/*

  * Copyright 2005-2007 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.kns.service.impl;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.Iterator;

 import java.util.List;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.kew.dto.DocumentTypeDTO;

 import org.kuali.rice.kew.exception.WorkflowException;

 import org.kuali.rice.kns.bo.PersistableBusinessObject;

 import org.kuali.rice.kns.datadictionary.DataDictionary;

 import org.kuali.rice.kns.datadictionary.MaintainableCollectionDefinition;

 import org.kuali.rice.kns.datadictionary.MaintainableFieldDefinition;

 import org.kuali.rice.kns.datadictionary.MaintainableItemDefinition;

 import org.kuali.rice.kns.datadictionary.MaintainableSectionDefinition;

 import org.kuali.rice.kns.datadictionary.MaintenanceDocumentEntry;

 import org.kuali.rice.kns.document.MaintenanceDocument;

 import org.kuali.rice.kns.lookup.valueFinder.ValueFinder;

 import org.kuali.rice.kns.maintenance.Maintainable;

 import org.kuali.rice.kns.maintenance.rules.MaintenanceDocumentRuleBase;

 import org.kuali.rice.kns.service.DataDictionaryService;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 import org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService;

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

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

 import org.kuali.rice.kns.util.RiceKeyConstants;

 /**

  * This class is the service implementation for the MaintenanceDocumentDictionary structure. Defines the API for the interacting

  * with Document-related entries in the data dictionary. This is the default implementation, that is delivered with Kuali.

  */

 public class MaintenanceDocumentDictionaryServiceImpl implements MaintenanceDocumentDictionaryService {

     protected static org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(MaintenanceDocumentDictionaryServiceImpl.class);

     private DataDictionaryService dataDictionaryService;

     /**

      * This method gets the workflow document type for the given documentTypeName

      * 

      * @param documentTypeName

      * @return

      */

     protected DocumentTypeDTO getDocumentType(String documentTypeName) {

         try {

             return KNSServiceLocator.getWorkflowInfoService().getDocType(documentTypeName);

         } catch (WorkflowException e) {

             throw new RuntimeException("Caught exception attempting to get document type for doc type name '" + documentTypeName + "'", e);

         }

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getMaintenanceLabel(java.lang.String)

      */

     public String getMaintenanceLabel(String docTypeName) {

         String label = null;

         DocumentTypeDTO docType = getDocumentType(docTypeName);

         if (docType != null) {

             label = docType.getDocTypeLabel();

         }

         return label;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getMaintenanceDescription(java.lang.String)

      */

     public String getMaintenanceDescription(String docTypeName) {

         String description = null;

         DocumentTypeDTO docType = getDocumentType(docTypeName);

         if (docType != null) {

             description = docType.getDocTypeDescription();

         }

         return description;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getMaintainableClass(java.lang.String)

      */

     public Class getMaintainableClass(String docTypeName) {

         Class maintainableClass = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(docTypeName);

         if (entry != null) {

             LOG.debug("suppling a generic Rule to insure basic validation");

             maintainableClass = entry.getMaintainableClass();

         }

         return maintainableClass;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getBusinessObjectClass(java.lang.String)

      */

     public Class getBusinessObjectClass(String docTypeName) {

         Class businessObjectClass = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(docTypeName);

         if (entry != null) {

             businessObjectClass = entry.getBusinessObjectClass();

         }

         return businessObjectClass;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getDocumentTypeName(java.lang.Class)

      */

     public String getDocumentTypeName(Class businessObjectClass) {

         String documentTypeName = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(businessObjectClass);

         if (entry != null) {

             documentTypeName = entry.getDocumentTypeName();

         }

         return documentTypeName;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getMaintainableSections(java.lang.String)

      */

     public List getMaintainableSections(String docTypeName) {

         List sections = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(docTypeName);

         if (entry != null) {

             sections = entry.getMaintainableSections();

         }

         return sections;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getBusinessRulesClass(MaintenanceDocument)

