/*
* Copyright 2014 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
*
* 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 org.gradle.api.internal.cache;
import org.gradle.cache.PersistentIndexedCache;
import org.gradle.internal.Factory;
public class MinimalPersistentCache<K, V> implements Cache<K, V> {
private final PersistentIndexedCache<K, V> cache;
public MinimalPersistentCache(PersistentIndexedCache<K, V> cache) {
this.cache = cache;
}
@Override
public V get(K key, Factory<V> factory) {
V cached = cache.get(key);
if (cached != null) {
return cached;
}
V value = factory.create(); //don't synchronize value creation
//we could potentially avoid creating value that is already being created by a different thread.
cache.put(key, value);
return value;
}
public V get(K value) {
return cache.get(value);
}
}