/*

  * Copyright 2007 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.BooleanUtils;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.CoreApiServiceLocator;

 import org.kuali.rice.core.api.config.property.ConfigurationService;

 import org.kuali.rice.core.api.encryption.EncryptionService;

 import org.kuali.rice.core.api.search.SearchOperator;

 import org.kuali.rice.core.api.util.RiceKeyConstants;

 import org.kuali.rice.core.api.util.type.TypeUtils;

 import org.kuali.rice.kim.bo.Person;

 import org.kuali.rice.krad.bo.ExternalizableBusinessObject;

 import org.kuali.rice.krad.datadictionary.BusinessObjectEntry;

 import org.kuali.rice.krad.datadictionary.RelationshipDefinition;

 import org.kuali.rice.krad.service.DataObjectAuthorizationService;

 import org.kuali.rice.krad.service.DataObjectMetaDataService;

 import org.kuali.rice.krad.service.DocumentDictionaryService;

 import org.kuali.rice.krad.service.KRADServiceLocator;

 import org.kuali.rice.krad.service.KRADServiceLocatorWeb;

 import org.kuali.rice.krad.service.LookupService;

 import org.kuali.rice.krad.service.ModuleService;

 import org.kuali.rice.krad.uif.UifConstants;

 import org.kuali.rice.krad.uif.UifParameters;

 import org.kuali.rice.krad.uif.container.LookupView;

 import org.kuali.rice.krad.uif.container.View;

 import org.kuali.rice.krad.uif.control.HiddenControl;

 import org.kuali.rice.krad.uif.field.AttributeField;

 import org.kuali.rice.krad.uif.field.LinkField;

 import org.kuali.rice.krad.uif.field.LookupAttributeField;

 import org.kuali.rice.krad.uif.service.impl.ViewHelperServiceImpl;

 import org.kuali.rice.krad.uif.util.LookupInquiryUtils;

 import org.kuali.rice.krad.uif.util.ObjectPropertyUtils;

 import org.kuali.rice.krad.util.BeanPropertyComparator;

 import org.kuali.rice.krad.util.GlobalVariables;

 import org.kuali.rice.krad.util.KRADConstants;

 import org.kuali.rice.krad.util.KRADUtils;

 import org.kuali.rice.krad.util.ObjectUtils;

 import org.kuali.rice.krad.util.UrlFactory;

 import org.kuali.rice.krad.web.form.LookupForm;

 import java.security.GeneralSecurityException;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import java.util.Properties;

 /**

  * Default implementation of <code>Lookupable</code>

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class LookupableImpl extends ViewHelperServiceImpl implements Lookupable {

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(LookupableImpl.class);

     private Class<?> dataObjectClass;

     private Map<String, String> parameters;

     private List<String> defaultSortAttributeNames;

     // TODO delyea: where to take into account the sort ascending value (old KNS appeared to ignore?)

     private boolean sortAscending;

     private Map<String, String> fieldConversions;

     private List<String> readOnlyFieldsList;

     private transient ConfigurationService configurationService;

     private transient DataObjectAuthorizationService dataObjectAuthorizationService;

     private transient DataObjectMetaDataService dataObjectMetaDataService;

     private transient DocumentDictionaryService documentDictionaryService;

     private transient LookupService lookupService;

     private transient EncryptionService encryptionService;

     /**

      * @see org.kuali.rice.krad.uif.service.impl.ViewHelperServiceImpl#populateViewFromRequestParameters(org.kuali.rice.krad.uif.container.View,

      *      java.util.Map)

      */

     @Override

     public void populateViewFromRequestParameters(View view, Map<String, String> parameters) {

         super.populateViewFromRequestParameters(view, parameters);

         /* On the old Lookupable and LookupableHelperService in KNS the parameters list used to have multipart form

            * data in it where it may not in the new KRAD. See PojoFormBase.populate() method for more information

            */

         setParameters(parameters);

     }

     /**

      * Initialization of Lookupable requires that the business object class be set for the {@link

      * #initializeAttributeFieldFromDataDictionary(View, org.kuali.rice.krad.uif.field.AttributeField)} method

      *

      * @see org.kuali.rice.krad.uif.service.impl.ViewHelperServiceImpl#performInitialization(org.kuali.rice.krad.uif.container.View)