      */

     public Class getBusinessRulesClass(MaintenanceDocument document) {

         Maintainable maintainable = document.getOldMaintainableObject();

         if (maintainable == null) {

             throw new IllegalArgumentException("unable to determine documentType for maintenanceDocument with no oldMaintainableObject");

         }

         Class businessRulesClass = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(maintainable.getBoClass());

         if (entry != null) {

             businessRulesClass = entry.getBusinessRulesClass();

         }

         if (businessRulesClass == null) {

             return MaintenanceDocumentRuleBase.class; // default to a generic rule that will enforce Required fields

         }

         LOG.info("return class: " + businessRulesClass.getName());

         return businessRulesClass;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getDefaultExistenceChecks(java.lang.Class)

      */

     public Collection getDefaultExistenceChecks(Class businessObjectClass) {

         return getDefaultExistenceChecks(getDocumentTypeName(businessObjectClass));

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getDefaultExistenceChecks(java.lang.String)

      */

     public Collection getDefaultExistenceChecks(String docTypeName) {

         Collection defaultExistenceChecks = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(docTypeName);

         if (entry != null) {

             defaultExistenceChecks = entry.getDefaultExistenceChecks();

         }

         return defaultExistenceChecks;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getApplyApcRules(java.lang.Class)

      */

     public Collection getApplyApcRules(Class businessObjectClass) {

         return getApplyApcRules(getDocumentTypeName(businessObjectClass));

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getApplyApcRules(java.lang.String)

      */

     public Collection getApplyApcRules(String docTypeName) {

         Collection apcRules = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(docTypeName);

         if (entry != null) {

             apcRules = entry.getApcRules();

         }

         return apcRules;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getLockingKeys(java.lang.String)

      */

     public List getLockingKeys(String docTypeName) {

         List lockingKeys = null;

         MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(docTypeName);

         if (entry != null) {

             lockingKeys = entry.getLockingKeyFieldNames();

         }

         return lockingKeys;

     }

     /**

      * @param dataDictionaryService

      */

     public void setDataDictionaryService(DataDictionaryService dataDictionaryService) {

         this.dataDictionaryService = dataDictionaryService;

     }

     /**

      * @return

      */

     public DataDictionary getDataDictionary() {

         return this.dataDictionaryService.getDataDictionary();

     }

     /**

      * @param docTypeName

      * @return

      */

     public MaintenanceDocumentEntry getMaintenanceDocumentEntry(String docTypeName) {

         if (StringUtils.isBlank(docTypeName)) {

             throw new IllegalArgumentException("invalid (blank) docTypeName");

         }

         MaintenanceDocumentEntry entry = (MaintenanceDocumentEntry)getDataDictionary().getDocumentEntry(docTypeName);

         return entry;

     }

     private MaintenanceDocumentEntry getMaintenanceDocumentEntry(Class businessObjectClass) {

         if (businessObjectClass == null) {

             throw new IllegalArgumentException("invalid (blank) businessObjectClass");

         }

         MaintenanceDocumentEntry entry = getDataDictionary().getMaintenanceDocumentEntryForBusinessObjectClass(businessObjectClass);

         return entry;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getFieldDefaultValue(java.lang.Class, java.lang.String)

      */

     public String getFieldDefaultValue(Class boClass, String fieldName) {

         // input parameter validation

         if (boClass == null) {

             throw new IllegalArgumentException("The boClass parameter value specified was " + "null.  A valid class representing the boClass must " + "be specified.");

         }

         // call the twin

         return getFieldDefaultValue(getDocumentTypeName(boClass), fieldName);

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getFieldDefaultValue(java.lang.String, java.lang.String)

      */

     public String getFieldDefaultValue(String docTypeName, String fieldName) {

         // input parameter validation

         if (StringUtils.isBlank(docTypeName)) {

             throw new IllegalArgumentException("The docTypeName parameter value specified was  " + "blank, whitespace, or null.  A valid string representing the docTypeName must " + "be specified.");

