internal TermInfosReader(Directory dir, System.String seg, FieldInfos fis, int readBufferSize, int indexDivisor)
{
bool success = false;
if (indexDivisor < 1 && indexDivisor != - 1)
{
throw new System.ArgumentException("indexDivisor must be -1 (don't load terms index) or greater than 0: got " + indexDivisor);
}
try
{
directory = dir;
segment = seg;
fieldInfos = fis;
origEnum = new SegmentTermEnum(directory.OpenInput(segment + "." + IndexFileNames.TERMS_EXTENSION, readBufferSize), fieldInfos, false);
size = origEnum.size;
if (indexDivisor != - 1)
{
// Load terms index
totalIndexInterval = origEnum.indexInterval * indexDivisor;
var indexEnum = new SegmentTermEnum(directory.OpenInput(segment + "." + IndexFileNames.TERMS_INDEX_EXTENSION, readBufferSize), fieldInfos, true);
try
{
int indexSize = 1 + ((int) indexEnum.size - 1) / indexDivisor; // otherwise read index
indexTerms = new Term[indexSize];
indexInfos = new TermInfo[indexSize];
indexPointers = new long[indexSize];
for (int i = 0; indexEnum.Next(); i++)
{
indexTerms[i] = indexEnum.Term;
indexInfos[i] = indexEnum.TermInfo();
indexPointers[i] = indexEnum.indexPointer;
for (int j = 1; j < indexDivisor; j++)
if (!indexEnum.Next())
break;
}
}
finally
{
indexEnum.Close();
}
}
else
{
// Do not load terms index:
totalIndexInterval = - 1;
indexTerms = null;
indexInfos = null;
indexPointers = null;
}
success = true;
}
finally
{
// With lock-less commits, it's entirely possible (and
// fine) to hit a FileNotFound exception above. In
// this case, we want to explicitly close any subset
// of things that were opened so that we don't have to
// wait for a GC to do so.
if (!success)
{
Dispose();
}
}
}
private Term ScanEnum(SegmentTermEnum enumerator, int position)
{
while (enumerator.position < position)
if (!enumerator.Next())
return null;
return enumerator.Term();
}