hivesterix/src/main/java/edu/uci/ics/hivesterix/runtime/factory/hashfunction/HiveDoubleBinaryHashFunctionFactory.java

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

import edu.uci.ics.hivesterix.serde.lazy.LazyUtils;
import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunction;
import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;

public class HiveDoubleBinaryHashFunctionFactory implements
		IBinaryHashFunctionFactory {
	private static final long serialVersionUID = 1L;

	public static HiveDoubleBinaryHashFunctionFactory INSTANCE = new HiveDoubleBinaryHashFunctionFactory();

	private HiveDoubleBinaryHashFunctionFactory() {
	}

	@Override
	public IBinaryHashFunction createBinaryHashFunction() {
		// TODO Auto-generated method stub
		return new IBinaryHashFunction() {
			private Double value;

			@Override
			public int hash(byte[] bytes, int offset, int length) {
				value = Double.longBitsToDouble(LazyUtils.byteArrayToLong(
						bytes, offset));
				return value.hashCode();
			}
		};
	}

}