         }

         if (StringUtils.isBlank(fieldName)) {

             throw new IllegalArgumentException("The fieldName parameter value specified was  " + "blank, whitespace, or null.  A valid string representing the fieldName must " + "be specified.");

         }

         // walk through the sections

         List sections = getMaintainableSections(docTypeName);

         for (Iterator sectionIterator = sections.iterator(); sectionIterator.hasNext();) {

             MaintainableSectionDefinition section = (MaintainableSectionDefinition) sectionIterator.next();

             // walk through the fields

             Collection fields = section.getMaintainableItems();

             String defaultValue = getFieldDefaultValue(fields, fieldName);

             // need to keep trying sections until a match is found

             if (defaultValue != null) {

                 return defaultValue;

             }

         }

         return null;

     }

     private String getFieldDefaultValue(Collection maintainableFields, String fieldName) {

         for (Iterator iterator = maintainableFields.iterator(); iterator.hasNext();) {

             MaintainableItemDefinition item = (MaintainableItemDefinition) iterator.next();

             // only check fields...skip subcollections

             if (item instanceof MaintainableFieldDefinition) {

                 MaintainableFieldDefinition field = (MaintainableFieldDefinition) item;

                 // if the field name matches

                 if (field.getName().endsWith(fieldName)) {

                     // preferentially take the raw default value

                     if (StringUtils.isNotBlank(field.getDefaultValue())) {

                         return field.getDefaultValue();

                     }

                     // take the valuefinder

                     else if (field.getDefaultValueFinderClass() != null) {

                         // attempt to get an instance of the defaultValueFinderClass

                         ValueFinder valueFinder = null;

                         try {

                             valueFinder = (ValueFinder) field.getDefaultValueFinderClass().newInstance();

                         }

                         catch (Exception e) {

                             LOG.info("Exception obtaining valueFinder for collection field default value", e);

                             valueFinder = null;

                         }

                         // get the value

                         if (valueFinder != null) {

                             return valueFinder.getValue();

                         }

                     }

                     // if we found the field, but no default anything, then we're done

                     else {

                         return null;

                     }

                 }

             }

         }

         return null;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getCollectionFieldDefaultValue(java.lang.String,

      *      java.lang.String, java.lang.String)

      */

     public String getCollectionFieldDefaultValue(String docTypeName, String collectionName, String fieldName) {

         // input parameter validation

         if (StringUtils.isBlank(docTypeName)) {

             throw new IllegalArgumentException("The docTypeName parameter value specified was blank, whitespace, or null.  A valid string representing the docTypeName must be specified.");

         }

         if (StringUtils.isBlank(fieldName)) {

             throw new IllegalArgumentException("The fieldName parameter value specified was blank, whitespace, or null.  A valid string representing the fieldName must be specified.");

         }

         if (StringUtils.isBlank(collectionName)) {

             throw new IllegalArgumentException("The collectionName parameter value specified was null.  A valid string representing the collectionName must be specified.");

         }

         MaintainableCollectionDefinition coll = getMaintainableCollection(docTypeName, collectionName);

         if (coll != null) {

             Collection collectionFields = coll.getMaintainableFields();

             return getFieldDefaultValue(collectionFields, fieldName);

         }

         return null;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getAllowsCopy(MaintenanceDocument)

      */

     public Boolean getAllowsCopy(MaintenanceDocument document) {

         Boolean allowsCopy = Boolean.FALSE;

         if (document != null && document.getNewMaintainableObject() != null) {

             MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(document.getNewMaintainableObject().getBoClass());

             if (entry != null) {

                 allowsCopy = Boolean.valueOf(entry.getAllowsCopy());

             }

         }

         return allowsCopy;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getAllowsNewOrCopy(java.lang.String)

      */

     public Boolean getAllowsNewOrCopy(String docTypeName) {

         Boolean allowsNewOrCopy = Boolean.FALSE;

         if (docTypeName != null) {

             MaintenanceDocumentEntry entry = getMaintenanceDocumentEntry(docTypeName);

             if (entry != null) {

                 allowsNewOrCopy = Boolean.valueOf(entry.getAllowsNewOrCopy());

