| /* |
| * Copyright 2000-2013 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 com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.application.ModalityState; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| /** |
| * Wrapper for view. |
| * @author Ilya.Kazakevich |
| * @param <C> view class |
| */ |
| class ViewHandler<C> implements InvocationHandler { |
| /** |
| * Real view, created by user using {@link com.jetbrains.python.vp.Creator#createView(Presenter)} |
| */ |
| private C realView; |
| |
| public void setRealView(@NotNull C realView) { |
| this.realView = realView; |
| } |
| |
| @Override |
| public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
| Preconditions.checkState(realView != null, "Real view not set"); |
| Invoker invoker = new Invoker(realView, method, args); |
| ApplicationManager.getApplication().invokeAndWait(invoker, ModalityState.defaultModalityState()); |
| if (invoker.exception != null) { |
| throw invoker.exception; |
| } |
| return invoker.result; |
| } |
| |
| /** |
| * Class that invokes view methods in appropriate thread |
| */ |
| private static class Invoker implements Runnable { |
| @NotNull |
| private final Method method; |
| @Nullable |
| private final Object[] args; |
| @NotNull |
| private final Object target; |
| |
| private InvocationTargetException exception; |
| private Object result; |
| |
| private Invoker(@NotNull Object target, @NotNull Method method, @Nullable Object[] args) { |
| this.target = target; |
| this.method = method; |
| this.args = args; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| result = method.invoke(target, args); |
| } |
| catch (IllegalAccessException e) { |
| throw new IllegalStateException("Method is unaccessible: " + method, e); |
| } |
| catch (InvocationTargetException e) { |
| exception = e; |
| } |
| } |
| } |
| } |