/*
* 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.
*/
using System;
using IndexReader = Lucene.Net.Index.IndexReader;
namespace Lucene.Net.Search
{
/// Provides caching of {@link Filter}s themselves on the remote end of an RMI connection.
/// The cache is keyed on Filter's hashCode(), so if it sees the same filter twice
/// it will reuse the original version.
///
/// NOTE: This does NOT cache the Filter bits, but rather the Filter itself.
/// Thus, this works hand-in-hand with {@link CachingWrapperFilter} to keep both
/// file Filter cache and the Filter bits on the remote end, close to the searcher.
///
/// Usage:
///
/// To cache a result you must do something like
/// RemoteCachingWrapperFilter f = new RemoteCachingWrapperFilter(new CachingWrapperFilter(myFilter));
///
///
/// Matt Ericson
///
[Serializable]
public class RemoteCachingWrapperFilter : Filter
{
protected internal Filter filter;
public RemoteCachingWrapperFilter(Filter filter)
{
this.filter = filter;
}
/// Uses the {@link FilterManager} to keep the cache for a filter on the
/// searcher side of a remote connection.
///
/// the index reader for the Filter
///
/// the bitset
///
public override System.Collections.BitArray Bits(IndexReader reader)
{
Filter cachedFilter = FilterManager.GetInstance().GetFilter(filter);
return cachedFilter.Bits(reader);
}
}
}