             }

         }

         return allowsNewOrCopy;

     }

     public MaintainableItemDefinition getMaintainableItem(String docTypeName, String itemName) {

         // input parameter validation

         if (StringUtils.isBlank(docTypeName)) {

             throw new IllegalArgumentException("The docTypeName parameter value specified was  " + "blank, whitespace, or null.  A valid string representing the docTypeName must " + "be specified.");

         }

         if (StringUtils.isBlank(itemName)) {

             throw new IllegalArgumentException("The itemName parameter value specified was  " + "blank, whitespace, or null.  A valid string representing the itemName must " + "be specified.");

         }

         // split name for subcollections

         String[] subItems = {};

         subItems = StringUtils.split(itemName, ".");

         // walk through the sections

         List sections = getMaintainableSections(docTypeName);

         for (Iterator sectionIterator = sections.iterator(); sectionIterator.hasNext();) {

             MaintainableSectionDefinition section = (MaintainableSectionDefinition) sectionIterator.next();

             // walk through the fields

             Collection fields = section.getMaintainableItems();

             for (Iterator fieldIterator = fields.iterator(); fieldIterator.hasNext();) {

                 MaintainableItemDefinition item = (MaintainableItemDefinition) fieldIterator.next();

                 if (item.getName().equals(itemName)) {

                     return item;

                 }

                 // if collection check to see if it has sub collections

                 // for now this only allows 1 level (i.e. a.b) it should be expanded at some point

                 if (item instanceof MaintainableCollectionDefinition) {

                     MaintainableCollectionDefinition col = (MaintainableCollectionDefinition) item;

                     if ((subItems.length > 1) && (StringUtils.equals(col.getName(), subItems[0]))) {

                         for (Iterator<MaintainableCollectionDefinition> colIterator = col.getMaintainableCollections().iterator(); colIterator.hasNext();) {

                             MaintainableCollectionDefinition subCol = (MaintainableCollectionDefinition) colIterator.next();

                             if (subCol.getName().equals(subItems[1])) {

                                 return subCol;

                             }

                         }

                     }

                 }

             }

         }

         return null;

     }

     public MaintainableFieldDefinition getMaintainableField(String docTypeName, String fieldName) {

         MaintainableItemDefinition item = getMaintainableItem(docTypeName, fieldName);

         if (item != null && item instanceof MaintainableFieldDefinition) {

             return (MaintainableFieldDefinition) item;

         }

         return null;

     }

     public MaintainableCollectionDefinition getMaintainableCollection(String docTypeName, String collectionName) {

         // strip brackets as they are not needed to get to collection class

         // Like the other subcollections changes this currently only supports one sub level

         if (StringUtils.contains(collectionName, "[")) {

             collectionName = StringUtils.substringBefore(collectionName, "[") + StringUtils.substringAfter(collectionName, "]");

         }

         MaintainableItemDefinition item = getMaintainableItem(docTypeName, collectionName);

         if (item != null && item instanceof MaintainableCollectionDefinition) {

             return (MaintainableCollectionDefinition) item;

         }

         return null;

     }

     public Class getCollectionBusinessObjectClass(String docTypeName, String collectionName) {

         MaintainableCollectionDefinition coll = getMaintainableCollection(docTypeName, collectionName);

         if (coll != null) {

             return coll.getBusinessObjectClass();

         }

         return null;

     }

     public List<MaintainableCollectionDefinition> getMaintainableCollections(String docTypeName) {

         ArrayList<MaintainableCollectionDefinition> collections = new ArrayList<MaintainableCollectionDefinition>();

         // walk through the sections

         List sections = getMaintainableSections(docTypeName);

         for (Iterator sectionIterator = sections.iterator(); sectionIterator.hasNext();) {

             MaintainableSectionDefinition section = (MaintainableSectionDefinition) sectionIterator.next();

