/*
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
 *
 */