001/*
002 * Copyright 2002-2017 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.cache.support;
018
019import org.springframework.cache.Cache.ValueWrapper;
020import org.springframework.lang.Nullable;
021
022/**
023 * Straightforward implementation of {@link org.springframework.cache.Cache.ValueWrapper},
024 * simply holding the value as given at construction and returning it from {@link #get()}.
025 *
026 * @author Costin Leau
027 * @since 3.1
028 */
029public class SimpleValueWrapper implements ValueWrapper {
030
031        @Nullable
032        private final Object value;
033
034
035        /**
036         * Create a new SimpleValueWrapper instance for exposing the given value.
037         * @param value the value to expose (may be {@code null})
038         */
039        public SimpleValueWrapper(@Nullable Object value) {
040                this.value = value;
041        }
042
043
044        /**
045         * Simply returns the value as given at construction time.
046         */
047        @Override
048        @Nullable
049        public Object get() {
050                return this.value;
051        }
052
053}