/*
* Copyright 2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.powermock.api.support;
import org.powermock.core.MockRepository;
import org.powermock.reflect.Whitebox;
import org.powermock.reflect.exceptions.MethodNotFoundException;
import org.powermock.reflect.exceptions.TooManyMethodsFoundException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
public class MethodProxy {
/**
* Add a proxy for this method. Each call to the method will be routed to
* the invocationHandler instead.
*/
public static void proxy(Method method, InvocationHandler invocationHandler) {
assertInvocationHandlerNotNull(invocationHandler);
MockRepository.putMethodProxy(method, invocationHandler);
}
/**
* Add a proxy for a method declared in class <code>declaringClass</code>.
* Each call to the method will be routed to the invocationHandler instead.
*/
public static void proxy(Class<?> declaringClass, String methodName, InvocationHandler invocationHandler) {
assertInvocationHandlerNotNull(invocationHandler);
if (declaringClass == null) {
throw new IllegalArgumentException("declaringClass cannot be null");
}
if (methodName == null || methodName.length() == 0) {
throw new IllegalArgumentException("methodName cannot be empty");
}
Method[] methods = Whitebox.getMethods(declaringClass, methodName);
if (methods.length == 0) {
throw new MethodNotFoundException(String.format("Couldn't find a method with name %s in the class hierarchy of %s", methodName,
declaringClass.getName()));
} else if (methods.length > 1) {
throw new TooManyMethodsFoundException(String.format("Found %d methods with name %s in the class hierarchy of %s.", methods.length,
methodName, declaringClass.getName()));
}
MockRepository.putMethodProxy(methods[0], invocationHandler);
}
private static void assertInvocationHandlerNotNull(InvocationHandler invocationHandler) {
if (invocationHandler == null) {
throw new IllegalArgumentException("invocationHandler cannot be null");
}
}
}