1 /* 2 * Copyright (C) 2008 Esmertec AG. 3 * Copyright (C) 2008 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package com.android.mms.model; 19 20 import java.util.ArrayList; 21 22 public class Model { 23 protected ArrayList<IModelChangedObserver> mModelChangedObservers = 24 new ArrayList<IModelChangedObserver>(); 25 registerModelChangedObserver(IModelChangedObserver observer)26 public void registerModelChangedObserver(IModelChangedObserver observer) { 27 if (!mModelChangedObservers.contains(observer)) { 28 mModelChangedObservers.add(observer); 29 registerModelChangedObserverInDescendants(observer); 30 } 31 } 32 unregisterModelChangedObserver(IModelChangedObserver observer)33 public void unregisterModelChangedObserver(IModelChangedObserver observer) { 34 mModelChangedObservers.remove(observer); 35 unregisterModelChangedObserverInDescendants(observer); 36 } 37 unregisterAllModelChangedObservers()38 public void unregisterAllModelChangedObservers() { 39 unregisterAllModelChangedObserversInDescendants(); 40 mModelChangedObservers.clear(); 41 } 42 notifyModelChanged(boolean dataChanged)43 protected void notifyModelChanged(boolean dataChanged) { 44 for (IModelChangedObserver observer : mModelChangedObservers) { 45 observer.onModelChanged(this, dataChanged); 46 } 47 } 48 registerModelChangedObserverInDescendants( IModelChangedObserver observer)49 protected void registerModelChangedObserverInDescendants( 50 IModelChangedObserver observer) { 51 // Dummy method. 52 } 53 unregisterModelChangedObserverInDescendants( IModelChangedObserver observer)54 protected void unregisterModelChangedObserverInDescendants( 55 IModelChangedObserver observer) { 56 // Dummy method. 57 } 58 unregisterAllModelChangedObserversInDescendants()59 protected void unregisterAllModelChangedObserversInDescendants() { 60 // Dummy method. 61 } 62 } 63