      */

     @Override

     public void performInitialization(View view) {

         if (!LookupView.class.isAssignableFrom(view.getClass())) {

             throw new IllegalArgumentException(

                     "View class '" + view.getClass() + " is not assignable from the '" + LookupView.class + "'");

         }

         LookupView lookupView = (LookupView) view;

         initializeLookupViewHelperService(lookupView);

         super.performInitialization(view);

     }

     /**

      * Initializes properties on this lookupable from the <code>LookupView</code>

      *

      * @param lookupView - lookup view instance

      */

     protected void initializeLookupViewHelperService(LookupView lookupView) {

         setDefaultSortAttributeNames(lookupView.getDefaultSortAttributeNames());

         setSortAscending(lookupView.isDefaultSortAscending());

         setDataObjectClass(lookupView.getDataObjectClassName());

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#performSearch

      */

     @Override

     public Collection<?> performSearch(LookupForm form, Map<String, String> searchCriteria, boolean bounded) {

         Collection<?> displayList;

         LookupUtils.preprocessDateFields(searchCriteria);

         // TODO: force uppercase will be done in binding at some point

         displayList =

                 getSearchResults(form, LookupUtils.forceUppercase(getDataObjectClass(), searchCriteria), !bounded);

         // TODO delyea - is this the best way to set that the entire set has a returnable row?

         List<String> pkNames = getDataObjectMetaDataService().listPrimaryKeyFieldNames(getDataObjectClass());

         Person user = GlobalVariables.getUserSession().getPerson();

         for (Object object : displayList) {

             if (isResultReturnable(object)) {

                 form.setAtLeastOneRowReturnable(true);

             }

         }

         return displayList;

     }

     protected List<?> getSearchResults(LookupForm form, Map<String, String> searchCriteria, boolean unbounded) {

         List<?> searchResults;

         // removed blank search values and decrypt any encrypted search values

         Map<String, String> nonBlankSearchCriteria = processSearchCriteria(form, searchCriteria);

         boolean searchUsingOnlyPrimaryKeyValues =

                 getLookupService().allPrimaryKeyValuesPresentAndNotWildcard(getDataObjectClass(), searchCriteria);

         // if this class is an EBO, just call the module service to get the results

         if (ExternalizableBusinessObject.class.isAssignableFrom(getDataObjectClass())) {

             return getSearchResultsForEBO(nonBlankSearchCriteria, unbounded);

         }

         // if any of the properties refer to an embedded EBO, call the EBO

         // lookups first and apply to the local lookup

         try {

             if (LookupUtils.hasExternalBusinessObjectProperty(getDataObjectClass(), nonBlankSearchCriteria)) {

                 Map<String, String> eboSearchCriteria = adjustCriteriaForNestedEBOs(nonBlankSearchCriteria, unbounded);

                 if (LOG.isDebugEnabled()) {

                     LOG.debug("Passing these results into the lookup service: " + eboSearchCriteria);

                 }

                 // add those results as criteria run the normal search (but with the EBO criteria added)

                 searchResults = (List<?>) getLookupService()

                         .findCollectionBySearchHelper(getDataObjectClass(), eboSearchCriteria, unbounded);

             } else {

                 searchResults = (List<?>) getLookupService()

                         .findCollectionBySearchHelper(getDataObjectClass(), nonBlankSearchCriteria, unbounded);

             }

         } catch (IllegalAccessException e) {

             LOG.error("Error trying to perform search", e);

             throw new RuntimeException("Error trying to perform search", e);

         } catch (InstantiationException e1) {

             LOG.error("Error trying to perform search", e1);

             throw new RuntimeException("Error trying to perform search", e1);

         }

         if (searchResults == null) {

             searchResults = new ArrayList<Object>();

         }

         // sort list if default sort column given

         List<String> defaultSortColumns = getDefaultSortAttributeNames();

         if ((defaultSortColumns != null) && (defaultSortColumns.size() > 0)) {

             Collections.sort(searchResults, new BeanPropertyComparator(defaultSortColumns, true));

         }

         return searchResults;

     }

     protected Map<String, String> processSearchCriteria(LookupForm lookupForm, Map<String, String> searchCriteria) {

         Map<String, String> nonBlankSearchCriteria = new HashMap<String, String>();

         for (String fieldName : searchCriteria.keySet()) {

             String fieldValue = searchCriteria.get(fieldName);

