/*

 Wotonomy: OpenStep design patterns for pure Java applications.

 Copyright (C) 2001 Intersect Software Corporation

 This library is free software; you can redistribute it and/or

 modify it under the terms of the GNU Lesser General Public

 License as published by the Free Software Foundation; either

 version 2.1 of the License, or (at your option) any later version.

 This library is distributed in the hope that it will be useful,

 but WITHOUT ANY WARRANTY; without even the implied warranty of

 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public

 License along with this library; if not, see http://www.gnu.org

 */

 package net.wotonomy.access;

 import net.wotonomy.control.EOClassDescription;

 import net.wotonomy.control.EOEditingContext;

 import net.wotonomy.control.EOFetchSpecification;

 import net.wotonomy.control.EOGenericRecord;

 import net.wotonomy.control.EOGlobalID;

 import net.wotonomy.foundation.NSArray;

 import net.wotonomy.foundation.NSMutableArray;

 /**

 * @author ezamudio@nasoft.com

 * @author $Author: cgruber $

 * @version $Revision: 894 $

 */

 public class EOEntityClassDescription extends EOClassDescription {

         protected EOEntity _entity;

         public EOEntityClassDescription() {

                 super();

         }

         public EOEntityClassDescription(EOEntity entity) {

                 this();

                 _entity = entity;

         }

         public NSArray allAttributeKeys() {

                 NSArray arr = entity().attributes();

                 NSMutableArray a = new NSMutableArray(arr.count());

                 for (int i = 0; i < arr.count(); i++) {

                         EOAttribute atrib = (EOAttribute)arr.objectAtIndex(i);

                         a.addObject(atrib);

                 }

                 return a;

         }

         public NSArray allPropertyKeys() {

                 return entity().classPropertyNames();

         }

         public NSArray allToManyRelationshipKeys() {

                 NSArray arr = entity().relationships();

                 NSMutableArray a = new NSMutableArray(arr.count());

                 for (int i = 0; i < arr.count(); i++) {

                         EORelationship r = (EORelationship)arr.objectAtIndex(i);

                         if (r.isToMany())

                                 a.addObject(r);

                 }

                 return a;

         }

         public NSArray allToOneRelationshipKeys() {

                 NSArray arr = entity().relationships();

                 NSMutableArray a = new NSMutableArray(arr.count());

                 for (int i = 0; i < arr.count(); i++) {

                         EORelationship r = (EORelationship)arr.objectAtIndex(i);

                         if (!r.isToMany())

                                 a.addObject(r);

                 }

                 return a;

         }

         /** Returns all attributes that correspond to columns

          * in a database table.

          */

         public NSArray attributeKeys() {

                 NSArray arr = entity().attributes();

                 NSMutableArray a = new NSMutableArray(arr.count());

                 for (int i = 0; i < arr.count(); i++) {

                         EOAttribute atrib = (EOAttribute)arr.objectAtIndex(i);

                         if (!atrib.isDerived())

                                 a.addObject(atrib);

                 }

                 return a;

         }

         public EOClassDescription classDescriptionForDestinationKey(String key) {

                 EORelationship r = entity().relationshipNamed(key);

                 if (r == null)

                         return null;

                 return r.destinationEntity().classDescriptionForInstances();

         }

         public NSArray clientAttributeKeys() {

                 return null;

         }

         public NSArray clientToManyRelationshipKeys() {

                 return null;

         }

         public NSArray clientToOneRelationshipKeys() {

                 return null;

         }

         public EOEntity entity() {

                 return _entity;

         }

         public String entityName() {

                 return _entity.name();

         }

         public EOFetchSpecification fetchSpecificationNamed(String name) {

                 return entity().fetchSpecificationNamed(name);

         }

         public NSArray toManyRelationshipKeys() {

                 NSArray arr = entity().relationships();

                 NSMutableArray a = new NSMutableArray(arr.count());

                 for (int i = 0; i < arr.count(); i++) {

                         EORelationship r = (EORelationship)arr.objectAtIndex(i);

                         if (r.isToMany() && !r.isFlattened())

                                 a.addObject(r);

                 }

                 return a;

         }

         public NSArray toOneRelationshipKeys() {

                 NSArray arr = entity().relationships();

                 NSMutableArray a = new NSMutableArray(arr.count());

                 for (int i = 0; i < arr.count(); i++) {

                         EORelationship r = (EORelationship)arr.objectAtIndex(i);

                         if (!r.isToMany() && !r.isFlattened())

                                 a.addObject(r);

                 }

                 return a;

         }

         public Object createInstanceWithEditingContext(EOEditingContext ec, EOGlobalID gid) {

                 if  (theClass == null) {

                         try {

                                 theClass = Class.forName(entity().className());

                         } catch (ClassNotFoundException ex) {

                                 if (entity().className().equals("net.wotonomy.control.EOGenericRecord"))

                                         throw new IllegalArgumentException("Cannot find class " + entity().className());

                                 theClass = EOGenericRecord.class;

                         }

                 }

                 return super.createInstanceWithEditingContext(ec, gid);

         }

 }

 /*

  * $Log$

  * Revision 1.2  2006/02/16 16:47:13  cgruber

  * Move some classes in to "internal" packages and re-work imports, etc.

  *

  * Also use UnsupportedOperationExceptions where appropriate, instead of WotonomyExceptions.

  *

  * Revision 1.1  2006/02/16 13:19:57  cgruber

  * Check in all sources in eclipse-friendly maven-enabled packages.

  *

  * Revision 1.4  2003/08/19 01:55:54  chochos

  * the behavior is now more consistent with its Apple counterpart.

  *

  * Revision 1.3  2003/08/09 01:40:31  chochos

  * use EOClassDescription's methods to get a destination entity's class description.

  *

  * Revision 1.2  2003/08/08 05:51:59  chochos

  * createInstanceWithEditingContext now works. It sets theClass with the class from the entity className() before calling super.

  *

  * Revision 1.1  2003/08/08 00:36:19  chochos

  * concrete implementation of EOClassDescription that uses an EOEntity

  *

  */