/** Invokes a given method via {@link Method#invoke(Object, Object...)}. */
default Object invoke(ResolvedJavaMethod method, Object receiver, Object... args) {
try {
JavaType[] parameterTypes = method.toParameterTypes();
Class<?>[] parameterClasses = new Class<?>[parameterTypes.length];
for (int i = 0; i < parameterClasses.length; ++i) {
JavaType type = parameterTypes[i];
if (type.getJavaKind() != JavaKind.Object) {
parameterClasses[i] = type.getJavaKind().toJavaClass();
} else {
parameterClasses[i] = resolveClassForSnippet(parameterTypes[i]);
}
}
Class<?> c = resolveClassForSnippet(method.getDeclaringClass());
if (method.isConstructor()) {
Constructor<?> javaConstructor = c.getDeclaredConstructor(parameterClasses);
javaConstructor.setAccessible(true);
return javaConstructor.newInstance(args);
} else {
Method javaMethod = c.getDeclaredMethod(method.getName(), parameterClasses);
javaMethod.setAccessible(true);
return javaMethod.invoke(receiver, args);
}
} catch (IllegalAccessException
| InstantiationException
| InvocationTargetException
| ClassNotFoundException
| NoSuchMethodException ex) {
throw new IllegalArgumentException(ex);
}
}
/**
* Gets the method bridged to by a {@linkplain ResolvedJavaMethod#isBridge() bridge} method. The
* value returned is the method called by {@code method} that has the same name as {@code bridge}.
*
* @param bridge a bridge method
* @return the method called by {@code bridge} whose name is the same as {@code bridge.getName()}
*/
public static ResolvedJavaMethod getBridgedMethod(ResolvedJavaMethod bridge) {
assert bridge.isBridge();
Bytecode code = new ResolvedJavaMethodBytecode(bridge);
BytecodeStream stream = new BytecodeStream(code.getCode());
int opcode = stream.currentBC();
ResolvedJavaMethod bridged = null;
while (opcode != Bytecodes.END) {
switch (opcode) {
case INVOKEVIRTUAL:
case INVOKESPECIAL:
case INVOKESTATIC:
case INVOKEINTERFACE:
{
int cpi = stream.readCPI();
ConstantPool cp = code.getConstantPool();
cp.loadReferencedType(cpi, opcode);
ResolvedJavaMethod method = (ResolvedJavaMethod) cp.lookupMethod(cpi, opcode);
if (method.getName().equals(bridge.getName())) {
if (!assertionsEnabled()) {
return method;
}
assert bridged == null || bridged.equals(method)
: String.format(
"Found calls to different methods named %s in bridge method %s%n callee 1: %s%n callee 2: %s",
bridge.getName(),
bridge.format("%R %H.%n(%P)"),
bridged.format("%R %H.%n(%P)"),
method.format("%R %H.%n(%P)"));
bridged = method;
}
break;
}
}
stream.next();
opcode = stream.currentBC();
}
if (bridged == null) {
throw new InternalError("Couldn't find method bridged by " + bridge.format("%R %H.%n(%P)"));
}
return bridged;
}
static ResolvedJavaMethod findMethod(
ResolvedJavaType type, String name, String descriptor, boolean isStatic) {
if (isStatic && name.equals("<clinit>")) {
ResolvedJavaMethod method = type.getClassInitializer();
if (method != null) {
return method;
}
}
ResolvedJavaMethod[] methodsToSearch =
name.equals("<init>") ? type.getDeclaredConstructors() : type.getDeclaredMethods();
for (ResolvedJavaMethod method : methodsToSearch) {
if (method.isStatic() == isStatic
&& method.getName().equals(name)
&& method.getSignature().toMethodDescriptor().equals(descriptor)) {
return method;
}
}
return null;
}
@Override
public Bytecode getBytecode(ResolvedJavaMethod method) {
Classfile classfile = getClassfile(resolveToClass(method.getDeclaringClass().getName()));
return classfile.getCode(method.getName(), method.getSignature().toMethodDescriptor());
}