author | jwilhelm |
Tue, 29 Aug 2017 17:17:58 +0200 | |
changeset 47000 | bf9c7464f8c5 |
parent 40614 | b5d80754b40e |
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/* |
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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import java.io.ByteArrayInputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileOutputStream; |
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import java.io.FileNotFoundException; |
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import java.io.InputStream; |
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import java.io.ByteArrayInputStream; |
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import java.nio.file.Files; |
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import java.nio.file.Path; |
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import java.nio.file.Paths; |
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import java.nio.file.StandardCopyOption; |
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import java.util.zip.ZipEntry; |
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import java.util.zip.ZipOutputStream; |
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|
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/** |
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* Dump a class file for a class on the class path in the current directory, or |
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* in the specified JAR file. This class is usually used when you build a class |
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* from a test library, but want to use this class in a sub-process. |
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* |
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* For example, to build the following library class: |
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* test/lib/sun/hotspot/WhiteBox.java |
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* |
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* You would use the following tags: |
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* |
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* @library /test/lib |
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* @build sun.hotspot.WhiteBox |
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* |
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* JTREG would build the class file under |
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* ${JTWork}/classes/test/lib/sun/hotspot/WhiteBox.class |
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* |
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* With you run your main test class using "@run main MyMainClass", JTREG would setup the |
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* -classpath to include "${JTWork}/classes/test/lib/", so MyMainClass would be able to |
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* load the WhiteBox class. |
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* |
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* However, if you run a sub process, and do not wish to use the exact same -classpath, |
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* You can use ClassFileInstaller to ensure that WhiteBox is available in the current |
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* directory of your test: |
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* |
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* @run main ClassFileInstaller sun.hotspot.WhiteBox |
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* |
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* Or, you can use the -jar option to store the class in the specified JAR file. If a relative |
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* path name is given, the JAR file would be relative to the current directory of |
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* |
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* @run main ClassFileInstaller -jar myjar.jar sun.hotspot.WhiteBox |
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*/ |
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public class ClassFileInstaller { |
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/** |
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* You can enable debug tracing of ClassFileInstaller by running JTREG with |
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* jtreg -DClassFileInstaller.debug=true ... <names of tests> |
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*/ |
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public static boolean DEBUG = Boolean.getBoolean("ClassFileInstaller.debug"); |
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/** |
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* @param args The names of the classes to dump |
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* @throws Exception |
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*/ |
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public static void main(String... args) throws Exception { |
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if (args.length > 1 && args[0].equals("-jar")) { |
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if (args.length < 2) { |
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throw new RuntimeException("Usage: ClassFileInstaller <options> <classes>\n" + |
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"where possible options include:\n" + |
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" -jar <path> Write to the JAR file <path>"); |
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} |
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writeJar(args[1], null, args, 2, args.length); |
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} else { |
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if (DEBUG) { |
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System.out.println("ClassFileInstaller: Writing to " + System.getProperty("user.dir")); |
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} |
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for (String arg : args) { |
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writeClassToDisk(arg); |
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} |
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} |
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} |
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|
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public static class Manifest { |
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private InputStream in; |
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private Manifest(InputStream in) { |
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this.in = in; |
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} |
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|
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static Manifest fromSourceFile(String fileName) throws Exception { |
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String pathName = System.getProperty("test.src") + File.separator + fileName; |
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return new Manifest(new FileInputStream(pathName)); |
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} |
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|
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// Example: |
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// String manifest = "Premain-Class: RedefineClassHelper\n" + |
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// "Can-Redefine-Classes: true\n"; |
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// ClassFileInstaller.writeJar("redefineagent.jar", |
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// ClassFileInstaller.Manifest.fromString(manifest), |
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// "RedefineClassHelper"); |
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static Manifest fromString(String manifest) throws Exception { |
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return new Manifest(new ByteArrayInputStream(manifest.getBytes())); |
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} |
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public InputStream getInputStream() { |
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return in; |
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} |
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} |
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|
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private static void writeJar(String jarFile, Manifest manifest, String classes[], int from, int to) throws Exception { |
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if (DEBUG) { |
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System.out.println("ClassFileInstaller: Writing to " + getJarPath(jarFile)); |
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} |
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|
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(new File(jarFile)).delete(); |
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FileOutputStream fos = new FileOutputStream(jarFile); |
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ZipOutputStream zos = new ZipOutputStream(fos); |
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|
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// The manifest must be the first or second entry. See comments in JarInputStream |
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// constructor and JDK-5046178. |
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if (manifest != null) { |
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writeToDisk(zos, "META-INF/MANIFEST.MF", manifest.getInputStream()); |
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} |
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139 |
|
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for (int i=from; i<to; i++) { |
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writeClassToDisk(zos, classes[i]); |
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} |
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|
