/*

  * Copyright 2007-2010 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.datadictionary;

 import java.util.HashMap;

 import java.util.HashSet;

 import java.util.List;

 import java.util.Map;

 import java.util.Set;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.springframework.beans.factory.support.DefaultListableBeanFactory;

 /**

  * Encapsulates a set of statically generated (typically during startup)

  * DataDictionary indexes 

  * 

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

  */

 public class DataDictionaryIndex implements Runnable {

         private static final Log LOG = LogFactory.getLog(DataDictionaryIndex.class);

         private DefaultListableBeanFactory ddBeans;

         // keyed by BusinessObject class

         private Map<String, BusinessObjectEntry> businessObjectEntries;

         // keyed by documentTypeName

         private Map<String, DocumentEntry> documentEntries;

         // keyed by other things

         private Map<Class, DocumentEntry> documentEntriesByBusinessObjectClass;

         private Map<Class, DocumentEntry> documentEntriesByMaintainableClass;

         private Map<String, DataDictionaryEntry> entriesByJstlKey;

         // keyed by a class object, and the value is a set of classes that may block the class represented by the key from inactivation 

         private Map<Class, Set<InactivationBlockingMetadata>> inactivationBlockersForClass;

         public DataDictionaryIndex(DefaultListableBeanFactory ddBeans) {

                 this.ddBeans = ddBeans;

         }

         public Map<String, BusinessObjectEntry> getBusinessObjectEntries() {

                 return this.businessObjectEntries;

         }

         public Map<String, DocumentEntry> getDocumentEntries() {

                 return this.documentEntries;

         }

         public Map<Class, DocumentEntry> getDocumentEntriesByBusinessObjectClass() {

                 return this.documentEntriesByBusinessObjectClass;

         }

         public Map<Class, DocumentEntry> getDocumentEntriesByMaintainableClass() {

                 return this.documentEntriesByMaintainableClass;

         }

         public Map<String, DataDictionaryEntry> getEntriesByJstlKey() {

                 return this.entriesByJstlKey;

         }

         public Map<Class, Set<InactivationBlockingMetadata>> getInactivationBlockersForClass() {

                 return this.inactivationBlockersForClass;

         }

         private void buildDDIndicies() {

         // primary indices

         businessObjectEntries = new HashMap<String, BusinessObjectEntry>();

         documentEntries = new HashMap<String, DocumentEntry>();

         // alternate indices

         documentEntriesByBusinessObjectClass = new HashMap<Class, DocumentEntry>();

         documentEntriesByMaintainableClass = new HashMap<Class, DocumentEntry>();

         entriesByJstlKey = new HashMap<String, DataDictionaryEntry>();

         // loop over all beans in the context

         Map<String,BusinessObjectEntry> boBeans = ddBeans.getBeansOfType(BusinessObjectEntry.class);

         for ( BusinessObjectEntry entry : boBeans.values() ) {

             //String entryName = (entry.getBaseBusinessObjectClass() != null) ? entry.getBaseBusinessObjectClass().getName() : entry.getBusinessObjectClass().getName();

             if ((businessObjectEntries.get(entry.getJstlKey()) != null) 

                     && !((BusinessObjectEntry)businessObjectEntries.get(entry.getJstlKey())).getBusinessObjectClass().equals(entry.getBusinessObjectClass())) {

                 throw new DataDictionaryException(new StringBuffer("Two business object classes may not share the same jstl key: this=").append(entry.getBusinessObjectClass()).append(" / existing=").append(((BusinessObjectEntry)businessObjectEntries.get(entry.getJstlKey())).getBusinessObjectClass()).toString());

             }

             businessObjectEntries.put(entry.getBusinessObjectClass().getName(), entry);

             businessObjectEntries.put(entry.getBusinessObjectClass().getSimpleName(), entry);

             // If a "base" class is defined for the entry, index the entry by that class as well.

             if (entry.getBaseBusinessObjectClass() != null) {

                 businessObjectEntries.put(entry.getBaseBusinessObjectClass().getName(), entry);

                 businessObjectEntries.put(entry.getBaseBusinessObjectClass().getSimpleName(), entry);

             }

             entriesByJstlKey.put(entry.getJstlKey(), entry);

         }

         Map<String,DocumentEntry> docBeans = ddBeans.getBeansOfType(DocumentEntry.class);

         for ( DocumentEntry entry : docBeans.values() ) {

             String entryName = entry.getDocumentTypeName();

             if ((entry instanceof TransactionalDocumentEntry) 

