NonMatchingScorer.cs
上传用户:zhangkuixh
上传日期:2013-09-30
资源大小:5473k
文件大小:1k
- /*
- * 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.Search
- {
-
- /// <summary>A scorer that matches no document at all. </summary>
- class NonMatchingScorer : Scorer
- {
- public NonMatchingScorer() : base(null)
- {
- } // no similarity used
-
- public override int Doc()
- {
- throw new System.NotSupportedException();
- }
-
- public override bool Next()
- {
- return false;
- }
-
- public override float Score()
- {
- throw new System.NotSupportedException();
- }
-
- public override bool SkipTo(int target)
- {
- return false;
- }
-
- public override Explanation Explain(int doc)
- {
- Explanation e = new Explanation();
- e.SetDescription("No document matches.");
- return e;
- }
- }
- }