blob: 523098adae4e6b9c7a6fc90100b7982a00689a41 [file] [log] [blame]
/*
* Copyright (C) 2008 Google Inc.
*
* 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 com.google.common.annotations.GwtCompatible;
/**
* An empty immutable multiset.
*
* @author Jared Levy
*/
@GwtCompatible(serializable = true)
final class EmptyImmutableMultiset extends ImmutableMultiset<Object> {
static final EmptyImmutableMultiset INSTANCE = new EmptyImmutableMultiset();
private EmptyImmutableMultiset() {
super(ImmutableMap.<Object, Integer>of(), 0);
}
Object readResolve() {
return INSTANCE; // preserve singleton property
}
private static final long serialVersionUID = 0;
}