package edu.uci.ics.hivesterix.runtime.factory.normalize;

import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputer;
import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputerFactory;

public class HiveDoubleAscNormalizedKeyComputerFactory implements INormalizedKeyComputerFactory {

    private static final long serialVersionUID = 1L;

    @Override
    public INormalizedKeyComputer createNormalizedKeyComputer() {

        return new INormalizedKeyComputer() {

            @Override
            public int normalize(byte[] bytes, int start, int length) {
                int header = LazyUtils.byteArrayToInt(bytes, start);
                long unsignedValue = (long) header;
                return (int) ((unsignedValue - ((long) Integer.MIN_VALUE)) & 0xffffffffL);
            }
        };
    }
}