com.jetbrains.python.vp.ViewPresenterUtils Maven / Gradle / Ivy
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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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.jetbrains.python.vp;
import com.google.common.base.Preconditions;
import org.jetbrains.annotations.NotNull;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
/**
* Entry point to package. Use {@link #linkViewWithPresenterAndLaunch(Class, Class, Creator)}
* @author Ilya.Kazakevich
*/
public final class ViewPresenterUtils {
private ViewPresenterUtils() {
}
/**
* TODO: Write about do not call anything in constructor
* Creates link between view and presenter and launches them using {@link Presenter#launch()}. Be sure to read package info first.
*
* @param presenterInterface presenter interface
* @param viewInterface view interface
* @param creator class that handles presenter and view instances actual creation
* @param view interface
* @param presenter interface
*/
public static void linkViewWithPresenterAndLaunch(@NotNull Class presenterInterface,
@NotNull Class viewInterface,
@NotNull Creator creator) {
Preconditions.checkArgument(presenterInterface.isInterface(), "Presenter is not interface");
Preconditions.checkArgument(viewInterface.isInterface(), "View is not interface");
//TODO: Use cglib?
PresenterHandler presenterHandler = new PresenterHandler
();
ViewHandler viewHandler = new ViewHandler();
V viewProxy = createProxy(viewInterface, viewHandler);
P presenterProxy = createProxy(presenterInterface, presenterHandler);
V realView = creator.createView(presenterProxy);
viewHandler.setRealView(realView);
P realPresenter = creator.createPresenter(viewProxy);
presenterHandler.setRealPresenter(realPresenter);
realPresenter.launch();
}
@SuppressWarnings("unchecked") //Proxy always returns correct class
private static C createProxy(Class clazz, InvocationHandler handler) {
assert clazz != null;
assert handler != null;
return (C)Proxy.newProxyInstance(ViewPresenterUtils.class.getClassLoader(), new Class[]{clazz}, handler);
}
}