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/*
 * 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 TRIM *

Responsibilities:

    *
  • Generate the correct expression for TRIM *
*/ 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; } }




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