oracle.toplink.essentials.internal.parsing.DivideNode Maven / Gradle / Ivy
/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
// Copyright (c) 1998, 2007, Oracle. All rights reserved.
package oracle.toplink.essentials.internal.parsing;
import oracle.toplink.essentials.expressions.*;
/**
* INTERNAL
* Purpose: Represent a '/' in EJBQL
*
Responsibilities:
* - Generate the correct expression for a '/'
*
* @author Jon Driscoll and Joel Lucuik
* @since July 2003
*/
public class DivideNode extends BinaryOperatorNode {
public DivideNode() {
super();
}
/**
* INTERNAL
* Validate node and calculates its type.
*/
public void validate(ParseTreeContext context) {
super.validate(context);
if ((left != null) && (right != null)) {
TypeHelper typeHelper = context.getTypeHelper();
setType(typeHelper.extendedBinaryNumericPromotion(
left.getType(), right.getType()));
}
}
/**
* INTERNAL
* Generate the expression. The steps are:
* 1. Generate the expression for the left node
* 2. Add the .divide to the where clause returned from step 1
* 3. Generate the expression for the right side and use it as the parameter for the .divide()
* 4. Return the completed where clause to the caller
*/
public Expression generateExpression(GenerationContext context) {
Expression whereClause = getLeft().generateExpression(context);
whereClause = ExpressionMath.divide(whereClause, getRight().generateExpression(context));
return whereClause;
}
public boolean isDivideNode() {
return true;
}
}