| /* |
| * Copyright 2000-2010 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.intellij.openapi.components; |
| |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.NotNullLazyKey; |
| import com.intellij.util.NotNullFunction; |
| import org.jetbrains.annotations.NotNull; |
| |
| |
| /** |
| * For old-style components, the contract specifies a lifecycle: the component gets created and notified during the project opening process. |
| * For services, there's no such contract, so we don't even load the class implementing the service until someone requests it. |
| */ |
| @SuppressWarnings({"unchecked"}) |
| public class ServiceManager { |
| private ServiceManager() { |
| } |
| |
| public static <T> T getService(@NotNull Class<T> serviceClass) { |
| return (T)ApplicationManager.getApplication().getPicoContainer().getComponentInstance(serviceClass.getName()); |
| } |
| |
| public static <T> T getService(@NotNull Project project, @NotNull Class<T> serviceClass) { |
| return (T)project.getPicoContainer().getComponentInstance(serviceClass.getName()); |
| } |
| |
| /** |
| * Creates lazy caching key to store project-level service instance from {@link #getService(com.intellij.openapi.project.Project, Class)}. |
| * |
| * @param serviceClass Service class to create key for. |
| * @param <T> Service class type. |
| * @return Key instance. |
| */ |
| public static <T> NotNullLazyKey<T, Project> createLazyKey(@NotNull final Class<T> serviceClass) { |
| return NotNullLazyKey.create("Service: " + serviceClass.getName(), new NotNullFunction<Project, T>() { |
| @Override |
| @NotNull |
| public T fun(Project project) { |
| return getService(project, serviceClass); |
| } |
| }); |
| } |
| } |