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package com.wireguard.android.databinding;
import android.databinding.MapChangeRegistry;
import android.databinding.ObservableMap;
import android.support.annotation.NonNull;
import java.util.Map;
import java.util.TreeMap;
/**
* Observable version of a TreeMap. Only notifies for changes made through methods, not iterators or
* views. This behavior is in line with that of ObservableArrayMap.
*/
public class ObservableTreeMap<K, V> extends TreeMap<K, V> implements ObservableSortedMap<K, V> {
private transient MapChangeRegistry listeners;
@Override
public void clear() {
super.clear();
notifyChange(null);
}
@Override
public void addOnMapChangedCallback(
final OnMapChangedCallback<? extends ObservableMap<K, V>, K, V> listener) {
if (listeners == null)
listeners = new MapChangeRegistry();
listeners.add(listener);
}
private void notifyChange(final K key) {
if (listeners != null)
listeners.notifyChange(this, key);
}
@Override
public V put(final K key, final V value) {
final V oldValue = super.put(key, value);
notifyChange(key);
return oldValue;
}
@Override
public void putAll(@NonNull final Map<? extends K, ? extends V> map) {
super.putAll(map);
for (final K key : map.keySet())
notifyChange(key);
}
@Override
public V remove(final Object key) {
final V oldValue = super.remove(key);
@SuppressWarnings("unchecked")
final K k = (K) key;
notifyChange(k);
return oldValue;
}
@Override
public void removeOnMapChangedCallback(
final OnMapChangedCallback<? extends ObservableMap<K, V>, K, V> listener) {
if (listeners != null)
listeners.remove(listener);
}
}
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