/* * Copyright 2004 The Apache Software Foundation * * 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. */ using System; using IndexReader = Lucene.Net.Index.IndexReader; namespace Lucene.Net.Search { /// Abstract base class providing a mechanism to restrict searches to a subset /// of an index. /// [Serializable] public abstract class Filter { /// Returns a BitSet with true for documents which should be permitted in /// search results, and false for those that should not. /// public abstract System.Collections.BitArray Bits(IndexReader reader); } }