org.apache.commons.javaflow.ant.AntRewriteTask Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.javaflow.ant;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.jar.JarInputStream;
import java.util.jar.JarOutputStream;
import org.apache.commons.javaflow.bytecode.transformation.ResourceTransformer;
import org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer;
import org.apache.commons.javaflow.utils.RewritingUtils;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.types.FileSet;
/**
* Ant task that enhances class files with javaflow instrumentation.
*/
public class AntRewriteTask extends MatchingTask {
private ResourceTransformer transformer;
private File dstDir;
private File srcDir;
/**
* Directory to which the transformed files will be written.
* This can be the same as the source directory.
*/
public void setDestdir(final File pFile) {
dstDir = pFile;
}
/**
* Directory from which the input files are read.
* This and the inherited {@link MatchingTask} forms an implicit
* {@link FileSet}.
*/
public void setSrcDir(final File pFile) {
srcDir = pFile;
fileset.setDir(srcDir);
}
/**
* Sets the transformer to use.
*
*
* This option is unpublished, because in a long run we'll
* likely to just focus on one transformer and get rid
* of the other (and this option will be removed then.)
*
* @param name
* "ASM". Case insensitive.
*/
public void setMode(String name) {
if(name.equalsIgnoreCase("asm")) {
transformer = new AsmClassTransformer();
} else {
throw new BuildException("Unrecognized mode: "+name);
}
}
/**
* Check that all required attributes have been set and nothing
* silly has been entered.
*
* @since Ant 1.5
*/
protected void checkParameters() throws BuildException {
checkDir(srcDir,"srcDir");
checkDir(dstDir,"dstDir");
}
private void checkDir(final File pDir, final String pDescription) {
if (pDir == null) {
throw new BuildException("no " + pDescription + " directory is specified", getLocation());
}
if (!pDir.exists()) {
throw new BuildException(pDescription + " directory \"" + pDir + "\" does not exist", getLocation());
}
if (!pDir.isDirectory()) {
throw new BuildException(pDescription + " directory \"" + pDir + "\" is not a directory", getLocation());
}
}
public void execute() throws BuildException {
final DirectoryScanner ds = fileset.getDirectoryScanner(getProject());
final String[] fileNames = ds.getIncludedFiles();
if(transformer == null) {
transformer = new AsmClassTransformer();
}
try {
for (final String fileName : fileNames) {
final File source = new File(srcDir, fileName);
final File destination = new File(dstDir, fileName);
if (!destination.getParentFile().exists()) {
log("Creating dir: " + destination.getParentFile(), Project.MSG_VERBOSE);
destination.getParentFile().mkdirs();
}
if (source.lastModified() < destination.lastModified()) {
log("Omitting " + source + " as " + destination + " is up to date", Project.MSG_VERBOSE);
continue;
}
if (fileName.endsWith(".class")) {
log("Rewriting " + source + " to " + destination, Project.MSG_VERBOSE);
// System.out.println("Rewriting " + source);
RewritingUtils.rewriteClassFile( source, transformer, destination );
}
if (fileName.endsWith(".jar")
|| fileName.endsWith(".ear")
|| fileName.endsWith(".zip")
|| fileName.endsWith(".war")) {
log("Rewriting " + source + " to " + destination, Project.MSG_VERBOSE);
RewritingUtils.rewriteJar(
new JarInputStream(new FileInputStream(source)),
transformer,
new JarOutputStream(new FileOutputStream(destination))
);
}
}
} catch (IOException e) {
throw new BuildException(e);
}
}
}