| 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.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.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.om.types.EnumDeserializer; |
| import edu.uci.ics.asterix.om.util.NonTaggedFormatUtil; |
| 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.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; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public class AnyCollectionMemberDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| private final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, |
| "any-collection-member", 1); |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new AnyCollectionMemberDescriptor(); |
| } |
| }; |
| |
| @Override |
| public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) { |
| return new AnyCollectionMemberEvalFactory(args[0]); |
| } |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| private static class AnyCollectionMemberEvalFactory implements ICopyEvaluatorFactory { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private ICopyEvaluatorFactory listEvalFactory; |
| private final static byte SER_ORDEREDLIST_TYPE_TAG = ATypeTag.ORDEREDLIST.serialize(); |
| private final static byte SER_UNORDEREDLIST_TYPE_TAG = ATypeTag.UNORDEREDLIST.serialize(); |
| private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize(); |
| private byte serItemTypeTag; |
| private ATypeTag itemTag; |
| private boolean selfDescList = false; |
| |
| public AnyCollectionMemberEvalFactory(ICopyEvaluatorFactory arg) { |
| this.listEvalFactory = arg; |
| } |
| |
| @Override |
| public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException { |
| return new ICopyEvaluator() { |
| |
| private DataOutput out = output.getDataOutput(); |
| private ArrayBackedValueStorage outInputList = new ArrayBackedValueStorage(); |
| private ICopyEvaluator evalList = listEvalFactory.createEvaluator(outInputList); |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ANULL); |
| private int itemOffset; |
| private int itemLength; |
| |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| |
| try { |
| outInputList.reset(); |
| evalList.evaluate(tuple); |
| byte[] serList = outInputList.getByteArray(); |
| |
| if (serList[0] == SER_NULL_TYPE_TAG) { |
| nullSerde.serialize(ANull.NULL, out); |
| return; |
| } |
| |
| if (serList[0] != SER_ORDEREDLIST_TYPE_TAG && serList[0] != SER_UNORDEREDLIST_TYPE_TAG) { |
| throw new AlgebricksException("List's get-any-item is not defined for values of type" |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serList[0])); |
| } |
| |
| if (serList[0] == SER_ORDEREDLIST_TYPE_TAG) { |
| if (AOrderedListSerializerDeserializer.getNumberOfItems(serList) == 0) { |
| out.writeByte(SER_NULL_TYPE_TAG); |
| return; |
| } |
| itemOffset = AOrderedListSerializerDeserializer.getItemOffset(serList, 0); |
| } else { |
| if (AUnorderedListSerializerDeserializer.getNumberOfItems(serList) == 0) { |
| out.writeByte(SER_NULL_TYPE_TAG); |
| return; |
| } |
| itemOffset = AUnorderedListSerializerDeserializer.getItemOffset(serList, 0); |
| } |
| |
| itemTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serList[1]); |
| if (itemTag == ATypeTag.ANY) |
| selfDescList = true; |
| else |
| serItemTypeTag = serList[1]; |
| |
| if (selfDescList) { |
| itemTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serList[itemOffset]); |
| itemLength = NonTaggedFormatUtil.getFieldValueLength(serList, itemOffset, itemTag, true) + 1; |
| out.write(serList, itemOffset, itemLength); |
| } else { |
| itemLength = NonTaggedFormatUtil.getFieldValueLength(serList, itemOffset, itemTag, false); |
| out.writeByte(serItemTypeTag); |
| out.write(serList, itemOffset, itemLength); |
| } |
| } catch (IOException e) { |
| throw new AlgebricksException(e); |
| } catch (AsterixException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| }; |
| } |
| |
| } |
| |
| } |