1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 15 package com.android.systemui.plugins; 16 17 import android.util.ArrayMap; 18 19 import com.android.systemui.Dependency; 20 import com.android.systemui.plugins.PluginDependency.DependencyProvider; 21 22 public class PluginDependencyProvider extends DependencyProvider { 23 24 private final ArrayMap<Class<?>, Object> mDependencies = new ArrayMap<>(); 25 private final PluginManager mManager; 26 27 public PluginDependencyProvider(PluginManager manager) { 28 mManager = manager; 29 PluginDependency.sProvider = this; 30 } 31 32 public <T> void allowPluginDependency(Class<T> cls) { 33 allowPluginDependency(cls, Dependency.get(cls)); 34 } 35 36 public <T> void allowPluginDependency(Class<T> cls, T obj) { 37 synchronized (mDependencies) { 38 mDependencies.put(cls, obj); 39 } 40 } 41 42 @Override 43 <T> T get(Plugin p, Class<T> cls) { 44 if (!mManager.dependsOn(p, cls)) { 45 throw new IllegalArgumentException(p.getClass() + " does not depend on " + cls); 46 } 47 synchronized (mDependencies) { 48 if (!mDependencies.containsKey(cls)) { 49 throw new IllegalArgumentException("Unknown dependency " + cls); 50 } 51 return (T) mDependencies.get(cls); 52 } 53 } 54 } 55
