/*
 * 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.hql.internal.ast.tree;

import org.hibernate.type.Type;

import antlr.SemanticException;

Contract for nodes representing operators (logic or arithmetic).
Author:
Steve Ebersole/**
 * Contract for nodes representing operators (logic or arithmetic).
 *
 * @author Steve Ebersole
 */
public interface OperatorNode {
	
Called by the tree walker during hql-sql semantic analysis
after the operator sub-tree is completely built.
/**
	 * Called by the tree walker during hql-sql semantic analysis
	 * after the operator sub-tree is completely built.
	 */
	public abstract void initialize() throws SemanticException;

	
Retrieves the data type for the overall operator expression.
Returns:
The expression's data type./**
	 * Retrieves the data type for the overall operator expression.
	 *
	 * @return The expression's data type.
	 */
	public Type getDataType();
}