             // walk through the fields

             Collection fields = section.getMaintainableItems();

             for (Iterator fieldIterator = fields.iterator(); fieldIterator.hasNext();) {

                 MaintainableItemDefinition item = (MaintainableItemDefinition) fieldIterator.next();

                 if (item instanceof MaintainableCollectionDefinition) {

                     collections.add((MaintainableCollectionDefinition) item);

                     // collections.addAll( getMaintainableCollections( (MaintainableCollectionDefinition)item ) );

                 }

             }

         }

         return collections;

     }

     public List<MaintainableCollectionDefinition> getMaintainableCollections(MaintainableCollectionDefinition parentCollection) {

         ArrayList<MaintainableCollectionDefinition> collections = new ArrayList<MaintainableCollectionDefinition>();

         // walk through the sections

         Collection<MaintainableCollectionDefinition> colls = parentCollection.getMaintainableCollections();

         for (MaintainableCollectionDefinition coll : colls) {

             collections.add(coll);

             collections.addAll(getMaintainableCollections(coll));

         }

         return collections;

     }

     /**

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#validateMaintenanceRequiredFields(org.kuali.rice.kns.document.MaintenanceDocument)

      */

     public void validateMaintenanceRequiredFields(MaintenanceDocument document) {

         Maintainable newMaintainableObject = document.getNewMaintainableObject();

         if (newMaintainableObject == null) {

             LOG.error("New maintainable is null");

             throw new RuntimeException("New maintainable is null");

         }

         List<MaintainableSectionDefinition> maintainableSectionDefinitions = getMaintainableSections(getDocumentTypeName(newMaintainableObject.getBoClass()));

         for (MaintainableSectionDefinition maintainableSectionDefinition : maintainableSectionDefinitions) {

             for (MaintainableItemDefinition maintainableItemDefinition : maintainableSectionDefinition.getMaintainableItems()) {

                 // validate fields

                 if (maintainableItemDefinition instanceof MaintainableFieldDefinition) {

                     validateMaintainableFieldRequiredFields((MaintainableFieldDefinition) maintainableItemDefinition, newMaintainableObject.getBusinessObject(), maintainableItemDefinition.getName());

                 }

                 // validate collections

                 else if (maintainableItemDefinition instanceof MaintainableCollectionDefinition) {

                     validateMaintainableCollectionsRequiredFields(newMaintainableObject.getBusinessObject(), (MaintainableCollectionDefinition) maintainableItemDefinition);

                 }

             }

         }

     }

     /**

      * generates error message if a field is marked as required but is not filled in

      * 

      * @param maintainableFieldDefinition

      * @param businessObject

      * @param fieldName

      */

     private void validateMaintainableFieldRequiredFields(MaintainableFieldDefinition maintainableFieldDefinition, PersistableBusinessObject businessObject, String fieldName) {

         if (StringUtils.isBlank(fieldName)) {

             throw new IllegalArgumentException("invalid fieldName parameter.");

         }

         // if required check we have a value for this field

         if (maintainableFieldDefinition.isRequired() && !maintainableFieldDefinition.isUnconditionallyReadOnly() ) {

             try {

                 Object obj = ObjectUtils.getNestedValue(businessObject, fieldName);

                 if (obj == null || StringUtils.isBlank(obj.toString())) {

                     String attributeLabel = dataDictionaryService.getAttributeLabel(businessObject.getClass(), fieldName);

                     String shortLabel = dataDictionaryService.getAttributeShortLabel(businessObject.getClass(), fieldName);

                     GlobalVariables.getMessageMap().putError(fieldName, RiceKeyConstants.ERROR_REQUIRED, attributeLabel + " (" + shortLabel + ")" );

                 } else if ( fieldName.endsWith(".principalName") ) {

                     // special handling to catch when the principalName is not really a valid user

                     // pull the Person object and test the entity ID.  If that's null, then this

                     // is just a shell user instance and does not represent a true user

                     // the main principalId property on the main object would be null at this point

                     // but it is also unconditionally read only and not tested - checking that would

                     // require checking the relationships and be more complex than we want to get here

