001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.commons.jcs.jcache;
020
021import javax.cache.Cache;
022import javax.cache.integration.CacheWriter;
023import javax.cache.integration.CacheWriterException;
024import java.util.Collection;
025
026public class NoWriter<K, V> implements CacheWriter<K, V>
027{
028    public static final NoWriter INSTANCE = new NoWriter();
029
030    @Override
031    public void write(final Cache.Entry<? extends K, ? extends V> entry) throws CacheWriterException
032    {
033        // no-op
034    }
035
036    @Override
037    public void delete(final Object key) throws CacheWriterException
038    {
039        // no-op
040    }
041
042    @Override
043    public void writeAll(final Collection<Cache.Entry<? extends K, ? extends V>> entries) throws CacheWriterException
044    {
045        for (final Cache.Entry<? extends K, ? extends V> entry : entries)
046        {
047            write(entry);
048        }
049    }
050
051    @Override
052    public void deleteAll(final Collection<?> keys) throws CacheWriterException
053    {
054        for (final Object k : keys)
055        {
056            delete(k);
057        }
058    }
059}