/*
* 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 IndexInputLucene.Net.Store.IndexInput;
namespace Lucene.Net.Index{
sealed class SegmentTermPositions : SegmentTermDocs, TermPositions
{
private IndexInput proxStream;
private int proxCount;
private int position;
internal SegmentTermPositions(SegmentReader p) : base(p)
{
this.proxStream = (IndexInput) parent.proxStream.Clone();
}
internal override void Seek(TermInfo ti)
{
base.Seek(ti);
if (ti != null)
proxStream.Seek(ti.proxPointer);
proxCount = 0;
}
public override void Close()
{
base.Close();
proxStream.Close();
}
public int NextPosition()
{
proxCount--;
return position += proxStream.ReadVInt();
}
protected internal override void SkippingDoc()
{
for (int f = freq; f > 0; f--)
// skip all positions
proxStream.ReadVInt();
}
public override bool Next()
{
for (int f = proxCount; f > 0; f--)
// skip unread positions
proxStream.ReadVInt();
if (base.Next())
{
// run super
proxCount = freq; // note frequency
position = 0; // reset position
return true;
}
return false;
}
public override int Read(int[] docs, int[] freqs)
{
throw new System.NotSupportedException("TermPositions does not support processing multiple documents in one call. Use TermDocs instead.");
}
/// <summary>Called by super.skipTo(). </summary>
protected internal override void SkipProx(long proxPointer)
{
proxStream.Seek(proxPointer);
proxCount = 0;
}
}
}
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