADConstants.LOOKUP_RANGE_LOWER_BOUND_PROPERTY_PREFIX)) {
                 String from_DateValue = searchCriteria.get(propName);
                 String dateFieldName =
                         StringUtils.remove(propName, KRADConstants.LOOKUP_RANGE_LOWER_BOUND_PROPERTY_PREFIX);
                 String to_DateValue = searchCriteria.get(dateFieldName);
                 String newPropValue = to_DateValue;
 
                 if (StringUtils.isNotEmpty(from_DateValue) && StringUtils.isNotEmpty(to_DateValue)) {
                     newPropValue = from_DateValue + SearchOperator.BETWEEN + to_DateValue;
                 } else if (StringUtils.isNotEmpty(from_DateValue) && StringUtils.isEmpty(to_DateValue)) {
                     newPropValue = SearchOperator.GREATER_THAN_EQUAL.op() + from_DateValue;
                 } else if (StringUtils.isNotEmpty(to_DateValue) && StringUtils.isEmpty(from_DateValue)) {
                     newPropValue = SearchOperator.LESS_THAN_EQUAL.op() + to_DateValue;
                 } // could optionally continue on else here
 
                 fieldsToUpdate.put(dateFieldName, newPropValue);
             }
         }
 
         // update lookup values from found date values to update
         Set<String> keysToUpdate = fieldsToUpdate.keySet();
         for (String updateKey : keysToUpdate) {
             searchCriteriaUpdated.put(updateKey, fieldsToUpdate.get(updateKey));
         }
 
         return searchCriteriaUpdated;
     }
 
     /**
      * Checks whether any of the fieldValues being passed refer to a property within an ExternalizableBusinessObject.
      *
      * @param boClass business object class of the lookup
      * @param fieldValues map of the lookup criteria values
      * @return true if externalizable business object are contained, false otherwise
      * @throws IllegalAccessException
      * @throws InstantiationException
      */
     public static boolean hasExternalBusinessObjectProperty(Class<?> boClass,
             Map<String, String> fieldValues) throws IllegalAccessException, InstantiationException {
         Object sampleBo = boClass.newInstance();
         for (String key : fieldValues.keySet()) {
             if (isExternalBusinessObjectProperty(sampleBo, key)) {
                 return true;
             }
         }
 
         return false;
     }
 
     /**
      * Check whether the given property represents a property within an EBO starting with the sampleBo object given.
      * This is used to determine if a criteria needs to be applied to the EBO first,
      * before sending to the normal lookup DAO.
      *
      * @param sampleBo business object of the property to be tested
      * @param propertyName property name to be tested
      * @return true if the property is within an externalizable business object.
      */
     public static boolean isExternalBusinessObjectProperty(Object sampleBo, String propertyName) {
         if (propertyName.indexOf(".") > 0 && !StringUtils.contains(propertyName, "add.")) {
             Class<?> propertyClass =
                     ObjectPropertyUtils.getPropertyType(sampleBo, StringUtils.substringBeforeLast(propertyName, "."));
             if (propertyClass != null) {
                 return ExternalizableBusinessObjectUtils.isExternalizableBusinessObjectInterface(propertyClass);
             }
         }
 
         return false;
     }
 
     /**
      * Returns a map stripped of any properties which refer to ExternalizableBusinessObjects. These values may not be
      * passed into the lookup service, since the objects they refer to are not in the
      * local database.
      *
      * @param boClass business object class of the lookup
      * @param fieldValues map of lookup criteria from which to remove the externalizable business objects
      * @return map of lookup criteria without externalizable business objects
      */
     public static Map<String, String> removeExternalizableBusinessObjectFieldValues(Class<?> boClass,
             Map<String, String> fieldValues) throws IllegalAccessException, InstantiationException {
         Map<String, String> eboFieldValues = new HashMap<String, String>();
         Object sampleBo = boClass.newInstance();
         for (String key : fieldValues.keySet()) {
             if (!isExternalBusinessObjectProperty(sampleBo, key)) {
                 eboFieldValues.put(key, fieldValues.get(key));
             }
         }
 
