package edu.uci.ics.pregelix.runtime.touchpoint;

import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputer;
import edu.uci.ics.hyracks.api.dataflow.value.INormalizedKeyComputerFactory;

public class VLongDescNormalizedKeyComputerFactory implements INormalizedKeyComputerFactory {
    private static final long serialVersionUID = 1L;
    private final INormalizedKeyComputerFactory ascNormalizedKeyComputerFactory = new VLongAscNormalizedKeyComputerFactory();

    @Override
    public INormalizedKeyComputer createNormalizedKeyComputer() {
        return new INormalizedKeyComputer() {
            private INormalizedKeyComputer nmkComputer = ascNormalizedKeyComputerFactory.createNormalizedKeyComputer();

            @Override
            public int normalize(byte[] bytes, int start, int length) {
                int nk = nmkComputer.normalize(bytes, start, length);
                return (int) ((long) Integer.MAX_VALUE - (long) (nk - Integer.MIN_VALUE));
            }

        };
    }
}