             // don't add hidden criteria

             LookupView lookupView = (LookupView) lookupForm.getView();

             AttributeField attributeField = lookupView.getViewIndex().getAttributeFieldByPropertyName(fieldName);

             if (attributeField.getControl() instanceof HiddenControl) {

                 continue;

             }

             // only add criteria if non blank

             if (StringUtils.isNotBlank(fieldValue)) {

                 if (fieldValue.endsWith(EncryptionService.ENCRYPTION_POST_PREFIX)) {

                     String encryptedValue = StringUtils.removeEnd(fieldValue, EncryptionService.ENCRYPTION_POST_PREFIX);

                     try {

                         fieldValue = getEncryptionService().decrypt(encryptedValue);

                     } catch (GeneralSecurityException e) {

                         LOG.error("Error decrypting value for business object class " + getDataObjectClass() +

                                 " attribute " + fieldName, e);

                         throw new RuntimeException(

                                 "Error decrypting value for business object class " + getDataObjectClass() +

                                         " attribute " + fieldName, e);

                     }

                 }

                 nonBlankSearchCriteria.put(fieldName, fieldValue);

             }

         }

         return nonBlankSearchCriteria;

     }

     protected List<?> getSearchResultsForEBO(Map<String, String> searchCriteria, boolean unbounded) {

         ModuleService eboModuleService =

                 KRADServiceLocatorWeb.getKualiModuleService().getResponsibleModuleService(getDataObjectClass());

         BusinessObjectEntry ddEntry =

                 eboModuleService.getExternalizableBusinessObjectDictionaryEntry(getDataObjectClass());

         Map<String, String> filteredFieldValues = new HashMap<String, String>();

         for (String fieldName : searchCriteria.keySet()) {

             if (ddEntry.getAttributeNames().contains(fieldName)) {

                 filteredFieldValues.put(fieldName, searchCriteria.get(fieldName));

             }

         }

         List<?> searchResults = eboModuleService.getExternalizableBusinessObjectsListForLookup(

                 (Class<? extends ExternalizableBusinessObject>) getDataObjectClass(), (Map) filteredFieldValues,

                 unbounded);

         return searchResults;

     }

     protected Map<String, String> adjustCriteriaForNestedEBOs(Map<String, String> searchCriteria,

             boolean unbounded) throws InstantiationException, IllegalAccessException {

         if (LOG.isDebugEnabled()) {

             LOG.debug("has EBO reference: " + getDataObjectClass());

             LOG.debug("properties: " + searchCriteria);

         }

         // remove the EBO criteria

         Map<String, String> nonEboFieldValues =

                 LookupUtils.removeExternalizableBusinessObjectFieldValues(getDataObjectClass(), searchCriteria);

         if (LOG.isDebugEnabled()) {

             LOG.debug("Non EBO properties removed: " + nonEboFieldValues);

         }

         // get the list of EBO properties attached to this object

         List<String> eboPropertyNames =

                 LookupUtils.getExternalizableBusinessObjectProperties(getDataObjectClass(), 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(

                     LookupUtils.getExternalizableBusinessObjectClass(getDataObjectClass(), 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(

                         LookupUtils.getExternalizableBusinessObjectClass(getDataObjectClass(), eboPropertyName),

                         (Map) eboFieldValues, unbounded);

             } else {

                 LOG.debug("EBO ModuleService is null: " + eboPropertyName);

             }

             // get the mapping/relationship between the EBO object and it's

             // parent object

             // use that to adjust the searchCriteria

             // get the parent property type

             Class<?> eboParentClass;

             String eboParentPropertyName;

             if (ObjectUtils.isNestedAttribute(eboPropertyName)) {

                 eboParentPropertyName = StringUtils.substringBeforeLast(eboPropertyName, ".");

                 try {

                     eboParentClass =

                             PropertyUtils.getPropertyType(getDataObjectClass().newInstance(), eboParentPropertyName);

                 } catch (Exception ex) {

                     throw new RuntimeException("Unable to create an instance of the business object class: " +

                             getDataObjectClass().getName(), ex);

                 }

             } else {

                 eboParentClass = getDataObjectClass();

                 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 =

                     getDataObjectMetaDataService().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 (ObjectUtils.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;

