/**
* Instruments the given directory, reading each .class file, processing it, and writing it back
* to the filesystem
*
* @param configurer an {@link InstrumenterConfigurer} that will setup the actual {@link
* Instrumenter} that will be used to process the directory
* @param processDirectory the directory with .class files to process
* @param extraPath a string containing a list of additional paths to add to the classpath used on
* instrumentation. This string is system-dependent, using the platform separator and
* directory separator
* @throws Exception
* @see File#pathSeparator
* @see File#separator
*/
public static void runInstrumentation(
@NonNull InstrumenterConfigurer configurer,
@NonNull Directory processDirectory,
@NonNull String extraPath)
throws Exception {
ClassPool classPool = new ClassPool(true);
classPool.appendPathList(extraPath);
classPool.appendClassPath(processDirectory.getAbsolutePath());
InstrumenterImpl instrumenter = new InstrumenterImpl(classPool);
configurer.configureInstrumenter(instrumenter);
instrumenter.ensureConfigured();
new InstrumentationContext(instrumenter, processDirectory, classPool).doInstrument();
}
private void doInstrument() throws Exception {
for (File classfile : processDirectory.getRecurseFileStream().filter(suffix(".class")))
processAndWriteClass(processDirectory, classfile);
}
private void processAndWriteClass(Directory baseDir, File classfile) throws Exception {
CtClass clazz = classPool.get(ClassNames.getClassName(baseDir, classfile));
classInstrumenter.instrumentClass(clazz);
if (clazz.isModified()) clazz.writeFile(processDirectory.getAbsolutePath());
clazz.detach();
}