1 /* 2 * Copyright (C) 2009 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.collect; 18 19 import java.util.Collections; 20 21 /** 22 * GWT emulation of {@link EmptyImmutableBiMap}. 23 * 24 * @author Hayward Chan 25 */ 26 @SuppressWarnings("serial") 27 final class EmptyImmutableBiMap extends ImmutableBiMap<Object, Object> { 28 static final EmptyImmutableBiMap INSTANCE = new EmptyImmutableBiMap(); 29 30 private EmptyImmutableBiMap() { 31 super(Collections.emptyMap()); 32 } 33 @Override public ImmutableBiMap<Object, Object> inverse() { 34 return this; 35 } 36 } 37
