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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2003-2014 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.
*
* Derived from Boon all rights granted to Groovy project for this fork.
*/
package groovy.json.internal;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* @author Richard Hightower
*/
public class SimpleCache implements Cache {
Map map = new LinkedHashMap();
private static class InternalCacheLinkedList extends LinkedHashMap {
final int limit;
InternalCacheLinkedList(final int limit, final boolean lru) {
super(16, 0.75f, lru);
this.limit = limit;
}
protected final boolean removeEldestEntry(final Map.Entry eldest) {
return super.size() > limit;
}
}
public SimpleCache(final int limit, CacheType type) {
if (type.equals(CacheType.LRU)) {
map = new InternalCacheLinkedList(limit, true);
} else {
map = new InternalCacheLinkedList(limit, false);
}
}
public SimpleCache(final int limit) {
map = new InternalCacheLinkedList(limit, true);
}
public void put(K key, V value) {
map.put(key, value);
}
public V get(K key) {
return map.get(key);
}
//For testing only
public V getSilent(K key) {
V value = map.get(key);
if (value != null) {
map.remove(key);
map.put(key, value);
}
return value;
}
public void remove(K key) {
map.remove(key);
}
public int size() {
return map.size();
}
public String toString() {
return map.toString();
}
}