| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * 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 android.databinding; |
| |
| import android.support.v4.util.ArrayMap; |
| |
| import java.util.Collection; |
| |
| public class ObservableArrayMap<K, V> extends ArrayMap<K, V> implements ObservableMap<K, V> { |
| |
| private transient MapChangeRegistry mListeners; |
| |
| @Override |
| public void addOnMapChangedCallback( |
| OnMapChangedCallback<? extends ObservableMap<K, V>, K, V> listener) { |
| if (mListeners == null) { |
| mListeners = new MapChangeRegistry(); |
| } |
| mListeners.add(listener); |
| } |
| |
| @Override |
| public void removeOnMapChangedCallback( |
| OnMapChangedCallback<? extends ObservableMap<K, V>, K, V> listener) { |
| if (mListeners != null) { |
| mListeners.remove(listener); |
| } |
| } |
| |
| @Override |
| public void clear() { |
| boolean wasEmpty = isEmpty(); |
| if (!wasEmpty) { |
| super.clear(); |
| notifyChange(null); |
| } |
| } |
| |
| public V put(K k, V v) { |
| V val = super.put(k, v); |
| notifyChange(k); |
| return v; |
| } |
| |
| @Override |
| public boolean removeAll(Collection<?> collection) { |
| boolean removed = false; |
| for (Object key : collection) { |
| int index = indexOfKey(key); |
| if (index >= 0) { |
| removed = true; |
| removeAt(index); |
| } |
| } |
| return removed; |
| } |
| |
| @Override |
| public boolean retainAll(Collection<?> collection) { |
| boolean removed = false; |
| for (int i = size() - 1; i >= 0; i--) { |
| Object key = keyAt(i); |
| if (!collection.contains(key)) { |
| removeAt(i); |
| removed = true; |
| } |
| } |
| return removed; |
| } |
| |
| @Override |
| public V removeAt(int index) { |
| K key = keyAt(index); |
| V value = super.removeAt(index); |
| if (value != null) { |
| notifyChange(key); |
| } |
| return value; |
| } |
| |
| @Override |
| public V setValueAt(int index, V value) { |
| K key = keyAt(index); |
| V oldValue = super.setValueAt(index, value); |
| notifyChange(key); |
| return oldValue; |
| } |
| |
| private void notifyChange(Object key) { |
| if (mListeners != null) { |
| mListeners.notifyCallbacks(this, 0, key); |
| } |
| } |
| } |