| /* |
| * Numeric function Round half to even |
| * Author : Xiaoyu Ma@UC Irvine |
| * 01/30/2012 |
| */ |
| package edu.uci.ics.asterix.runtime.evaluators.functions; |
| |
| import java.io.DataOutput; |
| import java.math.BigDecimal; |
| |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AFloatSerializerDeserializer; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt16SerializerDeserializer; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt8SerializerDeserializer; |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.om.base.AMutableDouble; |
| import edu.uci.ics.asterix.om.base.AMutableFloat; |
| import edu.uci.ics.asterix.om.base.AMutableInt16; |
| import edu.uci.ics.asterix.om.base.AMutableInt32; |
| import edu.uci.ics.asterix.om.base.AMutableInt64; |
| import edu.uci.ics.asterix.om.base.AMutableInt8; |
| import edu.uci.ics.asterix.om.base.ANull; |
| import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions; |
| 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.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException; |
| 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 NumericRoundHalfToEven2Descriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new NumericRoundHalfToEven2Descriptor(); |
| } |
| }; |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return AsterixBuiltinFunctions.NUMERIC_ROUND_HALF_TO_EVEN2; |
| } |
| |
| @Override |
| public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) { |
| return new ICopyEvaluatorFactory() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException { |
| |
| return new ICopyEvaluator() { |
| |
| private DataOutput out = output.getDataOutput(); |
| private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage(); |
| private ICopyEvaluator eval = args[0].createEvaluator(argOut); |
| private ICopyEvaluator precision = args[1].createEvaluator(argOut); |
| |
| private byte serNullTypeTag = ATypeTag.NULL.serialize(); |
| private byte serInt8TypeTag = ATypeTag.INT8.serialize(); |
| private byte serInt16TypeTag = ATypeTag.INT16.serialize(); |
| private byte serInt32TypeTag = ATypeTag.INT32.serialize(); |
| private byte serInt64TypeTag = ATypeTag.INT64.serialize(); |
| private byte serFloatTypeTag = ATypeTag.FLOAT.serialize(); |
| private byte serDoubleTypeTag = ATypeTag.DOUBLE.serialize(); |
| |
| private AMutableDouble aDouble = new AMutableDouble(0); |
| private AMutableFloat aFloat = new AMutableFloat(0); |
| private AMutableInt64 aInt64 = new AMutableInt64(0); |
| private AMutableInt32 aInt32 = new AMutableInt32(0); |
| private AMutableInt16 aInt16 = new AMutableInt16((short) 0); |
| private AMutableInt8 aInt8 = new AMutableInt8((byte) 0); |
| @SuppressWarnings("rawtypes") |
| private ISerializerDeserializer serde; |
| |
| private int getPrecision(IFrameTupleReference tuple) throws AlgebricksException { |
| argOut.reset(); |
| precision.evaluate(tuple); |
| |
| if (argOut.getByteArray()[0] == serInt8TypeTag) { |
| return (int) AInt8SerializerDeserializer.getByte(argOut.getByteArray(), 1); |
| } else if (argOut.getByteArray()[0] == serInt16TypeTag) { |
| return (int) AInt16SerializerDeserializer.getShort(argOut.getByteArray(), 1); |
| } else if (argOut.getByteArray()[0] == serInt32TypeTag) { |
| return (int) AInt32SerializerDeserializer.getInt(argOut.getByteArray(), 1); |
| } else if (argOut.getByteArray()[0] == serInt64TypeTag) { |
| return (int) AInt64SerializerDeserializer.getLong(argOut.getByteArray(), 1); |
| } else if (argOut.getByteArray()[0] == serFloatTypeTag) { |
| return (int) AFloatSerializerDeserializer.getFloat(argOut.getByteArray(), 1); |
| } else if (argOut.getByteArray()[0] == serDoubleTypeTag) { |
| return (int) ADoubleSerializerDeserializer.getDouble(argOut.getByteArray(), 1); |
| } |
| |
| return 0; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| argOut.reset(); |
| eval.evaluate(tuple); |
| |
| try { |
| if (argOut.getByteArray()[0] == serNullTypeTag) { |
| serde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ANULL); |
| serde.serialize(ANull.NULL, out); |
| } else if (argOut.getByteArray()[0] == serInt8TypeTag) { |
| serde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT8); |
| byte val = (byte) AInt8SerializerDeserializer.getByte(argOut.getByteArray(), 1); |
| aInt8.setValue(val); |
| serde.serialize(aInt8, out); |
| } else if (argOut.getByteArray()[0] == serInt16TypeTag) { |
| serde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT16); |
| short val = (short) AInt16SerializerDeserializer.getShort(argOut.getByteArray(), 1); |
| aInt16.setValue(val); |
| serde.serialize(aInt16, out); |
| } else if (argOut.getByteArray()[0] == serInt32TypeTag) { |
| serde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT32); |
| int val = (int) AInt32SerializerDeserializer.getInt(argOut.getByteArray(), 1); |
| aInt32.setValue(val); |
| serde.serialize(aInt32, out); |
| } else if (argOut.getByteArray()[0] == serInt64TypeTag) { |
| serde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT64); |
| long val = (long) AInt64SerializerDeserializer.getLong(argOut.getByteArray(), 1); |
| aInt64.setValue(val); |
| serde.serialize(aInt64, out); |
| } else if (argOut.getByteArray()[0] == serFloatTypeTag) { |
| serde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AFLOAT); |
| float val = (float) AFloatSerializerDeserializer.getFloat(argOut.getByteArray(), 1); |
| if (Float.isNaN(val) || Float.isInfinite(val) || val == -0.0F || val == 0.0F) { |
| aFloat.setValue(val); |
| serde.serialize(aFloat, out); |
| } else { |
| BigDecimal r = new BigDecimal(Float.toString(val)); |
| aFloat.setValue(r.setScale(getPrecision(tuple), BigDecimal.ROUND_HALF_EVEN) |
| .floatValue()); |
| serde.serialize(aFloat, out); |
| } |
| } else if (argOut.getByteArray()[0] == serDoubleTypeTag) { |
| serde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ADOUBLE); |
| double val = (double) ADoubleSerializerDeserializer.getDouble(argOut.getByteArray(), 1); |
| if (Double.isNaN(val) || Double.isInfinite(val) || val == -0.0D || val == 0.0D) { |
| aDouble.setValue(val); |
| serde.serialize(aDouble, out); |
| } else { |
| BigDecimal r = new BigDecimal(Double.toString(val)); |
| aDouble.setValue(r.setScale(getPrecision(tuple), BigDecimal.ROUND_HALF_EVEN) |
| .doubleValue()); |
| serde.serialize(aDouble, out); |
| } |
| } else { |
| throw new NotImplementedException("Numeric Round Half to Even is not implemented for " |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(argOut.getByteArray()[0])); |
| } |
| } catch (HyracksDataException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| }; |
| } |
| }; |
| } |
| |
| } |
