BindVariableExpression.java

/*******************************************************************************
 * 
 * Copyright (c) 2012 GigaSpaces Technologies Ltd. All rights reserved
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *  
 ******************************************************************************/
package org.openspaces.jpa.openjpa.query;

import org.apache.openjpa.kernel.exps.Expression;
import org.apache.openjpa.kernel.exps.ExpressionVisitor;

/**
 * Represents a JPQL bound variable expression node.
 * OpenJPA adds this dummy node containing the mapping info when a property is JOINED.
 * The node is translated to a "1 = 1" expression.
 * 
 * @author Idan Moyal
 * @since 8.0
 *
 */
public class BindVariableExpression implements Expression, ExpressionNode {
    //
    private static final long serialVersionUID = 1L;
    
    public BindVariableExpression() {
    }
    
    public void appendSql(StringBuilder sql) {
        sql.append("1 = 1");            
    }

    public NodeType getNodeType() {
        return NodeType.VARIABLE_BINDING;
    }

    public void acceptVisit(ExpressionVisitor arg0) {
    }

}