                     String personProperty = ObjectUtils.getNestedAttributePrefix(fieldName); 

                     if ( StringUtils.isNotBlank(personProperty) ) {

                         if ( StringUtils.isBlank( (String)ObjectUtils.getNestedValue(businessObject, personProperty+".entityId") ) ) {

                             String attributeLabel = dataDictionaryService.getAttributeLabel(businessObject.getClass(), fieldName);

                             GlobalVariables.getMessageMap().putError(fieldName, RiceKeyConstants.ERROR_EXISTENCE, attributeLabel );

                         }

                     }

                 }

             } catch( Exception ex ) {

                 LOG.error( "unable to read property during doc required field checks", ex );

             }

         }

     }

     private MaintainableCollectionDefinition getCollectionDefinition( String docTypeName, String collectionName ) {

         String currentCollection = collectionName;

         String nestedCollections = "";

             if (StringUtils.contains(collectionName, "[")) {

                     // strip off any array indexes

             currentCollection = StringUtils.substringBefore( collectionName, "[" );

             nestedCollections = StringUtils.substringAfter( collectionName, "." );

             }

         // loop over all sections to find this collection

         List<MaintainableSectionDefinition> maintainableSectionDefinitions = getMaintainableSections( docTypeName );

         for (MaintainableSectionDefinition maintainableSectionDefinition : maintainableSectionDefinitions) {

             for (MaintainableItemDefinition maintainableItemDefinition : maintainableSectionDefinition.getMaintainableItems()) {

                 if (maintainableItemDefinition instanceof MaintainableCollectionDefinition && maintainableItemDefinition.getName().equals( currentCollection ) ) {

                     if ( StringUtils.isBlank( nestedCollections ) ) {

                         return (MaintainableCollectionDefinition) maintainableItemDefinition;

                     } 

                     return getCollectionDefinition( (MaintainableCollectionDefinition)maintainableItemDefinition, nestedCollections );

                 }

             }

         }

         return null;

     }

     private MaintainableCollectionDefinition getCollectionDefinition( MaintainableCollectionDefinition collectionDef, String collectionName ) {

         String currentCollection = collectionName;

         String nestedCollections = "";

             if (StringUtils.contains(collectionName, "[")) {

                     // strip off any array indexes

             currentCollection = StringUtils.substringBefore( collectionName, "[" );

             nestedCollections = StringUtils.substringAfter( collectionName, "." );

             }

         // loop over all nested collections

         for (MaintainableCollectionDefinition maintainableCollectionDefinition : collectionDef.getMaintainableCollections()) {

             if ( maintainableCollectionDefinition.getName().equals( currentCollection ) ) {

                 if ( StringUtils.isBlank( nestedCollections ) ) {

                     return maintainableCollectionDefinition;

                 } 

                 return getCollectionDefinition( maintainableCollectionDefinition, nestedCollections );

             }

         }

         return null;

     }

     public void validateMaintainableCollectionsAddLineRequiredFields(MaintenanceDocument document, PersistableBusinessObject businessObject, String collectionName ) {

         MaintainableCollectionDefinition def = getCollectionDefinition( getDocumentTypeName(businessObject.getClass()), collectionName );

         if ( def != null ) {

             validateMaintainableCollectionsAddLineRequiredFields( document, businessObject, collectionName, def, 0);

         }

     }

     /**

      * calls code to generate error messages if maintainableFields within any collections or sub-collections are marked as required

      * 

      * @param document

      * @param businessObject

      * @param collectionName

      * @param maintainableCollectionDefinition

      * @param depth

      */

     private void validateMaintainableCollectionsAddLineRequiredFields(MaintenanceDocument document, PersistableBusinessObject businessObject, String collectionName, MaintainableCollectionDefinition maintainableCollectionDefinition, int depth) {

         if ( depth == 0 ) {

             GlobalVariables.getMessageMap().addToErrorPath("add");

         }

         // validate required fields on fields withing collection definition

         PersistableBusinessObject element = document.getNewMaintainableObject().getNewCollectionLine( collectionName );

