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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
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* The contents of this file are subject to the terms of either the GNU
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* General Public License Version 2 only ("GPL") or the Common
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* Development and Distribution License("CDDL") (collectively, the
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* "License"). You may not use this file except in compliance with the
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* License. You can obtain a copy of the License at
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* http://www.netbeans.org/cddl-gplv2.html
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* or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
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* specific language governing permissions and limitations under the
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* License. When distributing the software, include this License Header
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* Notice in each file and include the License file at
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* nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the GPL Version 2 section of the License file that
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* accompanied this code. If applicable, add the following below the
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* License Header, with the fields enclosed by brackets [] replaced by
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* your own identifying information:
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* "Portions Copyrighted [year] [name of copyright owner]"
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* The Original Software is NetBeans. The Initial Developer of the Original
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* Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
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* However, if you add GPL Version 2 code and therefore, elected the GPL
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* made subject to such option by the copyright holder.
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package org.netbeans.lexer.gen;
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import java.io.FileWriter;
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import java.io.IOException;
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import org.apache.tools.ant.BuildException;
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import org.apache.tools.ant.Task;
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* Abstract class for supporting a language description xml file generation.
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* @author Miloslav Metelka
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public abstract class GenerateLanguageDescription extends Task {
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private String tokenTypesClassName;
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private File languageDescriptionFile;
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public GenerateLanguageDescription() {
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public String getTokenTypesClassName() {
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return tokenTypesClassName;
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public void setTokenTypesClassName(String tokenTypesClassName) {
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this.tokenTypesClassName = tokenTypesClassName;
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public File getLanguageDescriptionFile() {
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return languageDescriptionFile;
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public void setLanguageDescriptionFile(File languageDescriptionFile) {
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this.languageDescriptionFile = languageDescriptionFile;
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public void execute() throws BuildException {
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String tokenTypesClassName = getTokenTypesClassName();
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File langDescFile = getLanguageDescriptionFile();
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if (tokenTypesClassName == null || "".equals(tokenTypesClassName)) {
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throw new BuildException("tokenTypesClassName attribute must be set");
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if (langDescFile == null) {
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throw new BuildException("languageDescriptionFile attribute must be set");
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output = generate(tokenTypesClassName);
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} catch (ClassNotFoundException e) {
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throw new BuildException(e);
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String writeType = langDescFile.exists()
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? "appended to the end of"
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// getAbsolutePath() used to be able to compile on JDK1.3
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FileWriter langDescWriter = new FileWriter(langDescFile.getAbsolutePath(), true); // append
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langDescWriter.write(output);
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langDescWriter.close();
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log("Language description about class "
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+ tokenTypesClassName + " successfully "
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+ writeType + " file "
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} catch (IOException e) {
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throw new BuildException("IOException occurred", e);
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protected abstract String generate(String tokenTypesClassName) throws ClassNotFoundException;