         return eboFieldValues;
     }
 
     /**
      * Return the EBO fieldValue entries explicitly for the given eboPropertyName. (I.e., any properties with the given
      * property name as a prefix.
      *
      * @param eboPropertyName the externalizable business object property name to retrieve
      * @param fieldValues map of lookup criteria
      * return map of lookup criteria for the given eboPropertyName
      */
     public static Map<String, String> getExternalizableBusinessObjectFieldValues(String eboPropertyName,
             Map<String, String> fieldValues) {
         Map<String, String> eboFieldValues = new HashMap<String, String>();
         for (String key : fieldValues.keySet()) {
             if (key.startsWith(eboPropertyName + ".")) {
                 eboFieldValues.put(StringUtils.substringAfterLast(key, "."), fieldValues.get(key));
             }
         }
 
         return eboFieldValues;
     }
 
     /**
      * Get the complete list of all properties referenced in the fieldValues that are ExternalizableBusinessObjects.
      *
      * <p>
      * This is a list of the EBO object references themselves, not of the properties within them.
      * </p>
      *
      * @param boClass business object class of the lookup
      * @param fieldValues map of lookup criteria from which to return the externalizable business objects
      * @return map of lookup criteria that are externalizable business objects
      * @throws IllegalAccessException
      * @throws InstantiationException
      */
     public static List<String> getExternalizableBusinessObjectProperties(Class<?> boClass,
             Map<String, String> fieldValues) throws IllegalAccessException, InstantiationException {
         Set<String> eboPropertyNames = new HashSet<String>();
 
         Object sampleBo = boClass.newInstance();
         for (String key : fieldValues.keySet()) {
             if (isExternalBusinessObjectProperty(sampleBo, key)) {
                 eboPropertyNames.add(StringUtils.substringBeforeLast(key, "."));
             }
         }
 
         return new ArrayList<String>(eboPropertyNames);
     }
 
     /**
      * Given an property on the main BO class, return the defined type of the ExternalizableBusinessObject. This will
      * be used by other code to determine the correct module service to call for the lookup.
      *
      * @param boClass business object class of the lookup
      * @param propertyName property of which the externalizable business object type is to be determined
      * @return externalizable business object type
      * @throws IllegalAccessException
      * @throws InstantiationException
      */
     public static Class<? extends ExternalizableBusinessObject> getExternalizableBusinessObjectClass(Class<?> boClass,
             String propertyName) throws IllegalAccessException, InstantiationException {
         return (Class<? extends ExternalizableBusinessObject>) ObjectPropertyUtils
                 .getPropertyType(boClass.newInstance(), StringUtils.substringBeforeLast(propertyName, "."));
     }
 
     /**
      * Looks for criteria against nested EBOs and performs a search against that EBO and updates the criteria.
      *
      * @param searchCriteria map of criteria currently set
      * @param unbounded indicates whether the complete result should be returned.  When set to false the result is
      * limited (if necessary) to the max search result limit configured.
      * @return Map of adjusted criteria for nested EBOs
      * @throws InstantiationException
      * @throws IllegalAccessException
      */
     public static Map<String, String> adjustCriteriaForNestedEBOs(Class<?> dataObjectClass,
             Map<String, String> searchCriteria,
             boolean unbounded) throws InstantiationException, IllegalAccessException {
         // remove the EBO criteria
         Map<String, String> nonEboFieldValues = removeExternalizableBusinessObjectFieldValues(
                 dataObjectClass, searchCriteria);
         if (LOG.isDebugEnabled()) {
             LOG.debug("Non EBO properties removed: " + nonEboFieldValues);
         }
 
         // get the list of EBO properties attached to this object
         List<String> eboPropertyNames = getExternalizableBusinessObjectProperties(dataObjectClass, searchCriteria);
         if (LOG.isDebugEnabled()) {
             LOG.debug("EBO properties: " + eboPropertyNames);
         }
 
