SegmentTermPositionVector.cs
上传用户:zhangkuixh
上传日期:2013-09-30
资源大小:5473k
文件大小:2k
- /*
- * 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
- {
-
- public class SegmentTermPositionVector : SegmentTermVector, TermPositionVector
- {
- protected internal int[][] positions;
- protected internal TermVectorOffsetInfo[][] offsets;
- public static readonly int[] EMPTY_TERM_POS = new int[0];
-
- public SegmentTermPositionVector(System.String field, System.String[] terms, int[] termFreqs, int[][] positions, TermVectorOffsetInfo[][] offsets):base(field, terms, termFreqs)
- {
- this.offsets = offsets;
- this.positions = positions;
- }
-
- /// <summary> Returns an array of TermVectorOffsetInfo in which the term is found.
- ///
- /// </summary>
- /// <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>
- /// <seealso cref="Lucene.Net.analysis.Token">
- /// </seealso>
- public virtual TermVectorOffsetInfo[] GetOffsets(int index)
- {
- TermVectorOffsetInfo[] result = TermVectorOffsetInfo.EMPTY_OFFSET_INFO;
- if (offsets == null)
- return null;
- if (index >= 0 && index < offsets.Length)
- {
- result = offsets[index];
- }
- return result;
- }
-
- /// <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.
- /// </summary>
- public virtual int[] GetTermPositions(int index)
- {
- int[] result = EMPTY_TERM_POS;
- if (positions == null)
- return null;
- if (index >= 0 && index < positions.Length)
- {
- result = positions[index];
- }
-
- return result;
- }
- }
- }