Translatable.java

/*
 * 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.openjpa.persistence.inheritance.polymorphic;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.OneToMany;

/**
 * An abstract persistent class used as root of inheritance hierarchy and 
 * using table-per-concrete-class inheritance strategy.
 * 
 * For a more detailed description of the domain model to which this receiver
 * belongs
 * @see TestTablePerClassInheritanceWithAbstractRoot
 * 
 * @author Pinaki Poddar
 *
 */
@Entity
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
public abstract class Translatable extends BaseEntity {
	@OneToMany(mappedBy="translatable", cascade=CascadeType.PERSIST)
	private Set<Translation> translations;
	
	public void addTranslation(Translation t) {
		if (translations == null)
			translations = new HashSet<Translation>();
		translations.add(t);
	}
	
	public Set<Translation> getTranslations() {
		return Collections.unmodifiableSet(translations);
	}
}