/* * 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.cache; import com.google.common.annotations.Beta; import com.google.common.collect.ImmutableMap; import com.google.common.collect.Maps; import com.google.common.util.concurrent.UncheckedExecutionException; import java.util.Map; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; /** * This class provides a skeletal implementation of the {@code Cache} interface to minimize the * effort required to implement this interface. * *
To implement a cache, the programmer needs only to extend this class and provide an
* implementation for the {@link #get} and {@link #getIfPresent} methods. {@link #getUnchecked},
* {@link #get(K, Callable)}, and {@link #getAll} are implemented in terms of {@code get};
* {@link #getAllPresent} is implemented in terms of {@code get}; {@link #invalidateAll(Iterable)}
* is implemented in terms of {@link #invalidate}. The method {@link #cleanUp} is a no-op. All other
* methods throw an {@link UnsupportedOperationException}.
*
* @author Charles Fry
* @since 11.0
*/
@Beta
public abstract class AbstractLoadingCache