freemarker.cache.NullCacheStorage Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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();
@Override
public boolean isConcurrent() {
return true;
}
@Override
public Object get(Object key) {
return null;
}
@Override
public void put(Object key, Object value) {
// do nothing
}
@Override
public void remove(Object key) {
// do nothing
}
@Override
public void clear() {
// do nothing
}
/**
* Always returns 0.
*
* @since 2.3.21
*/
@Override
public int getSize() {
return 0;
}
}