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Hibernate example source code file (BetweenOperatorNode.java)

This example Hibernate source code file (BetweenOperatorNode.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

betweenoperatornode, expectedtypeawarenode, node, node, operatornode, semanticexception, semanticexception, sqlnode, sqlnode, type, type

The Hibernate BetweenOperatorNode.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, 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.hql.internal.ast.tree;

import antlr.SemanticException;

import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.Type;

/**
 * Contract for nodes representing logical BETWEEN (ternary) operators.
 *
 * @author Steve Ebersole
 */
public class BetweenOperatorNode extends SqlNode implements OperatorNode {

	public void initialize() throws SemanticException {
		Node fixture = getFixtureOperand();
		if ( fixture == null ) {
			throw new SemanticException( "fixture operand of a between operator was null" );
		}
		Node low = getLowOperand();
		if ( low == null ) {
			throw new SemanticException( "low operand of a between operator was null" );
		}
		Node high = getHighOperand();
		if ( high == null ) {
			throw new SemanticException( "high operand of a between operator was null" );
		}
		check( fixture, low, high );
		check( low, high, fixture );
		check( high, fixture, low );
	}

	public Type getDataType() {
		// logic operators by definition resolve to boolean.
		return StandardBasicTypes.BOOLEAN;
	}

	public Node getFixtureOperand() {
		return ( Node ) getFirstChild();
	}

	public Node getLowOperand() {
		return ( Node ) getFirstChild().getNextSibling();
	}

	public Node getHighOperand() {
		return ( Node ) getFirstChild().getNextSibling().getNextSibling();
	}

	private void check(Node check, Node first, Node second) {
		if ( ExpectedTypeAwareNode.class.isAssignableFrom( check.getClass() ) ) {
			Type expectedType = null;
			if ( SqlNode.class.isAssignableFrom( first.getClass() ) ) {
				expectedType = ( ( SqlNode ) first ).getDataType();
			}
			if ( expectedType == null && SqlNode.class.isAssignableFrom( second.getClass() ) ) {
				expectedType = ( ( SqlNode ) second ).getDataType();
			}
			( ( ExpectedTypeAwareNode ) check ).setExpectedType( expectedType );
		}
	}
}

Other Hibernate examples (source code examples)

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