         // loop over those properties
         for (String eboPropertyName : eboPropertyNames) {
             // extract the properties as known to the EBO
             Map<String, String> eboFieldValues = LookupUtils.getExternalizableBusinessObjectFieldValues(eboPropertyName,
                     searchCriteria);
             if (LOG.isDebugEnabled()) {
                 LOG.debug("EBO properties for master EBO property: " + eboPropertyName);
                 LOG.debug("properties: " + eboFieldValues);
             }
 
             // run search against attached EBO's module service
             ModuleService eboModuleService = KRADServiceLocatorWeb.getKualiModuleService().getResponsibleModuleService(
                     getExternalizableBusinessObjectClass(dataObjectClass, eboPropertyName));
 
             // KULRICE-4401 made eboResults an empty list and only filled if service is found.
             List<?> eboResults = Collections.emptyList();
             if (eboModuleService != null) {
                 eboResults = eboModuleService.getExternalizableBusinessObjectsListForLookup(
                         getExternalizableBusinessObjectClass(dataObjectClass, eboPropertyName),
                         (Map) eboFieldValues, unbounded);
             } else {
                 LOG.debug("EBO ModuleService is null: " + eboPropertyName);
             }
 
             // get the parent property type
             Class<?> eboParentClass;
             String eboParentPropertyName;
             if (PropertyAccessorUtils.isNestedOrIndexedProperty(eboPropertyName)) {
                 eboParentPropertyName = StringUtils.substringBeforeLast(eboPropertyName, ".");
                 try {
                     eboParentClass = KradDataServiceLocator.getDataObjectService().wrap(dataObjectClass.newInstance()).getPropertyType(
                             eboParentPropertyName);
                 } catch (Exception ex) {
                     throw new RuntimeException(
                             "Unable to create an instance of the business object class: " + dataObjectClass
                                     .getName(), ex);
                 }
             } else {
                 eboParentClass = dataObjectClass;
                 eboParentPropertyName = null;
             }
 
             if (LOG.isDebugEnabled()) {
                 LOG.debug("determined EBO parent class/property name: " + eboParentClass + "/" + eboParentPropertyName);
             }
 
             // look that up in the DD (BOMDS) find the appropriate relationship
             // CHECK THIS: what if eboPropertyName is a nested attribute - need to strip off the
             // eboParentPropertyName if not null
             RelationshipDefinition rd = KRADServiceLocatorWeb.getLegacyDataAdapter().getDictionaryRelationship(
                     eboParentClass, eboPropertyName);
             if (LOG.isDebugEnabled()) {
                 LOG.debug("Obtained RelationshipDefinition for " + eboPropertyName);
                 LOG.debug(rd);
             }
 
             // copy the needed properties (primary only) to the field values KULRICE-4446 do
             // so only if the relationship definition exists
             // NOTE: this will work only for single-field PK unless the ORM
             // layer is directly involved
             // (can't make (field1,field2) in ( (v1,v2),(v3,v4) ) style
             // queries in the lookup framework
             if (KRADUtils.isNotNull(rd)) {
                 if (rd.getPrimitiveAttributes().size() > 1) {
                     throw new RuntimeException(
                             "EBO Links don't work for relationships with multiple-field primary keys.");
                 }
                 String boProperty = rd.getPrimitiveAttributes().get(0).getSourceName();
                 String eboProperty = rd.getPrimitiveAttributes().get(0).getTargetName();
                 StringBuffer boPropertyValue = new StringBuffer();
 
                 // loop over the results, making a string that the lookup DAO will convert into an
                 // SQL "IN" clause
                 for (Object ebo : eboResults) {
                     if (boPropertyValue.length() != 0) {
                         boPropertyValue.append(SearchOperator.OR.op());
                     }
                     try {
                         boPropertyValue.append(PropertyUtils.getProperty(ebo, eboProperty).toString());
                     } catch (Exception ex) {
                         LOG.warn("Unable to get value for " + eboProperty + " on " + ebo);
                     }
                 }
 
                 if (eboParentPropertyName == null) {
                     // non-nested property containing the EBO
                     nonEboFieldValues.put(boProperty, boPropertyValue.toString());
                 } else {
                     // property nested within the main searched-for BO that contains the EBO
                     nonEboFieldValues.put(eboParentPropertyName + "." + boProperty, boPropertyValue.toString());
                 }
             }
         }
 
         return nonEboFieldValues;
     }
 
     /**
      * Removes query characters (such as wildcards) from the given string value.
      *
      * @param criteriaValue string to clean
      * @return string with query characters removed
      */
     public static String scrubQueryCharacters(String criteriaValue) {
         return StringUtils.replaceEach(criteriaValue, searchList, replacementList);
     }
 
