/*
* Copyright (C) 2011 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 com.google.common.annotations.
GwtCompatible;
import java.util.
Map;
import javax.annotation.
Nullable;
/**
* Implementation of {@link ImmutableMultiset} with zero or more elements.
*
* @author Jared Levy
* @author Louis Wasserman
*/
@
GwtCompatible(serializable = true)
@
SuppressWarnings("serial")
// uses writeReplace(), not default serialization
class
RegularImmutableMultiset<E> extends
ImmutableMultiset<E> {
private final transient
ImmutableMap<E,
Integer>
map;
private final transient int
size;
RegularImmutableMultiset(
ImmutableMap<E,
Integer>
map, int
size) {
this.
map =
map;
this.
size =
size;
}
@
Override
boolean
isPartialView() {
return
map.
isPartialView();
}
@
Override
public int
count(@
Nullable Object element) {
Integer value =
map.
get(
element);
return (
value == null) ? 0 :
value;
}
@
Override
public int
size() {
return
size;
}
@
Override
public boolean
contains(@
Nullable Object element) {
return
map.
containsKey(
element);
}
@
Override
public
ImmutableSet<E>
elementSet() {
return
map.
keySet();
}
@
Override
Entry<E>
getEntry(int
index) {
Map.
Entry<E,
Integer>
mapEntry =
map.
entrySet().
asList().
get(
index);
return
Multisets.
immutableEntry(
mapEntry.
getKey(),
mapEntry.
getValue());
}
@
Override
public int
hashCode() {
return
map.
hashCode();
}
}