| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import edu.uci.ics.asterix.common.exceptions.AsterixException; |
| import edu.uci.ics.asterix.common.functions.FunctionConstants; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AOrderedListSerializerDeserializer; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AUnorderedListSerializerDeserializer; |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.om.base.ADouble; |
| import edu.uci.ics.asterix.om.base.AMutableDouble; |
| import edu.uci.ics.asterix.om.types.ATypeTag; |
| import edu.uci.ics.asterix.om.types.BuiltinType; |
| import edu.uci.ics.asterix.om.types.EnumDeserializer; |
| import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import edu.uci.ics.asterix.runtime.evaluators.common.SimilarityFiltersCache; |
| import edu.uci.ics.fuzzyjoin.IntArray; |
| import edu.uci.ics.fuzzyjoin.similarity.PartialIntersect; |
| import edu.uci.ics.fuzzyjoin.similarity.SimilarityFilters; |
| import edu.uci.ics.fuzzyjoin.similarity.SimilarityMetric; |
| 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.IEvaluator; |
| import edu.uci.ics.hyracks.algebricks.runtime.base.IEvaluatorFactory; |
| 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; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| import edu.uci.ics.hyracks.dataflow.common.data.marshalling.IntegerSerializerDeserializer; |
| |
| public class SimilarityDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| private final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "similarity", 7, |
| true); |
| |
| private final static byte SER_ORDEREDLIST_TYPE_TAG = ATypeTag.ORDEREDLIST.serialize(); |
| private final static byte SER_UNORDEREDLIST_TYPE_TAG = ATypeTag.UNORDEREDLIST.serialize(); |
| |
| @Override |
| public IEvaluatorFactory createEvaluatorFactory(final IEvaluatorFactory[] args) throws AlgebricksException { |
| |
| return new IEvaluatorFactory() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public IEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException { |
| |
| return new IEvaluator() { |
| |
| private final DataOutput out = output.getDataOutput(); |
| private final ArrayBackedValueStorage inputVal = new ArrayBackedValueStorage(); |
| private final IEvaluator evalLen1 = args[0].createEvaluator(inputVal); |
| private final IEvaluator evalTokens1 = args[1].createEvaluator(inputVal); |
| private final IEvaluator evalLen2 = args[2].createEvaluator(inputVal); |
| private final IEvaluator evalTokens2 = args[3].createEvaluator(inputVal); |
| private final IEvaluator evalTokenPrefix = args[4].createEvaluator(inputVal); |
| private final IEvaluator evalSimilarity = args[5].createEvaluator(inputVal); |
| private final IEvaluator evalThreshold = args[6].createEvaluator(inputVal); |
| |
| private final SimilarityFiltersCache similarityFiltersCache = new SimilarityFiltersCache(); |
| |
| private final IntArray tokens1 = new IntArray(); |
| private final IntArray tokens2 = new IntArray(); |
| private final PartialIntersect parInter = new PartialIntersect(); |
| |
| // result |
| private final AMutableDouble res = new AMutableDouble(0); |
| @SuppressWarnings("unchecked") |
| private final ISerializerDeserializer<ADouble> doubleSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ADOUBLE); |
| |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| // similarity threshold |
| inputVal.reset(); |
| evalThreshold.evaluate(tuple); |
| float similarityThreshold = (float) ADoubleSerializerDeserializer.getDouble( |
| inputVal.getBytes(), 1); |
| |
| // similarity name |
| inputVal.reset(); |
| evalSimilarity.evaluate(tuple); |
| SimilarityFilters similarityFilters = similarityFiltersCache.get(similarityThreshold, |
| inputVal.getBytes()); |
| |
| inputVal.reset(); |
| evalLen1.evaluate(tuple); |
| int length1 = IntegerSerializerDeserializer.getInt(inputVal.getBytes(), 1); |
| |
| inputVal.reset(); |
| evalLen2.evaluate(tuple); |
| int length2 = IntegerSerializerDeserializer.getInt(inputVal.getBytes(), 1); |
| |
| float sim = 0; |
| |
| // |
| // -- - length filter - -- |
| // |
| if (similarityFilters.passLengthFilter(length1, length2)) { |