     /**
      * Generates a key string in case of multivalue return. The values are extracted
      * from the list of properties on the lineDataObject.
      *
      * If fieldConversionKeys is empty return the identifier string for the lineDataObject
      *
      * @param lineDataObject   Object from which to extract values
      * @param fieldConversionKeys List of keys whose values have to be concatenated
      * @return string representing the multivalue key 
      */
     public static String generateMultiValueKey(Object lineDataObject, List<String> fieldConversionKeys) {
         String lineIdentifier = "";
 
         if(fieldConversionKeys == null || fieldConversionKeys.isEmpty()) {
             lineIdentifier =
                     KRADServiceLocatorWeb.getLegacyDataAdapter().getDataObjectIdentifierString(lineDataObject);
         } else {
             Collections.sort(fieldConversionKeys);
             for (String fromFieldName : fieldConversionKeys) {
                 Object fromFieldValue = ObjectPropertyUtils.getPropertyValue(lineDataObject, fromFieldName);
 
                 if (fromFieldValue != null) {
                     lineIdentifier += fromFieldValue;
                 }
 
                 lineIdentifier += ":";
             }
             lineIdentifier = StringUtils.removeEnd(lineIdentifier, ":");
         }
 
         return lineIdentifier;
     }
 
     /**
      * Merges the lookup result selections that are part of the request with the selectedLookupResultsCache maintained in
      * the session.
      *
      * @param form lookup form instance containing the selected results and lookup configuration
      */
     public static void refreshLookupResultSelections(LookupForm form) {
 
         int displayStart = 0;
         int displayLength = 0;
 
         // avoid blowing the stack if the session expired
         ViewPostMetadata viewPostMetadata = form.getViewPostMetadata();
         if (viewPostMetadata != null) {
 
             // only one concurrent request per view please
             synchronized (viewPostMetadata) {
                 ComponentPostMetadata oldCollectionGroup = viewPostMetadata.getComponentPostMetadata("uLookupResults");
                 displayStart = (Integer) oldCollectionGroup.getData(UifConstants.PostMetadata.COLL_DISPLAY_START);
                 displayLength = (Integer) oldCollectionGroup.getData(UifConstants.PostMetadata.COLL_DISPLAY_LENGTH);
             }
         }
 
         List<? extends Object> lookupResults = (List<? extends Object>) form.getLookupResults();
         List<String> fromFieldNames = form.getMultiValueReturnFields();
 
         Set<String> selectedLines = form.getSelectedCollectionLines().get(UifPropertyPaths.LOOKUP_RESULTS);
         Set<String> selectedLookupResultsCache = form.getSelectedLookupResultsCache();
 
         selectedLines = (selectedLines == null) ? new HashSet<String>() : selectedLines;
 
 
         for(int i = displayStart; i < displayStart + displayLength; i++ ) {
             if(i >= form.getLookupResults().size()) break;
 
             Object lineItem = lookupResults.get(i);
             String lineIdentifier = LookupUtils.generateMultiValueKey(lineItem, fromFieldNames);
 
             if(!selectedLines.contains(lineIdentifier)) {
                  selectedLookupResultsCache.remove(lineIdentifier);
             } else {
                 selectedLookupResultsCache.add(lineIdentifier);
             }
         }
 
         selectedLines.addAll( selectedLookupResultsCache );
 
         form.getSelectedCollectionLines().put(UifPropertyPaths.LOOKUP_RESULTS, selectedLines);
     }
 
 }