BitmapAgg myagg = (BitmapAgg) agg;
ArrayList<LongWritable> partialResult = (ArrayList<LongWritable>) internalMergeOI.getList(partial);
BitmapObjectInput bitmapObjIn = new BitmapObjectInput(partialResult);
EWAHCompressedBitmap partialBitmap = new EWAHCompressedBitmap();
try {
partialBitmap.readExternal(bitmapObjIn);
} catch (IOException e) {
throw new RuntimeException(e);
}
myagg.bitmap = myagg.bitmap.or(partialBitmap);
}