this.doi = _index.getDocumentIndex();
this.structureName = _structureName;
fileCount = Byte.parseByte(_index.getIndexProperty("index."+structureName+".data-files", "1"));
file = new BitInputStream(getFilename(_index, structureName, fileCount, (byte)0));
if (DEBUG)
file = new DebuggingBitIn(file);
pointerList = _pointerList;
postingIteratorClass = _postingIteratorClass;
fieldCount = _index.getIntIndexProperty("index."+structureName+".fields.count", currentFile = 0);
try{
postingConstructor = fieldCount > 0