81 lines
2.1 KiB
Java
81 lines
2.1 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 game.collect;
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import java.io.InvalidObjectException;
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import java.io.ObjectInputStream;
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import java.io.Serializable;
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/**
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* List returned by {@link ImmutableCollection#asList} that delegates {@code contains} checks
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* to the backing collection.
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*
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* @author Jared Levy
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* @author Louis Wasserman
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*/
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abstract class ImmutableAsList<E> extends ImmutableList<E> {
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abstract ImmutableCollection<E> delegateCollection();
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@Override public boolean contains(Object target) {
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// The collection's contains() is at least as fast as ImmutableList's
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// and is often faster.
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return delegateCollection().contains(target);
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}
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@Override
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public int size() {
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return delegateCollection().size();
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}
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@Override
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public boolean isEmpty() {
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return delegateCollection().isEmpty();
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}
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@Override
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boolean isPartialView() {
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return delegateCollection().isPartialView();
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}
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/**
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* Serialized form that leads to the same performance as the original list.
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*/
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static class SerializedForm implements Serializable {
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final ImmutableCollection<?> collection;
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SerializedForm(ImmutableCollection<?> collection) {
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this.collection = collection;
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}
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Object readResolve() {
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return collection.asList();
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}
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private static final long serialVersionUID = 0;
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}
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private void readObject(ObjectInputStream stream)
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throws InvalidObjectException {
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throw new InvalidObjectException("Use SerializedForm");
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}
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@Override Object writeReplace() {
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return new SerializedForm(delegateCollection());
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}
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}
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