         GlobalVariables.getMessageMap().addToErrorPath(collectionName);

         for (MaintainableFieldDefinition maintainableFieldDefinition : maintainableCollectionDefinition.getMaintainableFields()) {

             final String fieldName = maintainableFieldDefinition.getName();

             validateMaintainableFieldRequiredFields(maintainableFieldDefinition, element, fieldName);

         }

         GlobalVariables.getMessageMap().removeFromErrorPath(collectionName);

         if ( depth == 0 ) {

             GlobalVariables.getMessageMap().removeFromErrorPath("add");

         }

     }

     /**

      * calls code to generate error messages if maintainableFields within any collections or sub-collections are marked as required

      * 

      * @param businessObject

      * @param maintainableCollectionDefinition

      */

     private void validateMaintainableCollectionsRequiredFields(PersistableBusinessObject businessObject, MaintainableCollectionDefinition maintainableCollectionDefinition) {

         final String collectionName = maintainableCollectionDefinition.getName();

         // validate required fields on fields withing collection definition

         Collection<PersistableBusinessObject> collection = (Collection) ObjectUtils.getPropertyValue(businessObject, collectionName);

         if (collection != null && !collection.isEmpty()) {

             for (MaintainableFieldDefinition maintainableFieldDefinition : maintainableCollectionDefinition.getMaintainableFields()) {

                 int pos = 0;

                 final String fieldName = maintainableFieldDefinition.getName();

                 for (PersistableBusinessObject element : collection) {

                     String parentName = collectionName + "[" + (pos++) + "]";

                     GlobalVariables.getMessageMap().addToErrorPath(parentName);

                     validateMaintainableFieldRequiredFields(maintainableFieldDefinition, element, fieldName);

                     GlobalVariables.getMessageMap().removeFromErrorPath(parentName);

                 }

             }

             // recursivley validate required fields on subcollections

             GlobalVariables.getMessageMap().addToErrorPath(collectionName);

             for (MaintainableCollectionDefinition nestedMaintainableCollectionDefinition : maintainableCollectionDefinition.getMaintainableCollections()) {

                 for (PersistableBusinessObject element : collection) {

                     validateMaintainableCollectionsRequiredFields(element, nestedMaintainableCollectionDefinition);

                 }

             }

             GlobalVariables.getMessageMap().removeFromErrorPath(collectionName);

         }

     }

     /**

      * default implementation checks for duplicats based on keys of objects only

      * 

      * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#validateMaintainableCollectionsForDuplicateEntries(org.kuali.rice.kns.document.MaintenanceDocument)

      */

     public void validateMaintainableCollectionsForDuplicateEntries(MaintenanceDocument document) {

         Maintainable newMaintainableObject = document.getNewMaintainableObject();

         if (newMaintainableObject == null) {

             LOG.error("New maintainable is null");

             throw new RuntimeException("New maintainable is null");

         }

         List<MaintainableSectionDefinition> maintainableSectionDefinitions = getMaintainableSections(getDocumentTypeName(newMaintainableObject.getBoClass()));

         for (MaintainableSectionDefinition maintainableSectionDefinition : maintainableSectionDefinitions) {

             for (MaintainableItemDefinition maintainableItemDefinition : maintainableSectionDefinition.getMaintainableItems()) {

                 // validate collections

                 if (maintainableItemDefinition instanceof MaintainableCollectionDefinition) {

                     validateMaintainableCollectionsForDuplicateEntries(newMaintainableObject.getBusinessObject(), (MaintainableCollectionDefinition) maintainableItemDefinition);

                 }

             }

         }

     }

     /**

      * recursivly checks collections for duplicate entries based on key valuse

      * 

      * @param businessObject

      * @param maintainableCollectionDefinition

      */

     private void validateMaintainableCollectionsForDuplicateEntries(PersistableBusinessObject businessObject, MaintainableCollectionDefinition maintainableCollectionDefinition) {

         final String collectionName = maintainableCollectionDefinition.getName();

         if (maintainableCollectionDefinition.dissallowDuplicateKey()) {

             final Class maintainableBusinessObjectClass = businessObject.getClass();

