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ImmutableEntry.java
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/
ImmutableEntry.java
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/*
* 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 java.io.Serializable;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* An immutable {@code Map.Entry}, used both by {@link
* com.google.common.collect.Maps#immutableEntry(Object, Object)} and by other parts of {@code
* common.collect} as a superclass.
*/
@GwtCompatible(serializable = true)
@ElementTypesAreNonnullByDefault
class ImmutableEntry<K extends @Nullable Object, V extends @Nullable Object>
extends AbstractMapEntry<K, V> implements Serializable {
@ParametricNullness final K key;
@ParametricNullness final V value;
ImmutableEntry(@ParametricNullness K key, @ParametricNullness V value) {
this.key = key;
this.value = value;
}
@Override
@ParametricNullness
public final K getKey() {
return key;
}
@Override
@ParametricNullness
public final V getValue() {
return value;
}
@Override
@ParametricNullness
public final V setValue(@ParametricNullness V value) {
throw new UnsupportedOperationException();
}
private static final long serialVersionUID = 0;
}