/******************************************************************************* | |
* 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; | |
import org.eclipse.persistence.expressions.*; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent a TRIM | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Generate the correct expression for TRIM | |
* </ul> | |
*/ | |
public class TrimNode extends StringFunctionNode { | |
private Node trimChar; | |
private boolean leading; | |
private boolean trailing; | |
private boolean both; | |
/** | |
* TrimNode constructor. | |
*/ | |
public TrimNode() { | |
super(); | |
} | |
/** | |
* 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.getStringType()); | |
} | |
if (trimChar != null) { | |
trimChar.validate(context); | |
trimChar.validateParameter(context, typeHelper.getCharType()); | |
} | |
setType(typeHelper.getStringType()); | |
} | |
/** | |
* INTERNAL | |
* Generate the TopLink expression for this node | |
*/ | |
public Expression generateExpression(GenerationContext context) { | |
Expression whereClause = getLeft().generateExpression(context); | |
if (leading) { | |
// use leftTrim | |
if (trimChar != null) { | |
Expression trimCharExpr = trimChar.generateExpression(context); | |
whereClause = whereClause.leftTrim(trimCharExpr); | |
} else { | |
whereClause = whereClause.leftTrim(); | |
} | |
} else if (trailing) { | |
if (trimChar != null) { | |
Expression trimCharExpr = trimChar.generateExpression(context); | |
whereClause = whereClause.rightTrim(trimCharExpr); | |
} else { | |
whereClause = whereClause.rightTrim(); | |
} | |
} else { | |
if (trimChar != null) { | |
Expression trimCharExpr = trimChar.generateExpression(context); | |
whereClause = whereClause.leftTrim(trimCharExpr).rightTrim(trimCharExpr); | |
} else { | |
whereClause = whereClause.leftTrim().rightTrim(); | |
} | |
} | |
return whereClause; | |
} | |
/** */ | |
public void setTrimChar(Node trimChar) { | |
this.trimChar = trimChar; | |
} | |
/** */ | |
public boolean isLeading() { | |
return leading; | |
} | |
/** */ | |
public void setLeading(boolean newLeading) { | |
this.leading = newLeading; | |
} | |
/** */ | |
public boolean isTrailing() { | |
return trailing; | |
} | |
/** */ | |
public void setTrailing(boolean newTrailing) { | |
this.trailing = newTrailing; | |
} | |
/** */ | |
public boolean isBoth() { | |
return both; | |
} | |
/** */ | |
public void setBoth(boolean newBoth) { | |
this.both = newBoth; | |
} | |
} |