TermPositionVector.cs
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上传日期:2013-09-30
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- /*
- * 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;
- namespace Lucene.Net.Index
- {
-
- /// <summary>Extends <code>TermFreqVector</code> to provide additional information about
- /// positions in which each of the terms is found. A TermPositionVector not necessarily
- /// contains both positions and offsets, but at least one of these arrays exists.
- /// </summary>
- public interface TermPositionVector : TermFreqVector
- {
-
- /// <summary>Returns an array of positions in which the term is found.
- /// Terms are identified by the index at which its number appears in the
- /// term String array obtained from the <code>indexOf</code> method.
- /// May return null if positions have not been stored.
- /// </summary>
- int[] GetTermPositions(int index);
-
- /// <summary> Returns an array of TermVectorOffsetInfo in which the term is found.
- /// May return null if offsets have not been stored.
- ///
- /// </summary>
- /// <seealso cref="Lucene.Net.analysis.Token">
- ///
- /// </seealso>
- /// <param name="index">The position in the array to get the offsets from
- /// </param>
- /// <returns> An array of TermVectorOffsetInfo objects or the empty list
- /// </returns>
- TermVectorOffsetInfo[] GetOffsets(int index);
- }
- }