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Hibernate example source code file (Junction.java)

This example Hibernate source code file (Junction.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, arraylist, criteriaquery, criterion, hibernateexception, iterator, junction, junction, list, string, string, stringbuffer, typedvalue, typedvalue, util

The Hibernate Junction.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
 *
 * 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.criterion;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.internal.util.StringHelper;

/**
 * A sequence of a logical expressions combined by some
 * associative logical operator
 *
 * @author Gavin King
 */
public class Junction implements Criterion {

	private final List criteria = new ArrayList();
	private final String op;
	
	protected Junction(String op) {
		this.op = op;
	}
	
	public Junction add(Criterion criterion) {
		criteria.add(criterion);
		return this;
	}

	public String getOp() {
		return op;
	}

	public TypedValue[] getTypedValues(Criteria crit, CriteriaQuery criteriaQuery)
	throws HibernateException {
		ArrayList typedValues = new ArrayList();
		Iterator iter = criteria.iterator();
		while ( iter.hasNext() ) {
			TypedValue[] subvalues = ( (Criterion) iter.next() ).getTypedValues(crit, criteriaQuery);
			for ( int i=0; i<subvalues.length; i++ ) {
				typedValues.add( subvalues[i] );
			}
		}
		return (TypedValue[]) typedValues.toArray( new TypedValue[ typedValues.size() ] );
	}

	public String toSqlString(Criteria crit, CriteriaQuery criteriaQuery)
	throws HibernateException {

		if ( criteria.size()==0 ) return "1=1";

		StringBuffer buffer = new StringBuffer()
			.append('(');
		Iterator iter = criteria.iterator();
		while ( iter.hasNext() ) {
			buffer.append( ( (Criterion) iter.next() ).toSqlString(crit, criteriaQuery) );
			if ( iter.hasNext() ) buffer.append(' ').append(op).append(' ');
		}
		return buffer.append(')').toString();
	}

	/**
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		return '(' + StringHelper.join( ' ' + op + ' ', criteria.iterator() ) + ')';
	}

}

Other Hibernate examples (source code examples)

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

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