/*
* 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{
sealed class SegmentMergeInfo
{
internal Term term;
internal int base_Renamed;
internal TermEnum termEnum;
internal IndexReader reader;
private TermPositions postings; // use getPositions()
private int[] docMap; // use getDocMap()
internal SegmentMergeInfo(int b, TermEnum te, IndexReader r)
{
base_Renamed = b;
reader = r;
termEnum = te;
term = te.Term();
}
// maps around deleted docs
internal int[] GetDocMap()
{
if (docMap == null)
{
// build array which maps document numbers around deletions
if (reader.HasDeletions())
{
int maxDoc = reader.MaxDoc();
docMap = new int[maxDoc];
int j = 0;
for (int i = 0; i < maxDoc; i++)
{
if (reader.IsDeleted(i))
docMap[i] = - 1;
else
docMap[i] = j++;
}
}
}
return docMap;
}
internal TermPositions GetPositions()
{
if (postings == null)
{
postings = reader.TermPositions();
}
return postings;
}
internal bool Next()
{
if (termEnum.Next())
{
term = termEnum.Term();
return true;
}
else
{
term = null;
return false;
}
}
internal void Close()
{
termEnum.Close();
if (postings != null)
{
postings.Close();
}
}
}
}
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