package edu.uci.ics.hivesterix.runtime.factory.hashfunction; | |
import edu.uci.ics.hivesterix.serde.lazy.LazyUtils; | |
import edu.uci.ics.hivesterix.serde.lazy.LazyUtils.VInt; | |
import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunction; | |
import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory; | |
public class HiveIntegerBinaryHashFunctionFactory implements IBinaryHashFunctionFactory { | |
private static final long serialVersionUID = 1L; | |
public static IBinaryHashFunctionFactory INSTANCE = new HiveIntegerBinaryHashFunctionFactory(); | |
private HiveIntegerBinaryHashFunctionFactory() { | |
} | |
@Override | |
public IBinaryHashFunction createBinaryHashFunction() { | |
return new IBinaryHashFunction() { | |
private VInt value = new VInt(); | |
@Override | |
public int hash(byte[] bytes, int offset, int length) { | |
LazyUtils.readVInt(bytes, offset, value); | |
if (value.length != length) | |
throw new IllegalArgumentException("length mismatch in int hash function actual: " + length | |
+ " expected " + value.length); | |
return value.value; | |
} | |
}; | |
} | |
} |