Lucene.Net  3.0.3
Lucene.Net is a .NET port of the Java Lucene Indexing Library
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AbstractAllTermDocs.cs
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2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
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8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
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14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 using System;
19 
20 namespace Lucene.Net.Index
21 {
31  public abstract class AbstractAllTermDocs : TermDocs
32  {
33  protected int maxDoc;
34  protected int internalDoc = -1;
35 
36  protected AbstractAllTermDocs(int maxDoc)
37  {
38  this.maxDoc = maxDoc;
39  }
40 
41  public void Seek(Term term)
42  {
43  if (term == null)
44  {
45  internalDoc = -1;
46  }
47  else
48  {
49  throw new NotSupportedException();
50  }
51  }
52 
53  public void Seek(TermEnum termEnum)
54  {
55  throw new NotSupportedException();
56  }
57 
58  public int Doc
59  {
60  get { return internalDoc; }
61  }
62 
63  public int Freq
64  {
65  get { return 1; }
66  }
67 
68  public bool Next()
69  {
70  return SkipTo(internalDoc + 1);
71  }
72 
73  public int Read(int[] docs, int[] freqs)
74  {
75  int length = docs.Length;
76  int i = 0;
77  while (i < length && internalDoc < maxDoc)
78  {
79  if (!IsDeleted(internalDoc))
80  {
81  docs[i] = internalDoc;
82  freqs[i] = 1;
83  ++i;
84  }
85  internalDoc++;
86  }
87  return i;
88  }
89 
90  public bool SkipTo(int target)
91  {
92  internalDoc = target;
93  while (internalDoc < maxDoc)
94  {
95  if (!IsDeleted(internalDoc))
96  {
97  return true;
98  }
99  internalDoc++;
100  }
101  return false;
102  }
103 
104  public void Close()
105  {
106  Dispose();
107  }
108 
109  public void Dispose()
110  {
111  Dispose(true);
112  }
113 
114  protected abstract void Dispose(bool disposing);
115 
116  public abstract bool IsDeleted(int doc);
117  }
118 }