| /* |
| * 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. |
| */ |
| package org.apache.asterix.runtime.evaluators.functions.temporal; |
| |
| import java.io.DataOutput; |
| |
| import org.apache.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer; |
| import org.apache.asterix.om.base.temporal.ATimeParserFactory; |
| import org.apache.asterix.om.base.temporal.GregorianCalendarSystem; |
| import org.apache.asterix.om.base.temporal.GregorianCalendarSystem.Fields; |
| import org.apache.asterix.om.functions.AsterixBuiltinFunctions; |
| 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.EnumDeserializer; |
| import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor; |
| import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator; |
| import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory; |
| import org.apache.hyracks.api.context.IHyracksTaskContext; |
| import org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.primitive.UTF8StringPointable; |
| 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; |
| import org.apache.hyracks.util.string.UTF8StringWriter; |
| |
| public class AdjustDateTimeForTimeZoneDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private final static long serialVersionUID = 1L; |
| public final static FunctionIdentifier FID = AsterixBuiltinFunctions.ADJUST_DATETIME_FOR_TIMEZONE; |
| public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| |
| @Override |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new AdjustDateTimeForTimeZoneDescriptor(); |
| } |
| }; |
| |
| /* (non-Javadoc) |
| * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[]) |
| */ |
| @Override |
| public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) |
| throws AlgebricksException { |
| return new IScalarEvaluatorFactory() { |
| |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public IScalarEvaluator createScalarEvaluator(final IHyracksTaskContext ctx) throws AlgebricksException { |
| return new IScalarEvaluator() { |
| |
| private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage(); |
| private DataOutput out = resultStorage.getDataOutput(); |
| private IPointable argPtr0 = new VoidPointable(); |
| private IPointable argPtr1 = new VoidPointable(); |
| private IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx); |
| private IScalarEvaluator eval1 = args[1].createScalarEvaluator(ctx); |
| |
| // possible output types |
| private GregorianCalendarSystem calInstance = GregorianCalendarSystem.getInstance(); |
| |
| private final UTF8StringPointable utf8Ptr = new UTF8StringPointable(); |
| private final UTF8StringWriter utf8Writer = new UTF8StringWriter(); |
| |
| @Override |
| public void evaluate(IFrameTupleReference tuple, IPointable result) throws AlgebricksException { |
| resultStorage.reset(); |
| eval0.evaluate(tuple, argPtr0); |
| eval1.evaluate(tuple, argPtr1); |
| |
| byte[] bytes0 = argPtr0.getByteArray(); |
| int offset0 = argPtr0.getStartOffset(); |
| byte[] bytes1 = argPtr1.getByteArray(); |
| int offset1 = argPtr1.getStartOffset(); |
| int len1 = argPtr1.getLength(); |
| |
| try { |
| if (bytes0[offset0] != ATypeTag.SERIALIZED_DATETIME_TYPE_TAG) { |
| throw new AlgebricksException( |
| FID.getName() + ": expects type DATETIME/NULL for parameter 0 but got " |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(bytes0[offset0])); |
| } |
| |
| if (bytes1[offset1] != ATypeTag.SERIALIZED_STRING_TYPE_TAG) { |
| throw new AlgebricksException( |
| FID.getName() + ": expects type STRING/NULL for parameter 1 but got " |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(bytes1[offset1])); |
| } |
| |
| utf8Ptr.set(bytes1, offset1 + 1, len1 - 1); |
| int timezone = ATimeParserFactory.parseTimezonePart(utf8Ptr.getByteArray(), |
| utf8Ptr.getCharStartOffset()); |
| |
| if (!calInstance.validateTimeZone(timezone)) { |
| throw new AlgebricksException(FID.getName() + ": wrong format for a time zone string!"); |
| } |
| |
| long chronon = ADateTimeSerializerDeserializer.getChronon(bytes0, offset0 + 1); |
| |
| chronon = calInstance.adjustChrononByTimezone(chronon, timezone); |
| |
| StringBuilder sbder = new StringBuilder(); |
| calInstance.getExtendStringRepUntilField(chronon, timezone, sbder, Fields.YEAR, |
| Fields.MILLISECOND, true); |
| |
| out.writeByte(ATypeTag.SERIALIZED_STRING_TYPE_TAG); |
| utf8Writer.writeUTF8(sbder.toString(), out); |
| } catch (Exception e1) { |
| throw new AlgebricksException(e1); |
| } |
| result.set(resultStorage); |
| } |
| }; |
| } |
| }; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.asterix.om.functions.IFunctionDescriptor#getIdentifier() |
| */ |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| } |