/*******************************************************************************
 * 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.core.internal.resource.xml;

import org.eclipse.core.expressions.PropertyTester;
import org.eclipse.core.runtime.content.IContentType;
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.JpaXmlResource;

// TODO move to o.e.jpt.core.internal(.context)?
// rename to JpaXmlPropertyTester
public class JpaXmlResourcePropertyTester
	extends PropertyTester
{
	public static final String IS_LATEST_SUPPORTED_VERSION = "isLatestSupportedVersion"; //$NON-NLS-1$
	
	
	public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
		JpaXmlResource xmlResource = null;
		if (receiver instanceof JpaXmlResource) {
			xmlResource = (JpaXmlResource) receiver;
		}
		else if (receiver instanceof XmlFile) {
			xmlResource = ((XmlFile) receiver).getXmlResource();
		}
		else {
			return false;
		}
		
		if (IS_LATEST_SUPPORTED_VERSION.equals(property)) {
			boolean expected = ((Boolean) expectedValue).booleanValue();
			JpaProject jpaProject = JptJpaCorePlugin.getJpaProject(xmlResource.getProject());
			IContentType contentType = xmlResource.getContentType();
			boolean actual = 
					xmlResource.getVersion() != null
						&& xmlResource.getVersion().equals(
							jpaProject.getJpaPlatform().getMostRecentSupportedResourceType(contentType).getVersion());
			
			return actual == expected;
		}
		
		return false;
	}
}