String quickTisTxt=IndexFileNames.segmentFileName(segment, IndexFileNames.TERMS_EXTENSION_QUICK_TXT);
String quickTisVal=IndexFileNames.segmentFileName(segment, IndexFileNames.TERMS_EXTENSION_QUICK_VAL);
if(directory.fileExists(tisFileSize))
{
IndexInput sizebuff=directory.openInput(tisFileSize, readBufferSize);
tisfilesize=sizebuff.readLong();
if(directory.fileExists(quickTis))
{
docValues=new DocValuesReader();