             // validate that no duplicates based on keys exist

             Collection<PersistableBusinessObject> collection = (Collection) ObjectUtils.getPropertyValue(businessObject, collectionName);

             if (collection != null && !collection.isEmpty()) {

                 final String propertyName = maintainableCollectionDefinition.getAttributeToHighlightOnDuplicateKey();

                 // get collection label for dd

                 final String label = dataDictionaryService.getCollectionLabel(maintainableBusinessObjectClass, collectionName);

                 final String shortLabel = dataDictionaryService.getCollectionShortLabel(maintainableBusinessObjectClass, collectionName);

                 int pos = 0;

                 for (PersistableBusinessObject element : collection) {

                     String pathToElement = collectionName + "[" + (pos++) + "]";

                     if (ObjectUtils.countObjectsWithIdentitcalKey(collection, element) > 1) {

                         GlobalVariables.getMessageMap().addToErrorPath(pathToElement);

                         GlobalVariables.getMessageMap().putError(propertyName, RiceKeyConstants.ERROR_DUPLICATE_ELEMENT, new String[] { label, shortLabel });

                         GlobalVariables.getMessageMap().removeFromErrorPath(pathToElement);

                     }

                 }

                 // recursivley check for duplicate entries on subcollections

                 GlobalVariables.getMessageMap().addToErrorPath(collectionName);

                 for (MaintainableCollectionDefinition nestedMaintainableCollectionDefinition : maintainableCollectionDefinition.getMaintainableCollections()) {

                     for (PersistableBusinessObject element : collection) {

                         validateMaintainableCollectionsForDuplicateEntries(element, nestedMaintainableCollectionDefinition);

                     }

                 }

                 GlobalVariables.getMessageMap().removeFromErrorPath(collectionName);

             }

         }

     }

         /**

          * for issue KULRice 3072

          * 

          * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getgetPreserveLockingKeysOnCopy(java.lang.Class)

          */

         public boolean getPreserveLockingKeysOnCopy(Class businessObjectClass) {

                 boolean preserveLockingKeysOnCopy = false;

                 MaintenanceDocumentEntry docEntry = getMaintenanceDocumentEntry(businessObjectClass);

                 if (docEntry != null) {

                         preserveLockingKeysOnCopy = docEntry.getPreserveLockingKeysOnCopy();

                 }

                 return preserveLockingKeysOnCopy;

         }

         /**

          * for isue KULRice 3070

          * 

          * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getAllowsRecordDeletion(java.lang.Class)

          */

         public Boolean getAllowsRecordDeletion(Class businessObjectClass) {

                 Boolean allowsRecordDeletion = Boolean.FALSE;

                 MaintenanceDocumentEntry docEntry = getMaintenanceDocumentEntry(businessObjectClass);

                 if (docEntry != null) {

                         allowsRecordDeletion = Boolean.valueOf(docEntry.getAllowsRecordDeletion());

                 }

                 return allowsRecordDeletion;

         }

         /**

          *  for issue KULRice3070, see if need delete button

          * 

          * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#getAllowsRecordDeletion(org.kuali.rice.kns.document.MaintenanceDocument)

          */

         public Boolean getAllowsRecordDeletion(MaintenanceDocument document) {

         return document != null ? this.getAllowsRecordDeletion(document.getNewMaintainableObject().getBoClass()) : Boolean.FALSE;

         }

         /**

          * @see org.kuali.rice.kns.service.MaintenanceDocumentDictionaryService#translateCodes(java.lang.Class)

          */

         public Boolean translateCodes(Class businessObjectClass) {

                 boolean translateCodes = false;

                 MaintenanceDocumentEntry docEntry = getMaintenanceDocumentEntry(businessObjectClass);

                 if (docEntry != null) {

                         translateCodes = docEntry.isTranslateCodes();

                 }

                 return translateCodes;

         }

 }