/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* 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 freemarker.cache;
/**
* A cache storage that doesn't store anything. Use this if you
* don't want caching.
*
* @see freemarker.template.Configuration#setCacheStorage(CacheStorage)
*
* @since 2.3.17
*/
public class NullCacheStorage implements ConcurrentCacheStorage, CacheStorageWithGetSize {
/**
* @since 2.3.22
*/
public static final NullCacheStorage INSTANCE = new NullCacheStorage();
public boolean isConcurrent() {
return true;
}
public Object get(Object key) {
return null;
}
public void put(Object key, Object value) {
// do nothing
}
public void remove(Object key) {
// do nothing
}
public void clear() {
// do nothing
}
/**
* Always returns 0.
*
* @since 2.3.21
*/
public int getSize() {
return 0;
}
}