| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| import java.io.IOException; |
| |
| import edu.uci.ics.asterix.builders.IAOrderedListBuilder; |
| import edu.uci.ics.asterix.builders.OrderedListBuilder; |
| import edu.uci.ics.asterix.common.functions.FunctionConstants; |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.om.base.ABoolean; |
| import edu.uci.ics.asterix.om.base.AFloat; |
| import edu.uci.ics.asterix.om.base.AMutableFloat; |
| import edu.uci.ics.asterix.om.functions.IFunctionDescriptor; |
| import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory; |
| import edu.uci.ics.asterix.om.types.AOrderedListType; |
| import edu.uci.ics.asterix.om.types.BuiltinType; |
| import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import edu.uci.ics.asterix.runtime.evaluators.common.SimilarityJaccardPrefixEvaluator; |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| 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.dataflow.common.data.accessors.ArrayBackedValueStorage; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IDataOutputProvider; |
| |
| public class SimilarityJaccardPrefixCheckDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, |
| "similarity-jaccard-prefix-check", 6, true); |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new SimilarityJaccardPrefixCheckDescriptor(); |
| } |
| }; |
| |
| @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 { |
| return new SimilarityJaccardPrefixCheckEvaluator(args, output); |
| } |
| }; |
| } |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| private static class SimilarityJaccardPrefixCheckEvaluator extends SimilarityJaccardPrefixEvaluator { |
| |
| private final IAOrderedListBuilder listBuilder; |
| private ArrayBackedValueStorage inputVal; |
| @SuppressWarnings("unchecked") |
| private final ISerializerDeserializer<ABoolean> booleanSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ABOOLEAN); |
| @SuppressWarnings("unchecked") |
| private final ISerializerDeserializer<AFloat> floatSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AFLOAT); |
| private final AMutableFloat aFloat = new AMutableFloat(0); |
| |
| private final AOrderedListType listType = new AOrderedListType(BuiltinType.ANY, "list"); |
| |
| public SimilarityJaccardPrefixCheckEvaluator(ICopyEvaluatorFactory[] args, IDataOutputProvider output) |
| throws AlgebricksException { |
| super(args, output); |
| listBuilder = new OrderedListBuilder(); |
| inputVal = new ArrayBackedValueStorage(); |
| } |
| |
| @Override |
| public void writeResult() throws AlgebricksException, IOException { |
| listBuilder.reset(listType); |
| boolean matches = (sim <= 0) ? false : true; |
| float jaccSim = (matches) ? sim : 0.0f; |
| |
| inputVal.reset(); |
| booleanSerde.serialize(matches ? ABoolean.TRUE : ABoolean.FALSE, inputVal.getDataOutput()); |
| listBuilder.addItem(inputVal); |
| |
| inputVal.reset(); |
| aFloat.setValue(jaccSim); |
| floatSerde.serialize(aFloat, inputVal.getDataOutput()); |
| listBuilder.addItem(inputVal); |
| |
| listBuilder.write(out, true); |
| |
| } |
| } |
| |
| } |