/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.internal.jpa.parsing; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent a MOD | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Answer the correct expression for a MOD | |
* <li> Maintain the parts of a MOD statement | |
* | |
* e.g. | |
* SELECT ... FROM ... WHERE MOD(emp.salary, 2) > 1000 | |
* </ul> | |
* @author Jon Driscoll and Joel Lucuik | |
* @since TopLink 4.0 | |
*/ | |
import org.eclipse.persistence.expressions.*; | |
import org.eclipse.persistence.exceptions.JPQLException; | |
public class ModNode extends ArithmeticFunctionNode { | |
private Node denominator = null; | |
/** | |
* INTERNAL | |
* Check the child nodes for an unqualified field access and if so, | |
* replace it by a qualified field access. | |
*/ | |
public Node qualifyAttributeAccess(ParseTreeContext context) { | |
if (left != null) { | |
left = left.qualifyAttributeAccess(context); | |
} | |
if (denominator != null) { | |
denominator = denominator.qualifyAttributeAccess(context); | |
} | |
return this; | |
} | |
/** | |
* INTERNAL | |
* Validate node and calculate its type. | |
*/ | |
public void validate(ParseTreeContext context) { | |
TypeHelper typeHelper = context.getTypeHelper(); | |
if (left != null) { | |
left.validate(context); | |
left.validateParameter(context, typeHelper.getIntType()); | |
Object type = left.getType(); | |
if (!typeHelper.isIntegralType(type)) | |
throw JPQLException.invalidFunctionArgument( | |
context.getQueryInfo(), left.getLine(), left.getColumn(), | |
"MOD", left.getAsString(), "integral type"); | |
} | |
if (denominator != null) { | |
denominator.validate(context); | |
denominator.validateParameter(context, typeHelper.getIntType()); | |
Object denominatorType = denominator.getType(); | |
if (!typeHelper.isIntegralType(denominatorType)) | |
throw JPQLException.invalidFunctionArgument( | |
context.getQueryInfo(), denominator.getLine(), denominator.getColumn(), | |
"MOD", denominator.getAsString(), "integral type"); | |
} | |
setType(typeHelper.getIntType()); | |
} | |
/** */ | |
public Expression generateExpression(GenerationContext context) { | |
return ExpressionMath.mod(getLeft().generateExpression(context), | |
getDenominator().generateExpression(context)); | |
} | |
// Accessors | |
public Node getDenominator() { | |
return denominator; | |
} | |
public void setDenominator(Node denominator) { | |
this.denominator = denominator; | |
} | |
} |