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zos.close(); |
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fos.close(); |
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} |
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|
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/* |
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* You can call ClassFileInstaller.writeJar() from your main test class instead of |
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* using "@run ClassFileInstaller -jar ...". E.g., |
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* |
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* String jarPath = ClassFileInstaller.getJarPath("myjar.jar", "sun.hotspot.WhiteBox") |
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* |
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* If you call this API, make sure you build ClassFileInstaller with the following tags: |
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* |
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* @library testlibrary |
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* @build ClassFileInstaller |
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*/ |
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public static String writeJar(String jarFile, String... classes) throws Exception { |
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writeJar(jarFile, null, classes, 0, classes.length); |
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return getJarPath(jarFile); |
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} |
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|
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public static String writeJar(String jarFile, Manifest manifest, String... classes) throws Exception { |
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writeJar(jarFile, manifest, classes, 0, classes.length); |
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return getJarPath(jarFile); |
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} |
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168 |
|
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/** |
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* This returns the absolute path to the file specified in "@ClassFileInstaller -jar myjar.jar", |
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* In your test program, instead of using the JAR file name directly: |
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* |
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* String jarPath = "myjar.jar"; |
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* |
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* you should call this function, like: |
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* |
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* String jarPath = ClassFileInstaller.getJarPath("myjar.jar") |
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* |
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|
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* The reasons are: |
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|
180 |
* (1) Using absolute path makes it easy to cut-and-paste from the JTR file and rerun your |
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|
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* test in any directory. |
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|
182 |
* (2) In the future, we may make the JAR file name unique to avoid clobbering |
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* during parallel JTREG execution. |
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* |
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*/ |
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public static String getJarPath(String jarFileName) { |
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return new File(jarFileName).getAbsolutePath(); |
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188 |
} |
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189 |
|
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public static void writeClassToDisk(String className) throws Exception { |
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writeClassToDisk((ZipOutputStream)null, className); |
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|
192 |
} |
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private static void writeClassToDisk(ZipOutputStream zos, String className) throws Exception { |
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writeClassToDisk(zos, className, ""); |
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195 |
} |
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196 |
|
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public static void writeClassToDisk(String className, String prependPath) throws Exception { |
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writeClassToDisk(null, className, prependPath); |
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|
199 |
} |
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private static void writeClassToDisk(ZipOutputStream zos, String className, String prependPath) throws Exception { |
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ClassLoader cl = ClassFileInstaller.class.getClassLoader(); |
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|
202 |
|
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// Convert dotted class name to a path to a class file |
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String pathName = className.replace('.', '/').concat(".class"); |
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InputStream is = cl.getResourceAsStream(pathName); |
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if (is == null) { |
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throw new RuntimeException("Failed to find " + pathName); |
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} |
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if (prependPath.length() > 0) { |
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pathName = prependPath + "/" + pathName; |
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211 |
} |
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writeToDisk(zos, pathName, is); |
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213 |
} |
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214 |
|
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public static void writeClassToDisk(String className, byte[] bytecode) throws Exception { |
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writeClassToDisk(null, className, bytecode); |
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} |
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private static void writeClassToDisk(ZipOutputStream zos, String className, byte[] bytecode) throws Exception { |
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writeClassToDisk(zos, className, bytecode, ""); |
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220 |
} |
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221 |
|
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public static void writeClassToDisk(String className, byte[] bytecode, String prependPath) throws Exception { |
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writeClassToDisk(null, className, bytecode, prependPath); |
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224 |
} |
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225 |
private static void writeClassToDisk(ZipOutputStream zos, String className, byte[] bytecode, String prependPath) throws Exception { |
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226 |
// Convert dotted class name to a path to a class file |
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String pathName = className.replace('.', '/').concat(".class"); |
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if (prependPath.length() > 0) { |
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pathName = prependPath + "/" + pathName; |
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} |
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writeToDisk(zos, pathName, new ByteArrayInputStream(bytecode)); |
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} |
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233 |
|
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private static void writeToDisk(ZipOutputStream zos, String pathName, InputStream is) throws Exception { |
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if (DEBUG) { |
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System.out.println("ClassFileInstaller: Writing " + pathName); |
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} |
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if (zos != null) { |
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239 |
ZipEntry ze = new ZipEntry(pathName); |
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zos.putNextEntry(ze); |
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byte[] buf = new byte[1024]; |
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int len; |
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while ((len = is.read(buf))>0){ |
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zos.write(buf, 0, len); |
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} |
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} else { |
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// Create the class file's package directory |
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Path p = Paths.get(pathName); |
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if (pathName.contains("/")) { |
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Files.createDirectories(p.getParent()); |
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} |
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// Create the class file |
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Files.copy(is, p, StandardCopyOption.REPLACE_EXISTING); |
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} |
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is.close(); |
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} |
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} |