Examples with RecodeAgent org.apache.sysml.runtime.transform.RecodeAgent used on opensource projects

Example 1 with RecodeAgent

use of org.apache.sysml.runtime.transform.RecodeAgent in project incubator-systemml by apache.

the class EncoderFactory method createEncoder.

@SuppressWarnings("unchecked")
public static Encoder createEncoder(String spec, String[] colnames, ValueType[] schema, FrameBlock meta) throws DMLRuntimeException {
    Encoder encoder = null;
    int clen = schema.length;
    try {
        //parse transform specification
        JSONObject jSpec = new JSONObject(spec);
        List<Encoder> lencoders = new ArrayList<Encoder>();
        //prepare basic id lists (recode, dummycode, pass-through)
        //note: any dummycode column requires recode as preparation
        List<Integer> rcIDs = Arrays.asList(ArrayUtils.toObject(TfMetaUtils.parseJsonIDList(jSpec, colnames, TfUtils.TXMETHOD_RECODE)));
        List<Integer> dcIDs = Arrays.asList(ArrayUtils.toObject(TfMetaUtils.parseJsonIDList(jSpec, colnames, TfUtils.TXMETHOD_DUMMYCODE)));
        rcIDs = new ArrayList<Integer>(CollectionUtils.union(rcIDs, dcIDs));
        List<Integer> binIDs = TfMetaUtils.parseBinningColIDs(jSpec, colnames);
        List<Integer> ptIDs = new ArrayList<Integer>(CollectionUtils.subtract(CollectionUtils.subtract(UtilFunctions.getSequenceList(1, clen, 1), rcIDs), binIDs));
        List<Integer> oIDs = Arrays.asList(ArrayUtils.toObject(TfMetaUtils.parseJsonIDList(jSpec, colnames, TfUtils.TXMETHOD_OMIT)));
        List<Integer> mvIDs = Arrays.asList(ArrayUtils.toObject(TfMetaUtils.parseJsonObjectIDList(jSpec, colnames, TfUtils.TXMETHOD_IMPUTE)));
        //create individual encoders
        if (!rcIDs.isEmpty()) {
            RecodeAgent ra = new RecodeAgent(jSpec, colnames, clen);
            ra.setColList(ArrayUtils.toPrimitive(rcIDs.toArray(new Integer[0])));
            lencoders.add(ra);
        }
        if (!ptIDs.isEmpty())
            lencoders.add(new EncoderPassThrough(ArrayUtils.toPrimitive(ptIDs.toArray(new Integer[0])), clen));
        if (!dcIDs.isEmpty())
            lencoders.add(new DummycodeAgent(jSpec, colnames, schema.length));
        if (!binIDs.isEmpty())
            lencoders.add(new BinAgent(jSpec, colnames, schema.length, true));
        if (!oIDs.isEmpty())
            lencoders.add(new OmitAgent(jSpec, colnames, schema.length));
        if (!mvIDs.isEmpty()) {
            MVImputeAgent ma = new MVImputeAgent(jSpec, colnames, schema.length);
            ma.initRecodeIDList(rcIDs);
            lencoders.add(ma);
        }
        //create composite decoder of all created encoders
        //and initialize meta data (recode, dummy, bin, mv)
        encoder = new EncoderComposite(lencoders);
        if (meta != null)
            encoder.initMetaData(meta);
    } catch (Exception ex) {
        throw new DMLRuntimeException(ex);
    }
    return encoder;
}