private void writeColumns(DataPointsRowKey rowKey, List<HColumn<Integer, ByteBuffer>> columns) throws IOException { if (columns.size() != 0) { Map<String, String> tags = rowKey.getTags(); m_queryCallback.startDataPointSet(tags); for (HColumn<Integer, ByteBuffer> column : columns) { int columnTime = column.getName(); ByteBuffer value = column.getValue(); if (isLongValue(columnTime)) { m_queryCallback.addDataPoint( getColumnTimestamp(rowKey.getTimestamp(), columnTime), ValueSerializer.getLongFromByteBuffer(value)); } else { m_queryCallback.addDataPoint( getColumnTimestamp(rowKey.getTimestamp(), columnTime), ValueSerializer.getDoubleFromByteBuffer(value)); } } } }