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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) 2001 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", "Ant", 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; |
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import java.io.File; |
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import java.io.FilenameFilter; |
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import java.util.StringTokenizer; |
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import java.util.Properties; |
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import java.net.URL; |
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import java.net.MalformedURLException; |
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import java.lang.reflect.Method; |
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/** |
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* This is the Ant command line front end to end. This front end |
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* works out where ant is installed and loads the ant libraries before |
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* starting Ant proper. |
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* |
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* @author <a href="mailto:conor@apache.org">Conor MacNeill</a> |
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*/ |
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public class Launcher { |
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private static File determineAntHome11() { |
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String classpath = System.getProperty("java.class.path"); |
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StringTokenizer tokenizer = new StringTokenizer(classpath, System.getProperty("path.separator")); |
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while (tokenizer.hasMoreTokens()) { |
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String path = tokenizer.nextToken(); |
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if (path.endsWith("ant.jar")) { |
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File antJarFile = new File(path); |
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File libDirectory = new File(antJarFile.getParent()); |
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File antHome = new File(libDirectory.getParent()); |
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return antHome; |
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} |
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} |
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return null; |
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} |
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private static File determineAntHome(ClassLoader systemClassLoader) { |
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try { |
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String className = Launcher.class.getName().replace('.', '/') + ".class"; |
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URL classResource = systemClassLoader.getResource(className); |
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String fileComponent = classResource.getFile(); |
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if (classResource.getProtocol().equals("file")) { |
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// Class comes from a directory of class files rather than |
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// from a jar. |
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int classFileIndex = fileComponent.lastIndexOf(className); |
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if (classFileIndex != -1) { |
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fileComponent = fileComponent.substring(0, classFileIndex); |
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} |
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File classFilesDir = new File(fileComponent); |
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File buildDir = new File(classFilesDir.getParent()); |
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File devAntHome = new File(buildDir.getParent()); |
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return devAntHome; |
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} |
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else if (classResource.getProtocol().equals("jar")) { |
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// Class is coming from a jar. The file component of the URL |
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// is actually the URL of the jar file |
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int classSeparatorIndex = fileComponent.lastIndexOf("!"); |
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if (classSeparatorIndex != -1) { |
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fileComponent = fileComponent.substring(0, classSeparatorIndex); |
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} |
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URL antJarURL = new URL(fileComponent); |
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File antJarFile = new File(antJarURL.getFile()); |
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File libDirectory = new File(antJarFile.getParent()); |
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File antHome = new File(libDirectory.getParent()); |
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return antHome; |
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} |
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} |
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catch (MalformedURLException e) { |
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e.printStackTrace(); |
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} |
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return null; |
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} |
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private static void addDirJars(AntClassLoader classLoader, File jarDir) { |
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String[] fileList = jarDir.list(new FilenameFilter() { |
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public boolean accept(File dir, String name) { |
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return name.endsWith(".jar"); |
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} |
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}); |
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if (fileList != null) { |
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for (int i = 0; i < fileList.length; ++i) { |
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File jarFile = new File(jarDir, fileList[i]); |
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classLoader.addPathElement(jarFile.getAbsolutePath()); |
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} |
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} |
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} |
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private static void addToolsJar(AntClassLoader antLoader) { |
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String javaHome = System.getProperty("java.home"); |
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if (javaHome.endsWith("jre")) { |
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javaHome = javaHome.substring(0, javaHome.length() - 4); |
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} |
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System.out.println("Java home is " + javaHome); |
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File toolsJar = new File(javaHome, "lib/tools.jar"); |
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if (!toolsJar.exists()) { |
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System.out.println("Unable to find tools.jar at " + toolsJar.getPath()); |
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} |
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else { |
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antLoader.addPathElement(toolsJar.getAbsolutePath()); |
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} |
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} |
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public static void main(String[] args) { |
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File antHome = null; |
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ClassLoader systemClassLoader = Launcher.class.getClassLoader(); |
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if (systemClassLoader == null) { |
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antHome = determineAntHome11(); |
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} |
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else { |
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antHome = determineAntHome(systemClassLoader); |
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} |
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if (antHome == null) { |
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System.err.println("Unable to determine ANT_HOME"); |
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System.exit(1); |
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} |
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System.out.println("ANT_HOME is " + antHome); |
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// We now create the class loader with which we are going to launch ant |
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AntClassLoader antLoader = new AntClassLoader(systemClassLoader, false); |
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// need to find tools.jar |
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addToolsJar(antLoader); |
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// add everything in the lib directory to this classloader |
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File libDir = new File(antHome, "lib"); |
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addDirJars(antLoader, libDir); |
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File optionalDir = new File(antHome, "lib/optional"); |
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addDirJars(antLoader, optionalDir); |
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Properties launchProperties = new Properties(); |
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launchProperties.put("ant.home", antHome.getAbsolutePath()); |
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try { |
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Class mainClass = antLoader.loadClass("org.apache.tools.ant.Main"); |
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antLoader.initializeClass(mainClass); |
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final Class[] param = {Class.forName("[Ljava.lang.String;"), |
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Properties.class, ClassLoader.class}; |
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final Method startMethod = mainClass.getMethod("start", param); |
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final Object[] argument = {args, launchProperties, systemClassLoader}; |
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startMethod.invoke(null, argument); |
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} |
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catch (Exception e) { |
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System.out.println("Exception running Ant: " + e.getClass().getName() + ": " + e.getMessage()); |
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e.printStackTrace(); |
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} |
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} |
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} |
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Stefan Bodewig