| /* |
| * Copyright 2009-2011 by The Regents of the University of California |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.asterix.runtime.evaluators.constructors; |
| |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import edu.uci.ics.asterix.common.functions.FunctionConstants; |
| import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer; |
| import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider; |
| import edu.uci.ics.asterix.om.base.AInterval; |
| import edu.uci.ics.asterix.om.base.AMutableInterval; |
| import edu.uci.ics.asterix.om.base.ANull; |
| import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory; |
| import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory; |
| 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.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.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 AIntervalFromDateTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, |
| "interval-from-datetime", 2); |
| private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize(); |
| private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize(); |
| private final static byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize(); |
| |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new AIntervalFromDateTimeConstructorDescriptor(); |
| } |
| }; |
| |
| @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 argOut0 = new ArrayBackedValueStorage(); |
| private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage(); |
| private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0); |
| private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1); |
| private String errorMessage = "This can not be an instance of interval (from DateTime)"; |
| //TODO: Where to move and fix these? |
| private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0); |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.AINTERVAL); |
| @SuppressWarnings("unchecked") |
| private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE |
| .getSerializerDeserializer(BuiltinType.ANULL); |
| |
| @Override |
| public void evaluate(IFrameTupleReference tuple) throws AlgebricksException { |
| |
| argOut0.reset(); |
| argOut1.reset(); |
| eval0.evaluate(tuple); |
| eval1.evaluate(tuple); |
| |
| try { |
| |
| if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG |
| || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) { |
| nullSerde.serialize(ANull.NULL, out); |
| return; |
| } |
| |
| long intervalStart = 0, intervalEnd = 0; |
| |
| if (argOut0.getByteArray()[0] == SER_DATETIME_TYPE_TAG) { |
| intervalStart = ADateTimeSerializerDeserializer.getChronon(argOut0.getByteArray(), 1); |
| } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG) { |
| // start datetime |
| int stringLength = (argOut0.getByteArray()[1] & 0xff << 8) |
| + (argOut0.getByteArray()[2] & 0xff << 0); |
| // get offset for time part: +1 if it is negative (-) |
| short timeOffset = (short) ((argOut0.getByteArray()[3] == '-') ? 1 : 0); |
| timeOffset += 8; |
| if (argOut0.getByteArray()[3 + timeOffset] != 'T') { |
| timeOffset += 2; |
| if (argOut0.getByteArray()[3 + timeOffset] != 'T') { |
| throw new AlgebricksException(errorMessage + ": missing T"); |
| } |
| } |
| intervalStart = ADateParserFactory.parseDatePart(argOut0.getByteArray(), 3, timeOffset); |
| intervalStart += ATimeParserFactory.parseTimePart(argOut0.getByteArray(), |
| 3 + timeOffset + 1, stringLength - timeOffset - 1); |
| } else { |
| throw new AlgebricksException(FID.getName() |
| + ": expects NULL/STRING/DATETIME for the first argument, but got " |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(argOut0.getByteArray()[0])); |
| } |
| |
| if (argOut1.getByteArray()[0] == SER_DATETIME_TYPE_TAG) { |
| intervalEnd = ADateTimeSerializerDeserializer.getChronon(argOut1.getByteArray(), 1); |
| } else if (argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) { |
| // start datetime |
| int stringLength = (argOut1.getByteArray()[1] & 0xff << 8) |
| + (argOut1.getByteArray()[2] & 0xff << 0); |
| // get offset for time part: +1 if it is negative (-) |
| short timeOffset = (short) ((argOut1.getByteArray()[3] == '-') ? 1 : 0); |
| timeOffset += 8; |
| if (argOut1.getByteArray()[3 + timeOffset] != 'T') { |
| timeOffset += 2; |
| if (argOut1.getByteArray()[3 + timeOffset] != 'T') { |
| throw new AlgebricksException(errorMessage + ": missing T"); |
| } |
| } |
| intervalEnd = ADateParserFactory.parseDatePart(argOut1.getByteArray(), 3, timeOffset); |
| intervalEnd += ATimeParserFactory.parseTimePart(argOut1.getByteArray(), |
| 3 + timeOffset + 1, stringLength - timeOffset - 1); |
| } else { |
| throw new AlgebricksException(FID.getName() |
| + ": expects NULL/STRING/DATETIME for the second argument, but got " |
| + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(argOut1.getByteArray()[0])); |
| } |
| |
| if (intervalEnd < intervalStart) { |
| throw new AlgebricksException(FID.getName() |
| + ": interval end must not be less than the interval start."); |
| } |
| |
| aInterval.setValue(intervalStart, intervalEnd, ATypeTag.DATETIME.serialize()); |
| intervalSerde.serialize(aInterval, out); |
| |
| } catch (IOException e1) { |
| throw new AlgebricksException(errorMessage); |
| } catch (Exception e2) { |
| throw new AlgebricksException(e2); |
| } |
| } |
| }; |
| } |
| }; |
| } |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| } |