/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package com.akiban.sql.parser;
import com.akiban.sql.StandardException;
public class IsNode extends BinaryLogicalOperatorNode
{
private boolean notMe; // set to true if we're to negate the sense of this node
/**
* Initializer for an IsNode
*
* @param leftOperand The left operand of the IS
* @param rightOperand The right operand of the IS
* @param notMe Whether to reverse the sense of this node.
*/
public void init(Object leftOperand,
Object rightOperand) {
super.init(leftOperand, rightOperand, "is");
}
/**
* Fill this node with a deep copy of the given node.
*/
public void copyFrom(QueryTreeNode node) throws StandardException {
super.copyFrom(node);
IsNode other = (IsNode)node;
this.notMe = other.notMe;
}
public boolean isNegated() {
return notMe;
}
public void toggleNegated() {
notMe = !notMe;
}
}