@Override
public void handleChanges(Collection<WatchServiceFileSystemWatcher.FileChangeEvent> changes) {
try {
List<AddedClass> addedClasses = new ArrayList<>();
List<ClassDefinition> changedClasses = new ArrayList<>();
for (WatchServiceFileSystemWatcher.FileChangeEvent change : changes) {
if (change.getType() == WatchServiceFileSystemWatcher.FileChangeEvent.Type.ADDED) {
try (FileInputStream in = new FileInputStream(change.getFile())) {
byte[] bytes = FileReader.readFileBytes(in);
ClassFile file = new ClassFile(new DataInputStream(new ByteArrayInputStream(bytes)));
addedClasses.add(new AddedClass(file.getName(), bytes, classLoader));
}
} else if (change.getType()
== WatchServiceFileSystemWatcher.FileChangeEvent.Type.MODIFIED) {
String hash = hashes.get(change.getFile().getCanonicalPath());
if (hash == null) {
// class is not loaded yet
continue;
}
try (FileInputStream in = new FileInputStream(change.getFile())) {
byte[] bytes = FileReader.readFileBytes(in);
if (!hash.equals(MD5.md5(bytes))) {
ClassFile file =
new ClassFile(new DataInputStream(new ByteArrayInputStream(bytes)));
changedClasses.add(
new ClassDefinition(classLoader.loadClass(file.getName()), bytes));
}
}
}
}
Agent.redefine(
changedClasses.toArray(new ClassDefinition[changedClasses.size()]),
addedClasses.toArray(new AddedClass[addedClasses.size()]));
} catch (Exception e) {
e.printStackTrace();
}
}
public static byte[] getIntegrationClass(ClassLoader c, String name) {
if (!integrationClassloader.containsKey(c)) {
return null;
}
URL resource =
ClassLoader.getSystemClassLoader().getResource(name.replace('.', '/') + ".class");
InputStream in = null;
try {
in = resource.openStream();
return org.fakereplace.util.FileReader.readFileBytes(resource.openStream());
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException e) {
}
}
}
public synchronized void addClassFile(String className, ClassLoader classLoader) {
if (classLoader == null) {
return;
}
URL resource = classLoader.getResource(className.replace(".", "/") + ".class");
if (resource == null) {
return;
}
File file = new File(resource.getFile());
if (!file.exists()) {
return;
}
int parentCount = 1;
for (int i = 0; i < className.length(); ++i) {
if (className.charAt(i) == '.' || className.charAt(i) == '/') {
parentCount++;
}
}
try (InputStream in = resource.openStream()) {
hashes.put(file.getCanonicalPath(), MD5.md5(FileReader.readFileBytes(in)));
} catch (IOException e) {
e.printStackTrace();
return;
}
for (int i = 0; i < parentCount; ++i) {
file = file.getParentFile();
}
if (registered.contains(file)) {
return;
}
registered.add(file);
Callback callback = callbacks.get(classLoader);
if (callback == null) {
callbacks.put(classLoader, callback = new Callback(classLoader));
}
watcher.watchPath(file, callback);
}
@Override
public Iterable<JavaFileObject> list(
Location location, String packageName, Set<Kind> kinds, boolean recurse)
throws IOException {
if (location == StandardLocation.PLATFORM_CLASS_PATH) {
return standardJavaFileManager.list(location, packageName, kinds, recurse);
}
List<JavaFileObject> ret = new ArrayList<>();
if (kinds.contains(Kind.CLASS) && location.equals(StandardLocation.CLASS_PATH)) {
if (classLoader instanceof ModuleClassLoader) {
ModuleClassLoader mcl = (ModuleClassLoader) classLoader;
final String packageWithSlashes = packageName.replace(".", "/");
try {
Iterator<Resource> resources =
mcl.getModule()
.iterateResources(
new PathFilter() {
@Override
public boolean accept(String path) {
if (recurse) {
return path.startsWith(packageWithSlashes);
} else {
return path.equals(packageWithSlashes);
}
}
});
while (resources.hasNext()) {
Resource res = resources.next();
if (!res.getName().endsWith(".class")) {
continue;
}
String binaryName =
res.getName().replace("/", ".").substring(0, res.getName().length() - 6);
try {
ret.add(
new ZipJavaFileObject(
org.fakereplace.util.FileReader.readFileBytes(res.openStream()),
binaryName,
res.getURL().toURI()));
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
} catch (ModuleLoadException e) {
e.printStackTrace();
}
} else {
URL res = classLoader.getResource(packageName.replace(".", "/"));
if (res != null) {
if (res.getProtocol().equals("file")) {
Path dirPath = Paths.get(res.getFile());
listDir(packageName, dirPath, recurse, ret);
} else if (res.getProtocol().equals("jar")) {
JarURLConnection connection = (JarURLConnection) res.openConnection();
Enumeration<JarEntry> entryEnum = connection.getJarFile().entries();
while (entryEnum.hasMoreElements()) {
JarEntry entry = entryEnum.nextElement();
String name = entry.getName();
if (name.endsWith(".class") && !entry.isDirectory()) {
if (name.startsWith(packageName.replace(".", "/"))) {
String rem = name.substring(packageName.length());
if (rem.startsWith("/")) {
rem = rem.substring(1);
}
if (!recurse) {
if (rem.contains("/")) {
continue;
}
}
String binaryName =
entry
.getName()
.replace("/", ".")
.substring(0, entry.getName().length() - 6);
try {
URI uri = new URI(res.toExternalForm() + "/" + rem);
ret.add(
new ZipJavaFileObject(
org.fakereplace.util.FileReader.readFileBytes(
uri.toURL().openStream()),
binaryName,
uri));
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
} else {
System.err.println(
"Could not find package "
+ packageName
+ " in "
+ classLoader
+ " unknown protocol "
+ res.getProtocol());
}
} else {
return standardJavaFileManager.list(location, packageName, kinds, recurse);
}
}
} else {
return standardJavaFileManager.list(location, packageName, kinds, recurse);
}
return ret;
}