| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| /* |
| * Numeric function Round half to even |
| * Author : Xiaoyu Ma@UC Irvine |
| * 01/30/2012 |
| */ |
| package org.apache.asterix.runtime.evaluators.functions; |
| |
| import java.io.DataOutput; |
| import java.math.BigDecimal; |
| |
| import org.apache.asterix.common.annotations.MissingNullInOutFunction; |
| import org.apache.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer; |
| import org.apache.asterix.dataflow.data.nontagged.serde.AFloatSerializerDeserializer; |
| import org.apache.asterix.dataflow.data.nontagged.serde.AInt16SerializerDeserializer; |
| import org.apache.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer; |
| import org.apache.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer; |
| import org.apache.asterix.dataflow.data.nontagged.serde.AInt8SerializerDeserializer; |
| import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider; |
| import org.apache.asterix.om.base.AMutableDouble; |
| import org.apache.asterix.om.base.AMutableFloat; |
| import org.apache.asterix.om.base.AMutableInt16; |
| import org.apache.asterix.om.base.AMutableInt32; |
| import org.apache.asterix.om.base.AMutableInt64; |
| import org.apache.asterix.om.base.AMutableInt8; |
| import org.apache.asterix.om.functions.BuiltinFunctions; |
| import org.apache.asterix.om.functions.IFunctionDescriptor; |
| import org.apache.asterix.om.functions.IFunctionDescriptorFactory; |
| import org.apache.asterix.om.types.ATypeTag; |
| import org.apache.asterix.om.types.BuiltinType; |
| import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import org.apache.asterix.runtime.exceptions.TypeMismatchException; |
| import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; |
| import org.apache.hyracks.algebricks.runtime.base.IEvaluatorContext; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory; |
| import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.VoidPointable; |
| import org.apache.hyracks.data.std.util.ArrayBackedValueStorage; |
| import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| @MissingNullInOutFunction |
| public class NumericRoundHalfToEven2Descriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| @Override |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new NumericRoundHalfToEven2Descriptor(); |
| } |
| }; |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return BuiltinFunctions.NUMERIC_ROUND_HALF_TO_EVEN2; |
| } |
| |
| @Override |
| public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) { |
| return new IScalarEvaluatorFactory() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public IScalarEvaluator createScalarEvaluator(final IEvaluatorContext ctx) throws HyracksDataException { |
| |
| return new IScalarEvaluator() { |
| |
| private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage(); |
| private DataOutput out = resultStorage.getDataOutput(); |
| private IPointable argValue = new VoidPointable(); |
| private IPointable argPrecision = new VoidPointable(); |
| private IScalarEvaluator eval = args[0].createScalarEvaluator(ctx); |
| private IScalarEvaluator precision = args[1].createScalarEvaluator(ctx); |
| 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() throws HyracksDataException { |
| byte[] bytes = argPrecision.getByteArray(); |
| int offset = argPrecision.getStartOffset(); |
| |
| if (bytes[offset] == ATypeTag.SERIALIZED_INT8_TYPE_TAG) { |
| return AInt8SerializerDeserializer.getByte(bytes, offset + 1); |
| } else if (bytes[offset] == ATypeTag.SERIALIZED_INT16_TYPE_TAG) { |
| return AInt16SerializerDeserializer.getShort(bytes, offset + 1); |
