public int compare(DatanodeDescriptor d1, DatanodeDescriptor d2) { int ret = 0; switch (sortField) { case FIELD_LAST_CONTACT: ret = (int) (d2.getLastUpdate() - d1.getLastUpdate()); break; case FIELD_CAPACITY: long dlong = d1.getCapacity() - d2.getCapacity(); ret = (dlong < 0) ? -1 : ((dlong > 0) ? 1 : 0); break; case FIELD_USED: dlong = d1.getDfsUsed() - d2.getDfsUsed(); ret = (dlong < 0) ? -1 : ((dlong > 0) ? 1 : 0); break; case FIELD_NONDFS_USED: dlong = d1.getNonDfsUsed() - d2.getNonDfsUsed(); ret = (dlong < 0) ? -1 : ((dlong > 0) ? 1 : 0); break; case FIELD_REMAINING: dlong = d1.getRemaining() - d2.getRemaining(); ret = (dlong < 0) ? -1 : ((dlong > 0) ? 1 : 0); break; case FIELD_PERCENT_USED: double ddbl = ((d1.getDfsUsedPercent()) - (d2.getDfsUsedPercent())); ret = (ddbl < 0) ? -1 : ((ddbl > 0) ? 1 : 0); break; case FIELD_PERCENT_REMAINING: ddbl = ((d1.getRemainingPercent()) - (d2.getRemainingPercent())); ret = (ddbl < 0) ? -1 : ((ddbl > 0) ? 1 : 0); break; case FIELD_BLOCKS: ret = d1.numBlocks() - d2.numBlocks(); break; case FIELD_NAME: ret = d1.getHostName().compareTo(d2.getHostName()); break; } return (sortOrder == SORT_ORDER_DSC) ? -ret : ret; }