spring SimpleValueWrapper 源码
spring SimpleValueWrapper 代码
文件路径：/spring-context/src/main/java/org/springframework/cache/support/SimpleValueWrapper.java
/*
* Copyright 2002-2017 the original author or 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
*
* https://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 org.springframework.cache.support;
import org.springframework.cache.Cache.ValueWrapper;
import org.springframework.lang.Nullable;
/**
* Straightforward implementation of {@link org.springframework.cache.Cache.ValueWrapper},
* simply holding the value as given at construction and returning it from {@link #get()}.
*
* @author Costin Leau
* @since 3.1
*/
public class SimpleValueWrapper implements ValueWrapper {
@Nullable
private final Object value;
/**
* Create a new SimpleValueWrapper instance for exposing the given value.
* @param value the value to expose (may be {@code null})
*/
public SimpleValueWrapper(@Nullable Object value) {
this.value = value;
}
/**
* Simply returns the value as given at construction time.
*/
@Override
@Nullable
public Object get() {
return this.value;
}
}
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