| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| 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.data.std.api.IDataOutputProvider; |
| import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public class OrDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| public final static FunctionIdentifier FID = new FunctionIdentifier(AlgebricksBuiltinFunctions.ALGEBRICKS_NS, "or", |
| FunctionIdentifier.VARARGS); |
| private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize(); |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new OrDescriptor(); |
| } |
| }; |
| |
| @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(final IDataOutputProvider output) throws AlgebricksException { |
| // one temp. buffer re-used by all children |
| final ArrayBackedValueStorage argOut = new ArrayBackedValueStorage(); |
| final ICopyEvaluator[] evals = new ICopyEvaluator[args.length]; |
| for (int i = 0; i < evals.length; i++) { |
| evals[i] = args[i].createEvaluator(argOut); |
| } |
| |
| return new ICopyEvaluator() { |
| @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 { |
| try { |
| int n = args.length; |
| boolean res = false; |
| boolean metNull = false; |
| for (int i = 0; i < n; i++) { |
| argOut.reset(); |
| evals[i].evaluate(tuple); |
| if (argOut.getByteArray()[0] == SER_NULL_TYPE_TAG) { |
| metNull = true; |
| continue; |
| } |
| boolean argResult = ABooleanSerializerDeserializer.getBoolean(argOut.getByteArray(), 1); |
| if (argResult == true) { |
| res = true; |
| break; |
| } |
| } |
| if (metNull) { |
| if (!res) { |
| ABoolean aResult = ABoolean.FALSE; |
| booleanSerde.serialize(aResult, output.getDataOutput()); |
| } else |
| nullSerde.serialize(ANull.NULL, output.getDataOutput()); |
| } else { |
| ABoolean aResult = res ? (ABoolean.TRUE) : (ABoolean.FALSE); |
| booleanSerde.serialize(aResult, output.getDataOutput()); |
| } |
| } catch (HyracksDataException hde) { |
| throw new AlgebricksException(hde); |
| } |
| } |
| }; |
| } |
| }; |
| } |
| |
| } |