com.google.web.bindery.autobean.vm.impl.FactoryHandler Maven / Gradle / Ivy
/*
* Copyright 2010 Google Inc.
*
* 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 com.google.web.bindery.autobean.vm.impl;
import com.google.web.bindery.autobean.shared.AutoBean.PropertyName;
import com.google.web.bindery.autobean.shared.AutoBeanFactory;
import com.google.web.bindery.autobean.shared.AutoBeanUtils;
import com.google.web.bindery.autobean.vm.Configuration;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
/**
* Handles dispatches on AutoBeanFactory interfaces.
*/
public class FactoryHandler implements InvocationHandler {
private final Configuration configuration;
/**
* Constructor.
*
* @param categories the classes specified by a Category annotation
*/
public FactoryHandler(Configuration configuration) {
this.configuration = configuration;
}
/**
* Handles both declared factory methods as well as the dynamic create
* methods.
*/
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
Class beanType;
Object toWrap = null;
String name = method.getName();
if (name.equals("create")) {
// Dynamic create. Guaranteed to have at least one argument
// create(clazz); or create(clazz, toWrap);
beanType = (Class) args[0];
if (args.length == 2) {
toWrap = args[1];
}
} else if (name.equals("getEnum")) {
Class clazz = (Class) args[0];
String token = (String) args[1];
return getEnum(clazz, token);
} else if (name.equals("getToken")) {
Enum e = (Enum) args[0];
return getToken(e);
} else {
// Declared factory method, use the parameterization
// AutoBean foo(); or Autobean foo(Foo toWrap);
ParameterizedType returnType = (ParameterizedType) method.getGenericReturnType();
beanType = (Class) returnType.getActualTypeArguments()[0];
if (args != null && args.length == 1) {
toWrap = args[0];
}
}
// Return any existing wrapper
ProxyAutoBean