| /* |
| * 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.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.ATimeParserFactory; |
| import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem; |
| 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.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 AIntervalFromTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor { |
| |
| private static final long serialVersionUID = 1L; |
| public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, |
| "interval-from-time", 2); |
| private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize(); |
| private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize(); |
| |
| public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() { |
| public IFunctionDescriptor createFunctionDescriptor() { |
| return new AIntervalFromTimeConstructorDescriptor(); |
| } |
| }; |
| |
| @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 Date)"; |
| //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); |
| } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG |
| && argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) { |
| // start date |
| int stringLength = (argOut0.getByteArray()[1] & 0xff << 8) |
| + (argOut0.getByteArray()[2] & 0xff << 0); |
| |
| long intervalStart = ATimeParserFactory.parseTimePart(argOut0.getByteArray(), 3, |
| stringLength); |
| if (intervalStart < 0) { |
| intervalStart += GregorianCalendarSystem.CHRONON_OF_DAY; |
| } |
| |
| // end date |
| stringLength = (argOut1.getByteArray()[1] & 0xff << 8) |
| + (argOut1.getByteArray()[2] & 0xff << 0); |
| |
| long intervalEnd = ATimeParserFactory.parseTimePart(argOut1.getByteArray(), 3, |
| stringLength); |
| if (intervalEnd < 0) { |
| intervalEnd += GregorianCalendarSystem.CHRONON_OF_DAY; |
| } |
| |
| if (intervalEnd < intervalStart) { |
| throw new AlgebricksException( |
| "Interval end must not be less than the interval start."); |
| } |
| |
| aInterval.setValue(intervalStart, intervalEnd, ATypeTag.TIME.serialize()); |
| intervalSerde.serialize(aInterval, out); |
| } else { |
| throw new AlgebricksException("Wrong format for interval constructor from dates."); |
| } |
| |
| } catch (IOException e1) { |
| throw new AlgebricksException(errorMessage); |
| } catch (Exception e2) { |
| throw new AlgebricksException(e2); |
| } |
| } |
| }; |
| } |
| }; |
| } |
| |
| @Override |
| public FunctionIdentifier getIdentifier() { |
| return FID; |
| } |
| |
| } |