                     && (documentEntries.get(entry.getFullClassName()) != null) 

                     && !((DocumentEntry)documentEntries.get(entry.getFullClassName())).getDocumentTypeName()

                             .equals(entry.getDocumentTypeName())) {

                 throw new DataDictionaryException(new StringBuffer("Two transactional document types may not share the same document class: this=")

                         .append(entry.getDocumentTypeName())

                         .append(" / existing=")

                         .append(((DocumentEntry)documentEntries.get(entry.getDocumentClass().getName())).getDocumentTypeName()).toString());

             }

             if ((entriesByJstlKey.get(entry.getJstlKey()) != null) && !((DocumentEntry)documentEntries.get(entry.getJstlKey())).getDocumentTypeName().equals(entry.getDocumentTypeName())) {

                 throw new DataDictionaryException(new StringBuffer("Two document types may not share the same jstl key: this=").append(entry.getDocumentTypeName()).append(" / existing=").append(((DocumentEntry)documentEntries.get(entry.getJstlKey())).getDocumentTypeName()).toString());

             }

             documentEntries.put(entryName, entry);

             //documentEntries.put(entry.getFullClassName(), entry);

             documentEntries.put(entry.getDocumentClass().getName(), entry);

             if (entry.getBaseDocumentClass() != null) {

                     documentEntries.put(entry.getBaseDocumentClass().getName(), entry);

             }

             entriesByJstlKey.put(entry.getJstlKey(), entry);

             if (entry instanceof TransactionalDocumentEntry) {

                 TransactionalDocumentEntry tde = (TransactionalDocumentEntry) entry;

                 documentEntries.put(tde.getDocumentClass().getSimpleName(), entry);

                 if (tde.getBaseDocumentClass() != null) {

                         documentEntries.put(tde.getBaseDocumentClass().getSimpleName(), entry);

                 }

             }

             if (entry instanceof MaintenanceDocumentEntry) {

                 MaintenanceDocumentEntry mde = (MaintenanceDocumentEntry) entry;

                 documentEntriesByBusinessObjectClass.put(mde.getBusinessObjectClass(), entry);

                 documentEntriesByMaintainableClass.put(mde.getMaintainableClass(), entry);

                 documentEntries.put(mde.getBusinessObjectClass().getSimpleName() + "MaintenanceDocument", entry);

             }

         }

     }

     private void buildDDInactivationBlockingIndices() {

         inactivationBlockersForClass = new HashMap<Class, Set<InactivationBlockingMetadata>>();

         Map<String,BusinessObjectEntry> boBeans = ddBeans.getBeansOfType(BusinessObjectEntry.class);

         for ( BusinessObjectEntry entry : boBeans.values() ) {

             List<InactivationBlockingDefinition> inactivationBlockingDefinitions = entry.getInactivationBlockingDefinitions();

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

                 for (InactivationBlockingDefinition inactivationBlockingDefinition : inactivationBlockingDefinitions) {

                     registerInactivationBlockingDefinition(inactivationBlockingDefinition);

                 }

             }

         }

     }

     private void registerInactivationBlockingDefinition(InactivationBlockingDefinition inactivationBlockingDefinition) {

         Set<InactivationBlockingMetadata> inactivationBlockingDefinitions = inactivationBlockersForClass.get(inactivationBlockingDefinition.getBlockedBusinessObjectClass());

         if (inactivationBlockingDefinitions == null) {

             inactivationBlockingDefinitions = new HashSet<InactivationBlockingMetadata>();

             inactivationBlockersForClass.put(inactivationBlockingDefinition.getBlockedBusinessObjectClass(), inactivationBlockingDefinitions);

         }

         boolean duplicateAdd = ! inactivationBlockingDefinitions.add(inactivationBlockingDefinition);

         if (duplicateAdd) {

             throw new DataDictionaryException("Detected duplicate InactivationBlockingDefinition for class " + inactivationBlockingDefinition.getBlockingReferenceBusinessObjectClass().getClass().getName());

         }

     }

     public void run() {

         LOG.info( "Starting DD Index Building" );

         buildDDIndicies();

         LOG.info( "Completed DD Index Building" );

 //        LOG.info( "Starting DD Validation" );

 //        validateDD();

 //        LOG.info( "Ending DD Validation" );

         LOG.info( "Started DD Inactivation Blocking Index Building" );

         buildDDInactivationBlockingIndices();

         LOG.info( "Completed DD Inactivation Blocking Index Building" );

     }

 }