alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Hibernate example source code file (FkSecondPass.java)

This example Hibernate source code file (FkSecondPass.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

atomicinteger, atomicinteger, ejb3joincolumn, ejb3joincolumn, fksecondpass, fksecondpass, secondpass, simplevalue, simplevalue, string, value

The Hibernate FkSecondPass.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.cfg;
import java.util.concurrent.atomic.AtomicInteger;
import org.hibernate.mapping.SimpleValue;
import org.hibernate.mapping.Value;

/**
 * @author Emmanuel Bernard
 */
public abstract class FkSecondPass implements SecondPass {
	protected SimpleValue value;
	protected Ejb3JoinColumn[] columns;
	/**
	 * unique counter is needed to differentiate 2 instances of FKSecondPass
	 * as they are compared.
	 * Fairly hacky but IBM VM sometimes returns the same hashCode for 2 different objects
	 * TODO is it doable to rely on the Ejb3JoinColumn names? Not sure at they could be inferred
	 */
	private int uniqueCounter;
	private static AtomicInteger globalCounter = new AtomicInteger();

	public FkSecondPass(SimpleValue value, Ejb3JoinColumn[] columns) {
		this.value = value;
		this.columns = columns;
		this.uniqueCounter = globalCounter.getAndIncrement();
	}

	public int getUniqueCounter() {
		return uniqueCounter;
	}

	public Value getValue() {
		return value;
	}

	public boolean equals(Object o) {
		if ( this == o ) return true;
		if ( !( o instanceof FkSecondPass ) ) return false;

		FkSecondPass that = (FkSecondPass) o;

		if ( uniqueCounter != that.uniqueCounter ) return false;

		return true;
	}

	public int hashCode() {
		return uniqueCounter;
	}

	public abstract String getReferencedEntityName();

	public abstract boolean isInPrimaryKey();
}

Other Hibernate examples (source code examples)

Here is a short list of links related to this Hibernate FkSecondPass.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.