/*
* Copyright (C) 2008 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 com.google.common.annotations.
GwtIncompatible;
import java.io.
Serializable;
import java.util.
Map.
Entry;
import javax.annotation.
Nullable;
/**
* {@code entrySet()} implementation for {@link ImmutableMap}.
*
* @author Jesse Wilson
* @author Kevin Bourrillion
*/
@
GwtCompatible(emulated = true)
abstract class
ImmutableMapEntrySet<K, V> extends
ImmutableSet<
Entry<K, V>> {
ImmutableMapEntrySet() {}
abstract
ImmutableMap<K, V>
map();
@
Override
public int
size() {
return
map().
size();
}
@
Override
public boolean
contains(@
Nullable Object object) {
if (
object instanceof
Entry) {
Entry<?, ?>
entry = (
Entry<?, ?>)
object;
V
value =
map().
get(
entry.
getKey());
return
value != null &&
value.
equals(
entry.
getValue());
}
return false;
}
@
Override
boolean
isPartialView() {
return
map().
isPartialView();
}
@
GwtIncompatible("serialization")
@
Override
Object writeReplace() {
return new
EntrySetSerializedForm<K, V>(
map());
}
@
GwtIncompatible("serialization")
private static class
EntrySetSerializedForm<K, V> implements
Serializable {
final
ImmutableMap<K, V>
map;
EntrySetSerializedForm(
ImmutableMap<K, V>
map) {
this.
map =
map;
}
Object readResolve() {
return
map.
entrySet();
}
private static final long
serialVersionUID = 0;
}
}