/*
* 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 DocumentLucene.Net.Documents.Document;
using FieldLucene.Net.Documents.Field;
namespace Lucene.Net.Index{
/// <summary>A <code>FilterIndexReader</code> contains another IndexReader, which it
/// uses as its basic source of data, possibly transforming the data along the
/// way or providing additional functionality. The class
/// <code>FilterIndexReader</code> itself simply implements all abstract methods
/// of <code>IndexReader</code> with versions that pass all requests to the
/// contained index reader. Subclasses of <code>FilterIndexReader</code> may
/// further override some of these methods and may also provide additional
/// methods and fields.
/// </summary>
public class FilterIndexReader : IndexReader
{
/// <summary>Base class for filtering {@link TermDocs} implementations. </summary>
public class FilterTermDocs : TermDocs
{
protected internal TermDocs in_Renamed;
public FilterTermDocs(TermDocs in_Renamed)
{
this.in_Renamed = in_Renamed;
}
public virtual void Seek(Term term)
{
in_Renamed.Seek(term);
}
public virtual void Seek(TermEnum termEnum)
{
in_Renamed.Seek(termEnum);
}
public virtual int Doc()
{
return in_Renamed.Doc();
}
public virtual int Freq()
{
return in_Renamed.Freq();
}
public virtual bool Next()
{
return in_Renamed.Next();
}
public virtual int Read(int[] docs, int[] freqs)
{
return in_Renamed.Read(docs, freqs);
}
public virtual bool SkipTo(int i)
{
return in_Renamed.SkipTo(i);
}
public virtual void Close()
{
in_Renamed.Close();
}
}
/// <summary>Base class for filtering {@link TermPositions} implementations. </summary>
public class FilterTermPositions : FilterTermDocs, TermPositions
{
public FilterTermPositions(TermPositions in_Renamed) : base(in_Renamed)
{
}
public virtual int NextPosition()
{
return ((TermPositions) this.in_Renamed).NextPosition();
}
}
/// <summary>Base class for filtering {@link TermEnum} implementations. </summary>
public class FilterTermEnum : TermEnum
{
protected internal TermEnum in_Renamed;
public FilterTermEnum(TermEnum in_Renamed)
{
this.in_Renamed = in_Renamed;
}
public override bool Next()
{
return in_Renamed.Next();
}
public override Term Term()
{
return in_Renamed.Term();
}
public override int DocFreq()
{
return in_Renamed.DocFreq();
}
public override void Close()
{
in_Renamed.Close();
}
}
protected internal IndexReader in_Renamed;
/// <summary> <p>Construct a FilterIndexReader based on the specified base reader.
/// Directory locking for delete, undeleteAll, and setNorm operations is
/// left to the base reader.</p>
/// <p>Note that base reader is closed if this FilterIndexReader is closed.</p>
/// </summary>
/// <param name="in">specified base reader.
/// </param>
public FilterIndexReader(IndexReader in_Renamed):base(in_Renamed.Directory())
{
this.in_Renamed = in_Renamed;
}
public override TermFreqVector[] GetTermFreqVectors(int docNumber)
{
return in_Renamed.GetTermFreqVectors(docNumber);
}
public override TermFreqVector GetTermFreqVector(int docNumber, System.String field)
{
return in_Renamed.GetTermFreqVector(docNumber, field);
}
public override int NumDocs()
{
return in_Renamed.NumDocs();
}
public override int MaxDoc()
{
return in_Renamed.MaxDoc();
}
public override Document Document(int n)
{
return in_Renamed.Document(n);
}
public override bool IsDeleted(int n)
{
return in_Renamed.IsDeleted(n);
}
public override bool HasDeletions()
{
return in_Renamed.HasDeletions();
}
protected internal override void DoUndeleteAll()
{
in_Renamed.UndeleteAll();
}
public override bool HasNorms(System.String field)
{
return in_Renamed.HasNorms(field);
}
public override byte[] Norms(System.String f)
{
return in_Renamed.Norms(f);
}
public override void Norms(System.String f, byte[] bytes, int offset)
{
in_Renamed.Norms(f, bytes, offset);
}
protected internal override void DoSetNorm(int d, System.String f, byte b)
{
in_Renamed.SetNorm(d, f, b);
}
public override TermEnum Terms()
{
return in_Renamed.Terms();
}
public override TermEnum Terms(Term t)
{
return in_Renamed.Terms(t);
}
public override int DocFreq(Term t)
{
return in_Renamed.DocFreq(t);
}
public override TermDocs TermDocs()
{
return in_Renamed.TermDocs();
}
public override TermPositions TermPositions()
{
return in_Renamed.TermPositions();
}
protected internal override void DoDelete(int n)
{
in_Renamed.Delete(n);
}
protected internal override void DoCommit()
{
in_Renamed.Commit();
}
protected internal override void DoClose()
{
in_Renamed.Close();
}
public override System.Collections.ICollection GetFieldNames()
{
return in_Renamed.GetFieldNames();
}
public override System.Collections.ICollection GetFieldNames(bool indexed)
{
return in_Renamed.GetFieldNames(indexed);
}
public override System.Collections.ICollection GetIndexedFieldNames(Field.TermVector tvSpec)
{
return in_Renamed.GetIndexedFieldNames(tvSpec);
}
public override System.Collections.ICollection GetFieldNames(IndexReader.FieldOption fieldNames)
{
return in_Renamed.GetFieldNames(fieldNames);
}
}
}
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