001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common Development
008: * and Distribution License("CDDL") (collectively, the "License"). You
009: * may not use this file except in compliance with the License. You can obtain
010: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
011: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
012: * language governing permissions and limitations under the License.
013: *
014: * When distributing the software, include this License Header Notice in each
015: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
016: * Sun designates this particular file as subject to the "Classpath" exception
017: * as provided by Sun in the GPL Version 2 section of the License file that
018: * accompanied this code. If applicable, add the following below the License
019: * Header, with the fields enclosed by brackets [] replaced by your own
020: * identifying information: "Portions Copyrighted [year]
021: * [name of copyright owner]"
022: *
023: * Contributor(s):
024: *
025: * If you wish your version of this file to be governed by only the CDDL or
026: * only the GPL Version 2, indicate your decision by adding "[Contributor]
027: * elects to include this software in this distribution under the [CDDL or GPL
028: * Version 2] license." If you don't indicate a single choice of license, a
029: * recipient has the option to distribute your version of this file under
030: * either the CDDL, the GPL Version 2 or to extend the choice of license to
031: * its licensees as provided above. However, if you add GPL Version 2 code
032: * and therefore, elected the GPL Version 2 license, then the option applies
033: * only if the new code is made subject to such option by the copyright
034: * holder.
035: */
036: package com.sun.tools.xjc.generator.util;
037:
038: import com.sun.codemodel.JCodeModel;
039: import com.sun.codemodel.JExpr;
040: import com.sun.codemodel.JExpression;
041: import com.sun.codemodel.JStringLiteral;
042: import com.sun.xml.bind.WhiteSpaceProcessor;
043:
044: /**
045: * Generates code that performs the whitespace normalization.
046: */
047: public abstract class WhitespaceNormalizer {
048: /**
049: * Generates the expression that normalizes
050: * the given expression (which evaluates to java.lang.String).
051: *
052: * @param codeModel
053: * The owner code model object under which a new expression
054: * will be created.
055: */
056: public abstract JExpression generate(JCodeModel codeModel,
057: JExpression literal);
058:
059: /**
060: * Parses "preserve","replace" or "collapse" into
061: * the corresponding WhitespaceNormalizer object.
062: *
063: * @param method
064: * Either "preserve", "replace", or "collapse"
065: *
066: * @exception IllegalArgumentException
067: * when the specified method is invalid.
068: */
069: public static WhitespaceNormalizer parse(String method) {
070: if (method.equals("preserve"))
071: return PRESERVE;
072:
073: if (method.equals("replace"))
074: return REPLACE;
075:
076: if (method.equals("collapse"))
077: return COLLAPSE;
078:
079: throw new IllegalArgumentException(method);
080: }
081:
082: public static final WhitespaceNormalizer PRESERVE = new WhitespaceNormalizer() {
083: public JExpression generate(JCodeModel codeModel,
084: JExpression literal) {
085: return literal;
086: }
087: };
088:
089: public static final WhitespaceNormalizer REPLACE = new WhitespaceNormalizer() {
090: public JExpression generate(JCodeModel codeModel,
091: JExpression literal) {
092: // WhitespaceProcessor.replace(<literal>);
093: if (literal instanceof JStringLiteral)
094: // optimize
095: return JExpr.lit(WhiteSpaceProcessor
096: .replace(((JStringLiteral) literal).str));
097: else
098: return codeModel.ref(WhiteSpaceProcessor.class)
099: .staticInvoke("replace").arg(literal);
100: }
101: };
102:
103: public static final WhitespaceNormalizer COLLAPSE = new WhitespaceNormalizer() {
104: public JExpression generate(JCodeModel codeModel,
105: JExpression literal) {
106: // WhitespaceProcessor.replace(<literal>);
107: if (literal instanceof JStringLiteral)
108: // optimize
109: return JExpr.lit(WhiteSpaceProcessor
110: .collapse(((JStringLiteral) literal).str));
111: else
112: return codeModel.ref(WhiteSpaceProcessor.class)
113: .staticInvoke("collapse").arg(literal);
114: }
115: };
116: }
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