| /* |
| * Copyright (C) 2020 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 com.android.internal.telephony; |
| |
| import android.util.ArrayMap; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| |
| /** |
| * A very basic bidirectional map. |
| */ |
| public class BiMap<K, V> { |
| private Map<K, V> mPrimaryMap = new ArrayMap<>(); |
| private Map<V, K> mSecondaryMap = new ArrayMap<>(); |
| |
| public boolean put(K key, V value) { |
| if (key == null || value == null || mPrimaryMap.containsKey(key) || |
| mSecondaryMap.containsKey(value)) { |
| return false; |
| } |
| |
| mPrimaryMap.put(key, value); |
| mSecondaryMap.put(value, key); |
| return true; |
| } |
| |
| public boolean remove(K key) { |
| if (key == null) { |
| return false; |
| } |
| if (mPrimaryMap.containsKey(key)) { |
| V value = getValue(key); |
| mPrimaryMap.remove(key); |
| mSecondaryMap.remove(value); |
| return true; |
| } |
| return false; |
| } |
| |
| public boolean removeValue(V value) { |
| if (value == null) { |
| return false; |
| } |
| return remove(getKey(value)); |
| } |
| |
| public V getValue(K key) { |
| return mPrimaryMap.get(key); |
| } |
| |
| public K getKey(V value) { |
| return mSecondaryMap.get(value); |
| } |
| |
| public Collection<V> getValues() { |
| return mPrimaryMap.values(); |
| } |
| |
| public void clear() { |
| mPrimaryMap.clear(); |
| mSecondaryMap.clear(); |
| } |
| } |