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/**
* Copyright (C) 2013-2014 [email protected]
*
* 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 net.codestory.http.misc;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
public class Cache implements Function {
private final Function delegate;
private final Map keyValues;
public Cache(Function delegate) {
this.delegate = delegate;
this.keyValues = new ConcurrentHashMap<>();
}
@Override
public V apply(K key) {
return keyValues.computeIfAbsent(key, delegate);
}
}
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