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#performClear

      */

     @Override

     public Map<String, String> performClear(LookupForm form, Map<String, String> searchCriteria) {

         Map<String, String> clearedSearchCriteria = new HashMap<String, String>();

         for (Map.Entry<String, String> searchKeyValue : searchCriteria.entrySet()) {

             String searchPropertyName = searchKeyValue.getKey();

             String searchPropertyValue = searchKeyValue.getValue();

             LookupView lookupView = (LookupView) form.getView();

             AttributeField attributeField =

                     lookupView.getViewIndex().getAttributeFieldByPropertyName(searchPropertyName);

             if (attributeField != null) {

                 // TODO: check secure fields

 //                                if (field.isSecure()) {

 //                    field.setSecure(false);

 //                    field.setDisplayMaskValue(null);

 //                    field.setEncryptedValue(null);

 //                }

                 // TODO: need formatting on default value and make sure it works when control converts

                 // from checkbox to radio

                 clearedSearchCriteria.put(searchPropertyName, attributeField.getDefaultValue());

             } else {

                 throw new RuntimeException("Invalid search field sent for property name: " + searchPropertyName);

             }

         }

         return clearedSearchCriteria;

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#validateSearchParameters

      */

     @Override

     public boolean validateSearchParameters(LookupForm form, Map<String, String> searchCriteria) {

         boolean valid = true;

         if (!getViewDictionaryService().isLookupable(getDataObjectClass())) {

             throw new RuntimeException("Lookup not defined for data object " + getDataObjectClass());

         }

         // validate required

         // TODO: this will be done by the uif validation service at some point

         for (Map.Entry<String, String> searchKeyValue : searchCriteria.entrySet()) {

             String searchPropertyName = searchKeyValue.getKey();

             String searchPropertyValue = searchKeyValue.getValue();

             LookupView lookupView = (LookupView) form.getView();

             AttributeField attributeField =

                     lookupView.getViewIndex().getAttributeFieldByPropertyName(searchPropertyName);

             if (attributeField != null) {

                 if (StringUtils.isBlank(searchPropertyValue) && BooleanUtils.isTrue(attributeField.getRequired())) {

                     GlobalVariables.getMessageMap()

                             .putError(attributeField.getPropertyName(), RiceKeyConstants.ERROR_REQUIRED,

                                     attributeField.getLabel());

                 }

                 validateSearchParameterWildcardAndOperators(attributeField, searchPropertyValue);

             } else {

                 throw new RuntimeException("Invalid search field sent for property name: " + searchPropertyName);

             }

         }

         if (GlobalVariables.getMessageMap().hasErrors()) {

             valid = false;

         }

         return valid;

     }

     /**

      * Validates that any wildcards contained within the search value are valid wilcards and allowed for the

      * property type for which the field is searching

      *

      * @param attributeField - attribute field instance for the field that is being searched

      * @param searchPropertyValue - value given for field to search for

      */

     protected void validateSearchParameterWildcardAndOperators(AttributeField attributeField,

             String searchPropertyValue) {

         if (StringUtils.isBlank(searchPropertyValue))

             return;

         // make sure a wildcard/operator is in the value

         boolean found = false;

         for (SearchOperator op : SearchOperator.QUERY_CHARACTERS) {

             String queryCharacter = op.op();

             if (searchPropertyValue.contains(queryCharacter)) {

                 found = true;

             }

         }

         if (!found) {

             return;

         }

         String attributeLabel = attributeField.getLabel();

         if ((LookupAttributeField.class.isAssignableFrom(attributeField.getClass())) &&

                 (((LookupAttributeField) attributeField).isTreatWildcardsAndOperatorsAsLiteral())) {

             Object dataObjectExample = null;

             try {

                 dataObjectExample = getDataObjectClass().newInstance();

             } catch (Exception e) {

                 LOG.error("Exception caught instantiating " + getDataObjectClass().getName(), e);

                 throw new RuntimeException("Cannot instantiate " + getDataObjectClass().getName(), e);

             }

             Class<?> propertyType =

                     ObjectPropertyUtils.getPropertyType(getDataObjectClass(), attributeField.getPropertyName());

             if (TypeUtils.isIntegralClass(propertyType) || TypeUtils.isDecimalClass(propertyType) ||

