/*******************************************************************************
 * Copyright (c) 2006, 2007 Oracle. All rights reserved. This
 * program and the accompanying materials are made available under the terms of
 * the Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Oracle. - initial API and implementation
 *******************************************************************************/
package org.eclipse.jpt.core.internal.content.persistence;

import org.eclipse.emf.ecore.EFactory;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.jpt.core.internal.content.persistence.resource.PersistenceXmlResourceFactory;
import org.eclipse.wst.common.componentcore.internal.impl.WTPEntityResolver;
import org.eclipse.wst.common.internal.emf.utilities.DOMUtilities;
import org.eclipse.wst.common.internal.emf.utilities.ExtendedEcoreUtil;

public class PersistenceInit
{
	private static boolean initialized = false;
	
	public static void init() {
		init(true);
	}
	
	public static void init(boolean shouldPreregisterPackages) {
		if (! initialized) {
			initialized = true;
			DOMUtilities.setDefaultEntityResolver(WTPEntityResolver.INSTANCE);
			initResourceFactories();
		}
		if (shouldPreregisterPackages) {
			preregisterPackages();
		}
	}
	
	private static void initResourceFactories() {
		PersistenceXmlResourceFactory.register();
	}
	
	private static void preregisterPackages() {
		ExtendedEcoreUtil.preRegisterPackage(
			"packaging.xmi", //$NON-NLS-1$
			new EPackage.Descriptor() { 
				public EPackage getEPackage() {
					return PersistencePackage.eINSTANCE;
				}
				
				public EFactory getEFactory() {
					return PersistenceFactory.eINSTANCE;
				}
			}
		);
	}
}