/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.magma.database.openjpa;

import javax.persistence.GeneratedValue;
import javax.persistence.Version;
import javax.persistence.Entity;

import org.apache.magma.beans.MagReadOnly;

/**
 * Provides by default a version field to those entities missing it.
 *
 * @author Simone Gianni <simoneg@apache.org>
 */

public aspect InstallVersionByDefault {

	/**
	 * Marker interface for beans receiving the default version field.
	 *
	 * @author Simone Gianni <simoneg@apache.org>
	 */
	public static interface WithDefaultVersion {
		
		public long getVersion();
		public void setVersion(long newVersion);
		
	}
	
	declare parents : ((@Entity *) && !(@NoVersion *) && !hasmethod(@Version public * get*()) && !hasfield(@Version * *)) implements WithDefaultVersion;
	//declare parents : ((@Entity *) && !(@NoVersion *)) implements WithDefaultVersion;
	
	/**
	 * The default version field.
	 */
	private long WithDefaultVersion.version;
	
	/**
	 * Getter for the default version field.
	 * @return The version of the bean.
	 */
	@Version
	@MagReadOnly
	public long WithDefaultVersion.getVersion() {
		return version;
	}
	
	/**
	 * Setter for the default version field.
	 * @param newVersion The new version of the bean.
	 */
	public void WithDefaultVersion.setVersion(long newVersion) {
		version = newVersion;
	}
	
	
}