| } else if (bytes[offset] == ATypeTag.SERIALIZED_INT32_TYPE_TAG) { |
| return AInt32SerializerDeserializer.getInt(bytes, offset + 1); |
| } else if (bytes[offset] == ATypeTag.SERIALIZED_INT64_TYPE_TAG) { |
| return (int) AInt64SerializerDeserializer.getLong(bytes, offset + 1); |
| } else { |
| throw new TypeMismatchException(sourceLoc, getIdentifier(), 1, bytes[offset], |
| ATypeTag.SERIALIZED_INT8_TYPE_TAG, ATypeTag.SERIALIZED_INT16_TYPE_TAG, |
| ATypeTag.SERIALIZED_INT32_TYPE_TAG, ATypeTag.SERIALIZED_INT64_TYPE_TAG); |
| } |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException { |
| resultStorage.reset(); |
| eval.evaluate(tuple, argValue); |
| precision.evaluate(tuple, argPrecision); |
| |
| if (PointableHelper.checkAndSetMissingOrNull(result, argValue, argPrecision)) { |
| return; |
| } |
| |
| byte[] data = argValue.getByteArray(); |
| int offset = argValue.getStartOffset(); |
| |
| if (data[offset] == ATypeTag.SERIALIZED_INT8_TYPE_TAG) { |
| serde = SerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT8); |
| byte val = AInt8SerializerDeserializer.getByte(data, offset + 1); |
| aInt8.setValue(val); |
| serde.serialize(aInt8, out); |
| } else if (data[offset] == ATypeTag.SERIALIZED_INT16_TYPE_TAG) { |
| serde = SerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT16); |
| short val = AInt16SerializerDeserializer.getShort(data, offset + 1); |
| aInt16.setValue(val); |
| serde.serialize(aInt16, out); |
| } else if (data[offset] == ATypeTag.SERIALIZED_INT32_TYPE_TAG) { |
| serde = SerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT32); |
| int val = AInt32SerializerDeserializer.getInt(data, offset + 1); |
| aInt32.setValue(val); |
| serde.serialize(aInt32, out); |
| } else if (data[offset] == ATypeTag.SERIALIZED_INT64_TYPE_TAG) { |
| serde = SerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINT64); |
| long val = AInt64SerializerDeserializer.getLong(data, offset + 1); |
| aInt64.setValue(val); |
| serde.serialize(aInt64, out); |
| } else if (data[offset] == ATypeTag.SERIALIZED_FLOAT_TYPE_TAG) { |
| serde = SerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AFLOAT); |
| float val = AFloatSerializerDeserializer.getFloat(data, offset + 1); |
| if (Float.isNaN(val) || Float.isInfinite(val) || Float.compare(val, -0.0F) == 0 |
| || Float.compare(val, 0.0F) == 0) { |
| aFloat.setValue(val); |
| serde.serialize(aFloat, out); |
| } else { |
| BigDecimal r = new BigDecimal(Float.toString(val)); |
| aFloat.setValue(r.setScale(getPrecision(), BigDecimal.ROUND_HALF_EVEN).floatValue()); |
| serde.serialize(aFloat, out); |
| } |
| } else if (data[offset] == ATypeTag.SERIALIZED_DOUBLE_TYPE_TAG) { |
| serde = SerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ADOUBLE); |
| double val = ADoubleSerializerDeserializer.getDouble(data, offset + 1); |
| if (Double.isNaN(val) || Double.isInfinite(val) || Double.compare(val, -0.0D) == 0 |
| || Double.compare(val, 0.0D) == 0) { |
| aDouble.setValue(val); |
| serde.serialize(aDouble, out); |
| } else { |
| BigDecimal r = new BigDecimal(Double.toString(val)); |
| aDouble.setValue(r.setScale(getPrecision(), BigDecimal.ROUND_HALF_EVEN).doubleValue()); |
| serde.serialize(aDouble, out); |
| } |
| } else { |
| throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, data[offset], |
| ATypeTag.SERIALIZED_INT8_TYPE_TAG, ATypeTag.SERIALIZED_INT16_TYPE_TAG, |
| ATypeTag.SERIALIZED_INT32_TYPE_TAG, ATypeTag.SERIALIZED_INT64_TYPE_TAG, |
| ATypeTag.SERIALIZED_FLOAT_TYPE_TAG, ATypeTag.SERIALIZED_DOUBLE_TYPE_TAG); |
| } |
| result.set(resultStorage); |
| } |
| }; |
| } |
| }; |
| } |
| |
| } |