                     TypeUtils.isTemporalClass(propertyType)) {

                 GlobalVariables.getMessageMap().putError(attributeField.getPropertyName(),

                         RiceKeyConstants.ERROR_WILDCARDS_AND_OPERATORS_NOT_ALLOWED_ON_FIELD, attributeLabel);

             }

             if (TypeUtils.isStringClass(propertyType)) {

                 GlobalVariables.getMessageMap().putInfo(attributeField.getPropertyName(),

                         RiceKeyConstants.INFO_WILDCARDS_AND_OPERATORS_TREATED_LITERALLY, attributeLabel);

             }

         } else {

             if (getDataObjectAuthorizationService()

                     .attributeValueNeedsToBeEncryptedOnFormsAndLinks(getDataObjectClass(),

                             attributeField.getPropertyName())) {

                 if (!searchPropertyValue.endsWith(EncryptionService.ENCRYPTION_POST_PREFIX)) {

                     // encrypted values usually come from the DB, so we don't

                     // need to filter for wildcards

                     // wildcards are not allowed on restricted fields, because

                     // they are typically encrypted, and wildcard searches cannot be performed without

                     // decrypting every row, which is currently not supported by KRAD

                     GlobalVariables.getMessageMap()

                             .putError(attributeField.getPropertyName(), RiceKeyConstants.ERROR_SECURE_FIELD,

                                     attributeLabel);

                 }

             }

         }

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#getReturnUrlForResults

      */

     public void getReturnUrlForResults(LinkField returnLinkField, Object model) {

         LookupForm lookupForm = (LookupForm) model;

         LookupView lookupView = (LookupView) returnLinkField.getContext().get(UifConstants.ContextVariableNames.VIEW);

         Object dataObject = returnLinkField.getContext().get(UifConstants.ContextVariableNames.LINE);

         // don't render return link if the object is null or if the row is not returnable

         if ((dataObject == null) || (!isResultReturnable(dataObject))) {

             returnLinkField.setRender(false);

             return;

         }

         // build return link href

         String href = getReturnUrl(lookupView, lookupForm, dataObject);

         if (StringUtils.isBlank(href)) {

             returnLinkField.setRender(false);

             return;

         }

         // TODO: need to handle returning anchor

         returnLinkField.setHrefText(href);

         // build return link label and title

         String linkLabel =

                 getConfigurationService().getPropertyValueAsString(

                         KRADConstants.Lookup.TITLE_RETURN_URL_PREPENDTEXT_PROPERTY);

         returnLinkField.setLinkLabel(linkLabel);

         List<String> returnKeys = getReturnKeys(lookupView, lookupForm, dataObject);

         Map<String, String> returnKeyValues = KRADUtils.getPropertyKeyValuesFromDataObject(returnKeys, dataObject);

         String title = LookupInquiryUtils.getLinkTitleText(linkLabel, getDataObjectClass(), returnKeyValues);

         returnLinkField.setTitle(title);

         // Add the return target if it is set

         String returnTarget = lookupView.getReturnTarget();

         if (returnTarget != null) {

             returnLinkField.setTarget(returnTarget);

             // Close the light box if return target is not _self or _parent

             if (!returnTarget.equals("_self") && !returnTarget.equals("_parent")) {

                 returnLinkField.setOnClickScript("parent.$.fancybox.close();");

             }

         }

     }

     /**

      * Builds the URL for returning the given data object result row

      *

      * <p>

      * Note return URL will only be built if a return location is specified on the <code>LookupForm</code>

      * </p>

      *

      * @param lookupView - lookup view instance containing lookup configuration

      * @param lookupForm - lookup form instance containing the data

      * @param dataObject - data object instance for the current line and for which the return URL is being built

      * @return String return URL or blank if URL cannot be built

      */

     protected String getReturnUrl(LookupView lookupView, LookupForm lookupForm, Object dataObject) {

         Properties props = getReturnUrlParameters(lookupView, lookupForm, dataObject);

         String href = "";

         if (StringUtils.isNotBlank(lookupForm.getReturnLocation())) {

             href = UrlFactory.parameterizeUrl(lookupForm.getReturnLocation(), props);

         }

         return href;

     }

     /**

      * Builds up a <code>Properties</code> object that will be used to provide the request parameters for the

