public FormatTrackingHSSFListener(HSSFListener childListener) 
{
	   
		this.childListener = childListener;
}

 public int getFormatIndex(CellValueRecordInterface cell) 
{
        ExtendedFormatRecord xfr = (ExtendedFormatRecord)
	    	xfRecords.get(cell.getXFIndex());
	    if(xfr == null) {
	    	System.err.println("Cell " + cell.getRow() + "," + cell.getColumn() + " uses XF with index " + cell.getXFIndex() + ", but we don't have that");
	    	return -1;
	    }
	    return xfr.getFormatIndex();
}

Returns the index of the format string, used by your cell, or -1 if none found

 public String getFormatString(int formatIndex) 
{
    	String format = null;
    	if(formatIndex  >= HSSFDataFormat.getNumberOfBuiltinBuiltinFormats()) {
    		FormatRecord tfr = (FormatRecord)customFormatRecords.get(new Integer(formatIndex));
    		if(tfr == null) {
    			System.err.println("Requested format at index " + formatIndex + ", but it wasn't found");
    		} else {
    			format = tfr.getFormatString();
    		}
    	} else {
        	format = HSSFDataFormat.getBuiltinFormat((short)formatIndex);
    	}
		return format;
}

Returns the format string, eg $##.##, for the given number format index.

 public String getFormatString(CellValueRecordInterface cell) 
{
		int formatIndex = getFormatIndex(cell);
	    if(formatIndex == -1) {
	    	// Not found
	    	return null;
	    }
	    return getFormatString(formatIndex);
}

Returns the format string, eg $##.##, used by your cell

 public  void processRecord(Record record) 
{
		// Handle it ourselves
		processRecordInternally(record);
		// Now pass on to our child
		childListener.processRecord(record);
}

Process this record ourselves, and then pass it on to our child listener

 public  void processRecordInternally(Record record) 
{
		if(record instanceof FormatRecord) {
			FormatRecord fr = (FormatRecord) record;
			customFormatRecords.put(new Integer(fr.getIndexCode()), fr);
		}
		if(record instanceof ExtendedFormatRecord) {
			ExtendedFormatRecord xr = (ExtendedFormatRecord) record;
			xfRecords.add(xr);
		}
}

Process the record ourselves, but do not pass it on to the child Listener.