synchronized boolean includesTransformer(ClassFileTransformer transformer) {
for (TransformerInfo info : mTransformerList) {
if (info.transformer() == transformer) {
return true;
}
}
return false;
}
String[] getNativeMethodPrefixes() {
TransformerInfo[] transformerList = getSnapshotTransformerList();
String[] prefixes = new String[transformerList.length];
for (int x = 0; x < transformerList.length; x++) {
TransformerInfo transformerInfo = transformerList[x];
prefixes[x] = transformerInfo.getPrefix();
}
return prefixes;
}
boolean setNativeMethodPrefix(ClassFileTransformer transformer, String prefix) {
TransformerInfo[] transformerList = getSnapshotTransformerList();
for (int x = 0; x < transformerList.length; x++) {
TransformerInfo transformerInfo = transformerList[x];
ClassFileTransformer aTransformer = transformerInfo.transformer();
if (aTransformer == transformer) {
transformerInfo.setPrefix(prefix);
return true;
}
}
return false;
}
public byte[] transform(
ClassLoader loader,
String classname,
Class<?> classBeingRedefined,
ProtectionDomain protectionDomain,
byte[] classfileBuffer) {
boolean someoneTouchedTheBytecode = false;
TransformerInfo[] transformerList = getSnapshotTransformerList();
byte[] bufferToUse = classfileBuffer;
// order matters, gotta run 'em in the order they were added
for (int x = 0; x < transformerList.length; x++) {
TransformerInfo transformerInfo = transformerList[x];
ClassFileTransformer transformer = transformerInfo.transformer();
byte[] transformedBytes = null;
try {
transformedBytes =
transformer.transform(
loader, classname, classBeingRedefined, protectionDomain, bufferToUse);
} catch (Throwable t) {
// don't let any one transformer mess it up for the others.
// This is where we need to put some logging. What should go here? FIXME
}
if (transformedBytes != null) {
someoneTouchedTheBytecode = true;
bufferToUse = transformedBytes;
}
}
// if someone modified it, return the modified buffer.
// otherwise return null to mean "no transforms occurred"
byte[] result;
if (someoneTouchedTheBytecode) {
result = bufferToUse;
} else {
result = null;
}
return result;
}