| /* |
| * Copyright (C) 2008 The Guava Authors |
| * |
| * 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.google.common.collect; |
| |
| import java.util.HashMap; |
| |
| /** |
| * GWT emulation of {@link RegularImmutableBiMap}. |
| * |
| * @author Jared Levy |
| * @author Hayward Chan |
| */ |
| @SuppressWarnings("serial") |
| class RegularImmutableBiMap<K, V> extends ImmutableBiMap<K, V> { |
| static final RegularImmutableBiMap<Object, Object> EMPTY = |
| new RegularImmutableBiMap<Object, Object>(); |
| |
| // This reference is used both by the GWT compiler to infer the elements |
| // of the lists that needs to be serialized. |
| private ImmutableBiMap<V, K> inverse; |
| |
| RegularImmutableBiMap() { |
| super(new RegularImmutableMap<K, V>(new HashMap<K, V>())); |
| this.inverse = (ImmutableBiMap<V, K>) this; |
| } |
| |
| RegularImmutableBiMap(ImmutableMap<K, V> delegate) { |
| super(delegate); |
| |
| ImmutableMap.Builder<V, K> builder = ImmutableMap.builder(); |
| for (Entry<K, V> entry : delegate.entrySet()) { |
| builder.put(entry.getValue(), entry.getKey()); |
| } |
| ImmutableMap<V, K> backwardMap = builder.build(); |
| this.inverse = new RegularImmutableBiMap<V, K>(backwardMap, this); |
| } |
| |
| RegularImmutableBiMap(ImmutableMap<K, V> delegate, ImmutableBiMap<V, K> inverse) { |
| super(delegate); |
| this.inverse = inverse; |
| } |
| |
| @Override |
| public ImmutableBiMap<V, K> inverse() { |
| return inverse; |
| } |
| } |