11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2008 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); you may not 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * use this file except in compliance with the License. You may obtain a copy of 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * License for the specific language governing permissions and limitations under 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.collect; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.annotations.GwtCompatible; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport javax.annotation.Nullable; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * An empty immutable multiset. 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Jared Levy 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Louis Wasserman 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert@GwtCompatible(serializable = true) 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertfinal class EmptyImmutableMultiset extends ImmutableMultiset<Object> { 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert static final EmptyImmutableMultiset INSTANCE = new EmptyImmutableMultiset(); 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public int count(@Nullable Object element) { 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return 0; 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public ImmutableSet<Object> elementSet() { 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return ImmutableSet.of(); 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public int size() { 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return 0; 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert UnmodifiableIterator<Entry<Object>> entryIterator() { 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return Iterators.emptyIterator(); 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert int distinctElements() { 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return 0; 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert boolean isPartialView() { 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return false; 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert ImmutableSet<Entry<Object>> createEntrySet() { 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return ImmutableSet.of(); 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert private static final long serialVersionUID = 0; 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 70