001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * // Copyright (c) 1998, 2007, Oracle. All rights reserved.
005: *
006: *
007: * The contents of this file are subject to the terms of either the GNU
008: * General Public License Version 2 only ("GPL") or the Common Development
009: * and Distribution License("CDDL") (collectively, the "License"). You
010: * may not use this file except in compliance with the License. You can obtain
011: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
012: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
013: * language governing permissions and limitations under the License.
014: *
015: * When distributing the software, include this License Header Notice in each
016: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
017: * Sun designates this particular file as subject to the "Classpath" exception
018: * as provided by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the License
020: * Header, with the fields enclosed by brackets [] replaced by your own
021: * identifying information: "Portions Copyrighted [year]
022: * [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * If you wish your version of this file to be governed by only the CDDL or
027: * only the GPL Version 2, indicate your decision by adding "[Contributor]
028: * elects to include this software in this distribution under the [CDDL or GPL
029: * Version 2] license." If you don't indicate a single choice of license, a
030: * recipient has the option to distribute your version of this file under
031: * either the CDDL, the GPL Version 2 or to extend the choice of license to
032: * its licensees as provided above. However, if you add GPL Version 2 code
033: * and therefore, elected the GPL Version 2 license, then the option applies
034: * only if the new code is made subject to such option by the copyright
035: * holder.
036: */
037: package oracle.toplink.essentials.internal.parsing;
038:
039: import oracle.toplink.essentials.expressions.*;
040:
041: /**
042: * INTERNAL
043: * <p><b>Purpose</b>: Represent a TRIM
044: * <p><b>Responsibilities</b>:<ul>
045: * <li> Generate the correct expression for TRIM
046: * </ul>
047: */
048: public class TrimNode extends StringFunctionNode {
049:
050: private Node trimChar;
051: private boolean leading;
052: private boolean trailing;
053: private boolean both;
054:
055: /**
056: * TrimNode constructor.
057: */
058: public TrimNode() {
059: super ();
060: }
061:
062: /**
063: * INTERNAL
064: * Validate node and calculate its type.
065: */
066: public void validate(ParseTreeContext context) {
067: TypeHelper typeHelper = context.getTypeHelper();
068: if (left != null) {
069: left.validate(context);
070: left.validateParameter(context, typeHelper.getStringType());
071: }
072: if (trimChar != null) {
073: trimChar.validate(context);
074: trimChar.validateParameter(context, typeHelper
075: .getCharType());
076: }
077: setType(typeHelper.getStringType());
078: }
079:
080: /**
081: * INTERNAL
082: * Generate the TopLink expression for this node
083: */
084: public Expression generateExpression(GenerationContext context) {
085: Expression whereClause = getLeft().generateExpression(context);
086: if (leading) {
087: // use leftTrim
088: if (trimChar != null) {
089: Expression trimCharExpr = trimChar
090: .generateExpression(context);
091: whereClause = whereClause.leftTrim(trimCharExpr);
092: } else {
093: whereClause = whereClause.leftTrim();
094: }
095: } else if (trailing) {
096: if (trimChar != null) {
097: Expression trimCharExpr = trimChar
098: .generateExpression(context);
099: whereClause = whereClause.rightTrim(trimCharExpr);
100: } else {
101: whereClause = whereClause.rightTrim();
102: }
103: } else {
104: if (trimChar != null) {
105: Expression trimCharExpr = trimChar
106: .generateExpression(context);
107: whereClause = whereClause.leftTrim(trimCharExpr)
108: .rightTrim(trimCharExpr);
109: } else {
110: whereClause = whereClause.leftTrim().rightTrim();
111: }
112: }
113: return whereClause;
114: }
115:
116: /** */
117: public void setTrimChar(Node trimChar) {
118: this .trimChar = trimChar;
119: }
120:
121: /** */
122: public boolean isLeading() {
123: return leading;
124: }
125:
126: /** */
127: public void setLeading(boolean newLeading) {
128: this .leading = newLeading;
129: }
130:
131: /** */
132: public boolean isTrailing() {
133: return trailing;
134: }
135:
136: /** */
137: public void setTrailing(boolean newTrailing) {
138: this .trailing = newTrailing;
139: }
140:
141: /** */
142: public boolean isBoth() {
143: return both;
144: }
145:
146: /** */
147: public void setBoth(boolean newBoth) {
148: this.both = newBoth;
149: }
150:
151: }
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