      * return URL link

      *

      * @param lookupView - lookup view instance containing lookup configuration

      * @param lookupForm - lookup form instance containing the data

      * @param dataObject - data object instance for the current line and for which the return URL is being built

      * @return Properties instance containing request parameters for return URL

      */

     protected Properties getReturnUrlParameters(LookupView lookupView, LookupForm lookupForm, Object dataObject) {

         Properties props = new Properties();

         props.put(KRADConstants.DISPATCH_REQUEST_PARAMETER, KRADConstants.RETURN_METHOD_TO_CALL);

         if (StringUtils.isNotBlank(lookupForm.getReturnFormKey())) {

             props.put(UifParameters.FORM_KEY, lookupForm.getReturnFormKey());

         }

         props.put(KRADConstants.REFRESH_CALLER, lookupView.getId());

         props.put(KRADConstants.REFRESH_DATA_OBJECT_CLASS, getDataObjectClass());

         if (StringUtils.isNotBlank(lookupForm.getDocNum())) {

             props.put(UifParameters.DOC_NUM, lookupForm.getDocNum());

         }

         if (StringUtils.isNotBlank(lookupForm.getReferencesToRefresh())) {

             props.put(KRADConstants.REFERENCES_TO_REFRESH, lookupForm.getReferencesToRefresh());

         }

         List<String> returnKeys = getReturnKeys(lookupView, lookupForm, dataObject);

         Map<String, String> returnKeyValues = KRADUtils.getPropertyKeyValuesFromDataObject(returnKeys, dataObject);

         for (String returnKey : returnKeyValues.keySet()) {

             String returnValue = returnKeyValues.get(returnKey);

             if (lookupForm.getFieldConversions().containsKey(returnKey)) {

                 returnKey = lookupForm.getFieldConversions().get(returnKey);

             }

             props.put(returnKey, returnValue);

         }

         return props;

     }

     /**

      * Returns the configured return key property names or if not configured defaults to the primary keys

      * for the data object class

      *

      * @return List<String> property names which should be passed back on the return URL

      */

     protected List<String> getReturnKeys(LookupView lookupView, LookupForm lookupForm, Object dataObject) {

         List<String> returnKeys;

         if (lookupForm.getFieldConversions() != null && !lookupForm.getFieldConversions().isEmpty()) {

             returnKeys = new ArrayList<String>(lookupForm.getFieldConversions().keySet());

         } else {

             returnKeys = getDataObjectMetaDataService().listPrimaryKeyFieldNames(getDataObjectClass());

         }

         return returnKeys;

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#getMaintenanceActionLink

      */

     public void getMaintenanceActionLink(LinkField actionLinkField, Object model, String maintenanceMethodToCall) {

         LookupForm lookupForm = (LookupForm) model;

         LookupView lookupView = (LookupView) actionLinkField.getContext().get(UifConstants.ContextVariableNames.VIEW);

         Object dataObject = actionLinkField.getContext().get(UifConstants.ContextVariableNames.LINE);

         List<String> pkNames = getDataObjectMetaDataService().listPrimaryKeyFieldNames(getDataObjectClass());

         // build maintenance link href

         String href = getActionUrlHref(lookupForm, dataObject, maintenanceMethodToCall, pkNames);

         if (StringUtils.isBlank(href)) {

             actionLinkField.setRender(false);

             return;

         }

         // TODO: need to handle returning anchor

         actionLinkField.setHrefText(href);

         // build action title

         String prependTitleText = actionLinkField.getLinkLabel() + " " +

                 getDataDictionaryService().getDataDictionary().getDataObjectEntry(getDataObjectClass().getName())

                         .getObjectLabel() + " " +

                 getConfigurationService().getPropertyValueAsString(

                         KRADConstants.Lookup.TITLE_ACTION_URL_PREPENDTEXT_PROPERTY);

         Map<String, String> primaryKeyValues = KRADUtils.getPropertyKeyValuesFromDataObject(pkNames, dataObject);

         String title = LookupInquiryUtils.getLinkTitleText(prependTitleText, getDataObjectClass(), primaryKeyValues);

         actionLinkField.setTitle(title);

         // TODO : do not hardcode the _self string

         actionLinkField.setTarget("_self");

         lookupForm.setAtLeastOneRowHasActions(true);

     }

     /**

      * Generates a URL to perform a maintenance action on the given result data object

