Hibernate example source code file (AbstractType.java)

This example Hibernate source code file (AbstractType.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

associationtype, element, hibernateexception, hibernateexception, io, jdbc, legacy_default_size, object, object, serializable, sessionfactoryimplementor, sessionimplementor, sessionimplementor, size, size, sql, type, util

The Hibernate AbstractType.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.type;

import java.io.Serializable;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Map;

import org.dom4j.Element;
import org.dom4j.Node;

import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.internal.util.compare.EqualsHelper;
import org.hibernate.metamodel.relational.Size;

/**
 * Abstract superclass of the built in Type hierarchy.
 * 
 * @author Gavin King
 */
public abstract class AbstractType implements Type {
	protected static final Size LEGACY_DICTATED_SIZE = new Size();
	protected static final Size LEGACY_DEFAULT_SIZE = new Size( 19, 2, 255, Size.LobMultiplier.NONE ); // to match legacy behavior

	public boolean isAssociationType() {
		return false;
	}

	public boolean isCollectionType() {
		return false;
	}

	public boolean isComponentType() {
		return false;
	}

	public boolean isEntityType() {
		return false;
	}
	
	public boolean isXMLElement() {
		return false;
	}

	public int compare(Object x, Object y) {
		return ( (Comparable) x ).compareTo(y);
	}

	public Serializable disassemble(Object value, SessionImplementor session, Object owner)
	throws HibernateException {

		if (value==null) {
			return null;
		}
		else {
			return (Serializable) deepCopy( value, session.getFactory() );
		}
	}

	public Object assemble(Serializable cached, SessionImplementor session, Object owner)
	throws HibernateException {
		if ( cached==null ) {
			return null;
		}
		else {
			return deepCopy( cached, session.getFactory() );
		}
	}

	public boolean isDirty(Object old, Object current, SessionImplementor session) throws HibernateException {
		return !isSame( old, current );
	}

	public Object hydrate(
		ResultSet rs,
		String[] names,
		SessionImplementor session,
		Object owner)
	throws HibernateException, SQLException {
		// TODO: this is very suboptimal for some subclasses (namely components),
		// since it does not take advantage of two-phase-load
		return nullSafeGet(rs, names, session, owner);
	}

	public Object resolve(Object value, SessionImplementor session, Object owner)
	throws HibernateException {
		return value;
	}

	public Object semiResolve(Object value, SessionImplementor session, Object owner) 
	throws HibernateException {
		return value;
	}
	
	public boolean isAnyType() {
		return false;
	}

	public boolean isModified(Object old, Object current, boolean[] checkable, SessionImplementor session)
	throws HibernateException {
		return isDirty(old, current, session);
	}
	
	public boolean isSame(Object x, Object y) throws HibernateException {
		return isEqual(x, y );
	}

	public boolean isEqual(Object x, Object y) {
		return EqualsHelper.equals(x, y);
	}
	
	public int getHashCode(Object x) {
		return x.hashCode();
	}

	public boolean isEqual(Object x, Object y, SessionFactoryImplementor factory) {
		return isEqual(x, y );
	}
	
	public int getHashCode(Object x, SessionFactoryImplementor factory) {
		return getHashCode(x );
	}
	
	protected static void replaceNode(Node container, Element value) {
		if ( container!=value ) { //not really necessary, I guess...
			Element parent = container.getParent();
			container.detach();
			value.setName( container.getName() );
			value.detach();
			parent.add(value);
		}
	}
	
	public Type getSemiResolvedType(SessionFactoryImplementor factory) {
		return this;
	}

	public Object replace(
			Object original, 
			Object target, 
			SessionImplementor session, 
			Object owner, 
			Map copyCache, 
			ForeignKeyDirection foreignKeyDirection) 
	throws HibernateException {
		boolean include;
		if ( isAssociationType() ) {
			AssociationType atype = (AssociationType) this;
			include = atype.getForeignKeyDirection()==foreignKeyDirection;
		}
		else {
			include = ForeignKeyDirection.FOREIGN_KEY_FROM_PARENT==foreignKeyDirection;
		}
		return include ? replace(original, target, session, owner, copyCache) : target;
	}

	public void beforeAssemble(Serializable cached, SessionImplementor session) {}

	/*public Object copy(Object original, Object target, SessionImplementor session, Object owner, Map copyCache)
	throws HibernateException {
		if (original==null) return null;
		return assemble( disassemble(original, session), session, owner );
	}*/

}