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/* |
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* The Apache Software License, Version 1.1 |
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* |
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* Copyright (c) 2000 The Apache Software Foundation. All rights |
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* reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, if |
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* any, must include the following acknowlegement: |
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* "This product includes software developed by the |
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* Apache Software Foundation (http://www.apache.org/)." |
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* Alternately, this acknowlegement may appear in the software itself, |
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* if and wherever such third-party acknowlegements normally appear. |
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* |
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* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software |
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* Foundation" must not be used to endorse or promote products derived |
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* from this software without prior written permission. For written |
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* permission, please contact apache@apache.org. |
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* |
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* 5. Products derived from this software may not be called "Apache" |
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* nor may "Apache" appear in their names without prior written |
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* permission of the Apache Group. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Software Foundation. For more |
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* information on the Apache Software Foundation, please see |
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* <http://www.apache.org/>. |
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*/ |
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package org.apache.tools.ant.taskdefs.optional; |
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import java.io.*; |
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import org.apache.tools.ant.*; |
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import org.apache.tools.ant.taskdefs.*; |
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import org.apache.tools.ant.types.*; |
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/** |
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* @author Erik Meade, emeade@geekfarm.org |
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*/ |
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public class ANTLR extends Task { |
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private CommandlineJava commandline = new CommandlineJava(); |
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private File target; |
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private File outputDirectory; |
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private boolean fork = false; |
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private File dir; |
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public ANTLR() { |
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commandline.setVm("java"); |
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commandline.setClassname("antlr.Tool"); |
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} |
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public void setTarget(File target) { |
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log("Setting target to: " + target.toString(), Project.MSG_VERBOSE); |
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this.target = target; |
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} |
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public void setOutputdirectory(File outputDirectory) { |
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log("Setting output directory to: " + outputDirectory.toString(), Project.MSG_VERBOSE); |
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this.outputDirectory = outputDirectory; |
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} |
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public void setFork(boolean s) { |
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this.fork = s; |
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} |
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/** |
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* The working directory of the process |
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*/ |
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public void setDir(File d) { |
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this.dir = d; |
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} |
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public void execute() throws BuildException { |
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validateAttributes(); |
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//TODO: use ANTLR to parse the grammer file to do this. |
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if (target.lastModified() > getGeneratedFile().lastModified()) { |
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commandline.createArgument().setValue("-o"); |
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commandline.createArgument().setValue(outputDirectory.toString()); |
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commandline.createArgument().setValue(target.toString()); |
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if (fork) { |
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log("Forking " + commandline.toString(), Project.MSG_VERBOSE); |
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int err = run(commandline.getCommandline()); |
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if (err == 1) { |
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throw new BuildException("ANTLR returned: "+err, location); |
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} |
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} |
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else { |
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Execute.runCommand(this, commandline.getCommandline()); |
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} |
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} |
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} |
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private void validateAttributes() throws BuildException{ |
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if (target == null || !target.isFile()) { |
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throw new BuildException("Invalid target: " + target); |
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} |
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// if no output directory is specified, used the target's directory |
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if (outputDirectory == null) { |
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String fileName = target.toString(); |
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setOutputdirectory(new File(target.getParent())); |
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} |
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if (!outputDirectory.isDirectory()) { |
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throw new BuildException("Invalid output directory: " + outputDirectory); |
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} |
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if (fork && (dir == null || !dir.isDirectory())) { |
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throw new BuildException("Invalid working directory: " + dir); |
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} |
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} |
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private File getGeneratedFile() throws BuildException { |
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String generatedFileName = null; |
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try { |
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BufferedReader in = new BufferedReader(new FileReader(target)); |
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String line; |
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while ((line = in.readLine()) != null) { |
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int extendsIndex = line.indexOf(" extends "); |
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if (line.startsWith("class ") && extendsIndex > -1) { |
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generatedFileName = line.substring(6, extendsIndex).trim(); |
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break; |
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} |
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} |
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in.close(); |
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} catch (Exception e) { |
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throw new BuildException("Unable to determine generated class"); |
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} |
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if (generatedFileName == null) { |
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throw new BuildException("Unable to determine generated class"); |
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} |
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return new File(outputDirectory, generatedFileName + ".java"); |
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} |
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private int run(String[] command) throws BuildException { |
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Execute exe = new Execute(new LogStreamHandler(this, Project.MSG_INFO, |
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Project.MSG_WARN), null); |
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exe.setAntRun(project); |
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exe.setWorkingDirectory(dir); |
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exe.setCommandline(command); |
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try { |
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return exe.execute(); |
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} catch (IOException e) { |
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throw new BuildException(e, location); |
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} |
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} |
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} |
Stefan Bodewig