40 lines
1.2 KiB
Java
40 lines
1.2 KiB
Java
/*
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* Copyright (C) 2009 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.collect;
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import com.google.common.annotations.GwtCompatible;
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/**
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* Implementation of {@link ImmutableListMultimap} with no entries.
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*
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* @author Mike Ward
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*/
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@GwtCompatible(serializable = true)
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class EmptyImmutableSetMultimap extends ImmutableSetMultimap<Object, Object> {
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static final EmptyImmutableSetMultimap INSTANCE = new EmptyImmutableSetMultimap();
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private EmptyImmutableSetMultimap() {
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super(ImmutableMap.<Object, ImmutableSet<Object>>of(), 0, null);
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}
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private Object readResolve() {
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return INSTANCE; // preserve singleton property
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}
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private static final long serialVersionUID = 0;
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}
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