| |
| // -- - tokens1 - -- |
| int i; |
| tokens1.reset(); |
| inputVal.reset(); |
| evalTokens1.evaluate(tuple); |
| |
| byte[] serList = inputVal.getBytes(); |
| if (serList[0] != SER_ORDEREDLIST_TYPE_TAG && serList[0] != SER_UNORDEREDLIST_TYPE_TAG) { |
| throw new AlgebricksException("Scan collection is not defined for values of type" |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serList[0])); |
| } |
| |
| int lengthTokens1; |
| if (serList[0] == SER_ORDEREDLIST_TYPE_TAG) { |
| lengthTokens1 = AOrderedListSerializerDeserializer |
| .getNumberOfItems(inputVal.getBytes()); |
| // read tokens |
| for (i = 0; i < lengthTokens1; i++) { |
| int itemOffset; |
| try { |
| itemOffset = AOrderedListSerializerDeserializer.getItemOffset(serList, i); |
| } catch (AsterixException e) { |
| throw new AlgebricksException(e); |
| } |
| tokens1.add(IntegerSerializerDeserializer.getInt(serList, itemOffset)); |
| } |
| } else { |
| lengthTokens1 = AUnorderedListSerializerDeserializer.getNumberOfItems(inputVal |
| .getBytes()); |
| // read tokens |
| for (i = 0; i < lengthTokens1; i++) { |
| int itemOffset; |
| try { |
| itemOffset = AUnorderedListSerializerDeserializer.getItemOffset(serList, i); |
| } catch (AsterixException e) { |
| throw new AlgebricksException(e); |
| } |
| tokens1.add(IntegerSerializerDeserializer.getInt(serList, itemOffset)); |
| } |
| } |
| // pad tokens |
| for (; i < length1; i++) { |
| tokens1.add(Integer.MAX_VALUE); |
| } |
| |
| // -- - tokens2 - -- |
| tokens2.reset(); |
| inputVal.reset(); |
| evalTokens2.evaluate(tuple); |
| |
| serList = inputVal.getBytes(); |
| if (serList[0] != SER_ORDEREDLIST_TYPE_TAG && serList[0] != SER_UNORDEREDLIST_TYPE_TAG) { |
| throw new AlgebricksException("Scan collection is not defined for values of type" |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serList[0])); |
| } |
| |
| int lengthTokens2; |
| if (serList[0] == SER_ORDEREDLIST_TYPE_TAG) { |
| lengthTokens2 = AOrderedListSerializerDeserializer |
| .getNumberOfItems(inputVal.getBytes()); |
| // read tokens |
| for (i = 0; i < lengthTokens2; i++) { |
| int itemOffset; |
| try { |
| itemOffset = AOrderedListSerializerDeserializer.getItemOffset(serList, i); |
| } catch (AsterixException e) { |
| throw new AlgebricksException(e); |
| } |
| tokens2.add(IntegerSerializerDeserializer.getInt(serList, itemOffset)); |
| } |
| } else { |
| lengthTokens2 = AUnorderedListSerializerDeserializer.getNumberOfItems(inputVal |
| .getBytes()); |
| // read tokens |
| for (i = 0; i < lengthTokens2; i++) { |
| int itemOffset; |
| try { |
| itemOffset = AUnorderedListSerializerDeserializer.getItemOffset(serList, i); |
| } catch (AsterixException e) { |
| throw new AlgebricksException(e); |
| } |
| tokens2.add(IntegerSerializerDeserializer.getInt(serList, itemOffset)); |
| } |
| } |
| // pad tokens |
| for (; i < length2; i++) { |
| tokens2.add(Integer.MAX_VALUE); |
| } |
| |
| // -- - token prefix - -- |
| inputVal.reset(); |
| evalTokenPrefix.evaluate(tuple); |
| int tokenPrefix = IntegerSerializerDeserializer.getInt(inputVal.getBytes(), 1); |
| |
| // |
| // -- - position filter - -- |
| // |
| SimilarityMetric.getPartialIntersectSize(tokens1.get(), 0, tokens1.length(), tokens2.get(), |
| 0, tokens2.length(), tokenPrefix, parInter); |
| if (similarityFilters.passPositionFilter(parInter.intersectSize, parInter.posXStop, |
| length1, parInter.posYStop, length2)) { |
| |
| // |
| // -- - suffix filter - -- |
| // |
| if (similarityFilters.passSuffixFilter(tokens1.get(), 0, tokens1.length(), |
| parInter.posXStart, tokens2.get(), 0, tokens2.length(), parInter.posYStart)) { |
| |
| sim = similarityFilters.passSimilarityFilter(tokens1.get(), 0, tokens1.length(), |
| parInter.posXStop + 1, tokens2.get(), 0, tokens2.length(), |
| parInter.posYStop + 1, parInter.intersectSize); |
| } |
| } |
| } |
| |
| res.setValue(sim); |
| |
| try { |
| doubleSerde.serialize(res, out); |
| } catch (IOException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| }; |
| } |
| }; |
| } |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| } |