      *

      * <p>

      * Will build a URL containing keys of the data object to invoke the given maintenance action method

      * within the maintenance controller

      * </p>

      *

      * @param dataObject - data object instance for the line to build the maintenance action link for

      * @param methodToCall - method name on the maintenance controller that should be invoked

      * @param pkNames - list of primary key field names for the data object whose key/value pairs will be added to

      * the maintenance link

      * @return String URL link for the maintenance action

      */

     protected String getActionUrlHref(LookupForm lookupForm, Object dataObject, String methodToCall,

             List<String> pkNames) {

         Properties props = new Properties();

         props.put(KRADConstants.DISPATCH_REQUEST_PARAMETER, methodToCall);

         Map<String, String> primaryKeyValues = KRADUtils.getPropertyKeyValuesFromDataObject(pkNames, dataObject);

         for (String primaryKey : primaryKeyValues.keySet()) {

             String primaryKeyValue = primaryKeyValues.get(primaryKey);

             props.put(primaryKey, primaryKeyValue);

         }

         if (StringUtils.isNotBlank(lookupForm.getReturnLocation())) {

             props.put(KRADConstants.RETURN_LOCATION_PARAMETER, lookupForm.getReturnLocation());

         }

         props.put(UifParameters.DATA_OBJECT_CLASS_NAME, dataObject.getClass().getName());

         props.put(UifParameters.VIEW_TYPE_NAME, UifConstants.ViewType.MAINTENANCE);

         return UrlFactory.parameterizeUrl(KRADConstants.Maintenance.REQUEST_MAPPING_MAINTENANCE, props);

     }

     /**

      * Determines if given data object has associated maintenance document that allows new or copy

      * maintenance

      * actions

      *

      * @return boolean true if the maintenance new or copy action is allowed for the data object instance, false

      *         otherwise

      */

     public boolean allowsMaintenanceNewOrCopyAction() {

         boolean allowsNewOrCopy = false;

         String maintDocTypeName = getMaintenanceDocumentTypeName();

         if (StringUtils.isNotBlank(maintDocTypeName)) {

             allowsNewOrCopy = getDataObjectAuthorizationService()

                     .canCreate(getDataObjectClass(), GlobalVariables.getUserSession().getPerson(), maintDocTypeName);

         }

         return allowsNewOrCopy;

     }

     /**

      * Determines if given data object has associated maintenance document that allows edit maintenance

      * actions

      *

      * @return boolean true if the maintenance edit action is allowed for the data object instance, false otherwise

      */

     public boolean allowsMaintenanceEditAction(Object dataObject) {

         boolean allowsEdit = false;

         String maintDocTypeName = getMaintenanceDocumentTypeName();

         if (StringUtils.isNotBlank(maintDocTypeName)) {

             allowsEdit = getDataObjectAuthorizationService()

                     .canMaintain(dataObject, GlobalVariables.getUserSession().getPerson(), maintDocTypeName);

         }

         return allowsEdit;

     }

     /**

      * Determines if given data object has associated maintenance document that allows delete maintenance

      * actions.

      *

      * @return boolean true if the maintenance delete action is allowed for the data object instance, false otherwise

      */

     public boolean allowsMaintenanceDeleteAction(Object dataObject) {

         boolean allowsMaintain = false;

         boolean allowsDelete = false;

         String maintDocTypeName = getMaintenanceDocumentTypeName();

         if (StringUtils.isNotBlank(maintDocTypeName)) {

             allowsMaintain = getDataObjectAuthorizationService()

                     .canMaintain(dataObject, GlobalVariables.getUserSession().getPerson(), maintDocTypeName);

         }

         allowsDelete = getDocumentDictionaryService().getAllowsRecordDeletion(getDataObjectClass());

         return allowsDelete && allowsMaintain;

     }

     /**

      * Returns the maintenance document type associated with the business object class or null if one does not exist.

      *

      * @return String representing the maintenance document type name

      */

     protected String getMaintenanceDocumentTypeName() {

         DocumentDictionaryService dd = getDocumentDictionaryService();

         String maintDocTypeName = dd.getMaintenanceDocumentTypeName(getDataObjectClass());

         return maintDocTypeName;

     }

     /**

      * Determines whether a given data object that's returned as one of the lookup's results is considered returnable,

      * which means that for single-value lookups, a "return value" link may be rendered, and for multiple

      * value lookups, a checkbox is rendered.

