/*******************************************************************************
 * Copyright (c) 2009, 2010 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.jpa.ui.internal.commands;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jpt.jpa.core.JpaProject;
import org.eclipse.jpt.jpa.core.JptJpaCorePlugin;
import org.eclipse.jpt.jpa.core.context.XmlFile;
import org.eclipse.jpt.jpa.core.resource.xml.JpaRootEObject;
import org.eclipse.jpt.jpa.core.resource.xml.JpaXmlResource;
import org.eclipse.ui.handlers.HandlerUtil;

public class UpgradeXmlFileVersionHandler extends AbstractHandler
{
	public Object execute(ExecutionEvent event) throws ExecutionException {
		IStructuredSelection selection 
			= (IStructuredSelection) HandlerUtil.getCurrentSelectionChecked(event);

		for (Object selectedObject : selection.toArray()) {
			upgradeXmlFileVersion(selectedObject);
		}
		return null;
	}

	protected void upgradeXmlFileVersion(Object selectedObject) {
		JpaXmlResource xmlResource = 
			(JpaXmlResource) Platform.getAdapterManager().getAdapter(selectedObject, JpaXmlResource.class);
		if (xmlResource == null) {
			XmlFile xmlFile = 
				(XmlFile) Platform.getAdapterManager().getAdapter(selectedObject, XmlFile.class);
			if (xmlFile != null) {
				xmlResource = xmlFile.getXmlResource();
			}
		}
		if (xmlResource == null) {
			return;
		}

		final JpaRootEObject root = xmlResource.getRootObject();
		IContentType contentType = xmlResource.getContentType();
		JpaProject jpaProject = JptJpaCorePlugin.getJpaProject(xmlResource.getProject());
		final String newVersion = jpaProject.getJpaPlatform().getMostRecentSupportedResourceType(contentType).getVersion();

		xmlResource.modify(
			new Runnable() {
				public void run() {
					root.setVersion(newVersion);
				}
			});
	}
}