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/*
* 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);
}
}
}
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