Hibernate example source code file (MappedSuperclass.java)

This example Hibernate source code file (MappedSuperclass.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

arraylist, class, component, component, iterator, list, mappedsuperclass, mappedsuperclass, persistentclass, persistentclass, property, property, string, util

The Hibernate MappedSuperclass.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.mapping;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Represents a @MappedSuperclass.
 * A @MappedSuperclass can be a superclass of an @Entity (root or not)
 *
 * This class primary goal is to give a representation to @MappedSuperclass
 * in the metamodel in order to reflect them in the JPA 2 metamodel.
 *
 * Do not use outside this use case.
 *
 * 
 * A proper redesign will be evaluated in Hibernate 4
 *
 * Implementation details:
 * properties are copies of their closest sub-persistentClass versions
 *
 * @author Emmanuel Bernard
 */
public class MappedSuperclass {
	private final MappedSuperclass superMappedSuperclass;
	private final PersistentClass superPersistentClass;
	private final List declaredProperties;
	private Class mappedClass;
	private Property identifierProperty;
	private Property version;
	private Component identifierMapper;

	public MappedSuperclass(MappedSuperclass superMappedSuperclass, PersistentClass superPersistentClass) {
		this.superMappedSuperclass = superMappedSuperclass;
		this.superPersistentClass = superPersistentClass;
		this.declaredProperties = new ArrayList();
	}

	/**
	 * Returns the first superclass marked as @MappedSuperclass or null if:
	 *  - none exists
	 *  - or the first persistent superclass found is an @Entity
	 *
	 * @return the super MappedSuperclass
	 */
	public MappedSuperclass getSuperMappedSuperclass() {
		return superMappedSuperclass;
	}

	public boolean hasIdentifierProperty() {
		return getIdentifierProperty() != null;
	}

	public boolean isVersioned() {
		return getVersion() != null;
	}

	/**
	 * Returns the PersistentClass of the first superclass marked as @Entity
	 * or null if none exists
	 *
	 * @return the PersistentClass of the superclass
	 */
	public PersistentClass getSuperPersistentClass() {
		return superPersistentClass;
	}

	public Iterator getDeclaredPropertyIterator() {
		return declaredProperties.iterator();
	}

	public void addDeclaredProperty(Property p) {
		//Do not add duplicate properties
		//TODO is it efficient enough?
		String name = p.getName();
		Iterator it = declaredProperties.iterator();
		while (it.hasNext()) {
			if ( name.equals( ((Property)it.next()).getName() ) ) {
				return;
			}
		}
		declaredProperties.add(p);
	}

	public Class getMappedClass() {
		return mappedClass;
	}

	public void setMappedClass(Class mappedClass) {
		this.mappedClass = mappedClass;
	}

	public Property getIdentifierProperty() {
		//get direct identifiermapper or the one from the super mappedSuperclass
		// or the one from the super persistentClass
		Property propagatedIdentifierProp = identifierProperty;
		if ( propagatedIdentifierProp == null ) {
			if ( superMappedSuperclass != null ) {
				propagatedIdentifierProp = superMappedSuperclass.getIdentifierProperty();
			}
			if (propagatedIdentifierProp == null && superPersistentClass != null){
				propagatedIdentifierProp = superPersistentClass.getIdentifierProperty();
			}
		}
		return propagatedIdentifierProp;
	}

	public Property getDeclaredIdentifierProperty() {
		return identifierProperty;
	}

	public void setDeclaredIdentifierProperty(Property prop) {
		this.identifierProperty = prop;
	}

	public Property getVersion() {
		//get direct version or the one from the super mappedSuperclass
		// or the one from the super persistentClass
		Property propagatedVersion = version;
		if (propagatedVersion == null) {
			if ( superMappedSuperclass != null ) {
				propagatedVersion = superMappedSuperclass.getVersion();
			}
			if (propagatedVersion == null && superPersistentClass != null){
				propagatedVersion = superPersistentClass.getVersion();
			}
		}
		return propagatedVersion;
	}

	public Property getDeclaredVersion() {
		return version;
	}

	public void setDeclaredVersion(Property prop) {
		this.version = prop;
	}

	public Component getIdentifierMapper() {
		//get direct identifiermapper or the one from the super mappedSuperclass
		// or the one from the super persistentClass
		Component propagatedMapper = identifierMapper;
		if ( propagatedMapper == null ) {
			if ( superMappedSuperclass != null ) {
				propagatedMapper = superMappedSuperclass.getIdentifierMapper();
			}
			if (propagatedMapper == null && superPersistentClass != null){
				propagatedMapper = superPersistentClass.getIdentifierMapper();
			}
		}
		return propagatedMapper;
	}

	public Component getDeclaredIdentifierMapper() {
		return identifierMapper;
	}

	public void setDeclaredIdentifierMapper(Component identifierMapper) {
		this.identifierMapper = identifierMapper;
	}
}