/* * 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; using Query = Lucene.Net.Search.Query; using Searcher = Lucene.Net.Search.Searcher; using Weight = Lucene.Net.Search.Weight; namespace Lucene.Net.Search.Spans { /// Base class for span-based queries. [Serializable] public abstract class SpanQuery:Query { /// Expert: Returns the matches for this query in an index. Used internally /// to search for spans. /// public abstract Spans GetSpans(IndexReader reader); /// Returns the name of the Field matched by this query. public abstract System.String GetField(); /// Returns a collection of all terms matched by this query. public abstract System.Collections.ICollection GetTerms(); protected internal override Weight CreateWeight(Searcher searcher) { return new SpanWeight(this, searcher); } } }