      *

      * Note that this can be part of an authorization mechanism, but not the complete authorization mechanism.  The

      * component that invoked the lookup/ lookup caller (e.g. document, nesting lookup, etc.) needs to check

      * that the object that was passed to it was returnable as well because there are ways around this method

      * (e.g. crafting a custom return URL).

      *

      * @param dataObject - an object from the search result set

      * @return true if the row is returnable and false if it is not

      */

     protected boolean isResultReturnable(Object dataObject) {

         return true;

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#setDataObjectClass

      */

     @Override

     public void setDataObjectClass(Class<?> dataObjectClass) {

         this.dataObjectClass = dataObjectClass;

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#getDataObjectClass

      */

     @Override

     public Class<?> getDataObjectClass() {

         return this.dataObjectClass;

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#setFieldConversions

      */

     @Override

     public void setFieldConversions(Map<String, String> fieldConversions) {

         this.fieldConversions = fieldConversions;

     }

     /**

      * @see org.kuali.rice.krad.lookup.Lookupable#setReadOnlyFieldsList

      */

     @Override

     public void setReadOnlyFieldsList(List<String> readOnlyFieldsList) {

         this.readOnlyFieldsList = readOnlyFieldsList;

     }

     public Map<String, String> getParameters() {

         return parameters;

     }

     public void setParameters(Map<String, String> parameters) {

         this.parameters = parameters;

     }

     public List<String> getDefaultSortAttributeNames() {

         return defaultSortAttributeNames;

     }

     public void setDefaultSortAttributeNames(List<String> defaultSortAttributeNames) {

         this.defaultSortAttributeNames = defaultSortAttributeNames;

     }

     public boolean isSortAscending() {

         return sortAscending;

     }

     public void setSortAscending(boolean sortAscending) {

         this.sortAscending = sortAscending;

     }

     public List<String> getReadOnlyFieldsList() {

         return readOnlyFieldsList;

     }

     public Map<String, String> getFieldConversions() {

         return fieldConversions;

     }

     protected ConfigurationService getConfigurationService() {

         if (configurationService == null) {

             this.configurationService = KRADServiceLocator.getKualiConfigurationService();

         }

         return configurationService;

     }

     public void setConfigurationService(ConfigurationService configurationService) {

         this.configurationService = configurationService;

     }

     protected DataObjectAuthorizationService getDataObjectAuthorizationService() {

         if (dataObjectAuthorizationService == null) {

             this.dataObjectAuthorizationService = KRADServiceLocatorWeb.getDataObjectAuthorizationService();

         }

         return dataObjectAuthorizationService;

     }

     public void setDataObjectAuthorizationService(DataObjectAuthorizationService dataObjectAuthorizationService) {

         this.dataObjectAuthorizationService = dataObjectAuthorizationService;

     }

     protected DataObjectMetaDataService getDataObjectMetaDataService() {

         if (dataObjectMetaDataService == null) {

             this.dataObjectMetaDataService = KRADServiceLocatorWeb.getDataObjectMetaDataService();

         }

         return dataObjectMetaDataService;

     }

     public void setDataObjectMetaDataService(DataObjectMetaDataService dataObjectMetaDataService) {

         this.dataObjectMetaDataService = dataObjectMetaDataService;

     }

     public DocumentDictionaryService getDocumentDictionaryService() {

         if (documentDictionaryService == null) {

             documentDictionaryService = KRADServiceLocatorWeb.getDocumentDictionaryService();

         }

         return documentDictionaryService;

     }

     public void setDocumentDictionaryService(DocumentDictionaryService documentDictionaryService) {

         this.documentDictionaryService = documentDictionaryService;

     }

     protected LookupService getLookupService() {

         if (lookupService == null) {

             this.lookupService = KRADServiceLocatorWeb.getLookupService();

         }

         return lookupService;

     }

     public void setLookupService(LookupService lookupService) {

         this.lookupService = lookupService;

     }

     protected EncryptionService getEncryptionService() {

         if (encryptionService == null) {

             this.encryptionService = CoreApiServiceLocator.getEncryptionService();

         }

         return encryptionService;

     }

     public void setEncryptionService(EncryptionService encryptionService) {

         this.encryptionService = encryptionService;

     }

 }