| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| import java.io.DataOutput; |
| |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ABooleanSerializerDeserializer; |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.om.base.ABoolean; |
| import edu.uci.ics.asterix.om.base.ANull; |
| import edu.uci.ics.asterix.om.functions.IFunctionDescriptor; |
| import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory; |
| import edu.uci.ics.asterix.om.types.ATypeTag; |
| import edu.uci.ics.asterix.om.types.BuiltinType; |
| import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.functions.AlgebricksBuiltinFunctions; |
| import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory; |
| import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.ArrayBackedValueStorage; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IDataOutputProvider; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public class NotDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| public final static FunctionIdentifier FID = new FunctionIdentifier(AlgebricksBuiltinFunctions.ALGEBRICKS_NS, |
| "not", 1, true); |
| |
| private final static byte SER_BOOLEAN_TYPE_TAG = ATypeTag.BOOLEAN.serialize(); |
| private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize(); |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new NotDescriptor(); |
| } |
| }; |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| @Override |
| public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException { |
| return new ICopyEvaluatorFactory() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public ICopyEvaluator createEvaluator(IDataOutputProvider output) throws AlgebricksException { |
| final DataOutput out = output.getDataOutput(); |
| |
| return new ICopyEvaluator() { |
| |
| private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage(); |
| private ICopyEvaluator eval = args[0].createEvaluator(argOut); |
| |
| private String errorMessage = "Not() can only be applied on boolean"; |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ABoolean> booleanSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ABOOLEAN); |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ANULL); |
| |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| argOut.reset(); |
| eval.evaluate(tuple); |
| try { |
| if (argOut.getByteArray()[0] == SER_BOOLEAN_TYPE_TAG) { |
| boolean argRes = ABooleanSerializerDeserializer.getBoolean(argOut.getByteArray(), 1); |
| ABoolean aResult = argRes ? (ABoolean.FALSE) : (ABoolean.TRUE); |
| booleanSerde.serialize(aResult, out); |
| } else if (argOut.getByteArray()[0] == SER_NULL_TYPE_TAG) |
| nullSerde.serialize(ANull.NULL, out); |
| else |
| throw new AlgebricksException(errorMessage); |
| } catch (HyracksDataException hde) { |
| throw new AlgebricksException(hde); |
| } |
| } |
| }; |
| } |
| }; |
| } |
| |
| } |