void processMethods() throws IOException {
int methodsCount = is.readUnsignedShort();
os.writeShort(methodsCount);
for (int i = 0; i < methodsCount; i++) {
MethodInfo methodInfo = readMethod();
if (methodInfo.getInterceptorClass() != null) {
injectCode(methodInfo);
}
methods.add(methodInfo);
}
writeMethods();
}
private void writeMethods() throws IOException {
for (MethodInfo method : methods) {
os.writeShort(method.getAccessFlags());
os.writeShort(method.getNameIndex());
os.writeShort(method.getDescriptorIndex());
os.writeShort(method.getAttributes().length);
attributeFacility.writeAttributes(method.getAttributes());
}
}
private void injectCode(MethodInfo methodInfo) throws IOException {
if (methodInfo.getCode() == null) {
return;
}
InterceptorConstants interceptorConstants =
getOrInsertInterceptorConstants(methodInfo.getInterceptorClass());
fixupSignature(methodInfo.getSignature());
Map<String, Integer> wrapperMethods =
getOrInsertPrimitiveWrapperMethods(methodInfo.getSignature());
ByteArrayOutputStream codeToInject = new ByteArrayOutputStream();
InstructionsFacility instructionsFacility =
new InstructionsFacility(
new DataOutputStream(codeToInject),
methodInfo.getSignature(),
interceptorConstants,
wrapperMethods);
instructionsFacility.generateInterceptorInstantiationCode();
instructionsFacility.generateInterceptorMethodParametersCode(getObjectClassIndex());
instructionsFacility.generateObjectArrayFillingCode();
instructionsFacility.generateInterceptorInvocationCode(
interceptorConstants.getInterceptorMethod());
Code code = methodInfo.getCode();
int originalStackSize = code.getMaxStack();
code.setMaxStack(Math.max(originalStackSize, instructionsFacility.getStackSizeNeeded()));
code.setInjected(codeToInject.toByteArray());
code.refresh();
}
private MethodInfo readMethod() throws IOException {
MethodInfo methodInfo = new MethodInfo();
methodInfo.setAccessFlags(is.readUnsignedShort());
methodInfo.setNameIndex(is.readUnsignedShort());
methodInfo.setDescriptorIndex(is.readUnsignedShort());
int attributesCount = is.readUnsignedShort();
methodInfo.setAttributes(new AbstractAttribute[attributesCount]);
for (int i = 0; i < attributesCount; i++) {
AbstractAttribute attribute = attributeFacility.readAttribute();
if (isInterceptorAnnotation(attribute)) {
methodInfo.setInterceptorClass(
((RuntimeInvisibleAnnotations) attribute).getInterceptorClass());
}
methodInfo.getAttributes()[i] = attribute;
if (attribute.getClass() == Code.class) {
methodInfo.setCode((Code) attribute);
}
}
methodInfo.setSignature(getMethodSignature(methodInfo));
methodInfo.setMethodName(constantPool.getUtf8(methodInfo.getNameIndex()).getString());
return methodInfo;
}