content: /*
   * 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.constructors;
  
  import java.io.DataOutput;
  import java.io.IOException;
  
  import org.apache.asterix.common.annotations.MissingNullInOutFunction;
  import org.apache.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
  import org.apache.asterix.dataflow.data.nontagged.serde.ADayTimeDurationSerializerDeserializer;
  import org.apache.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
  import org.apache.asterix.dataflow.data.nontagged.serde.AYearMonthDurationSerializerDeserializer;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.AInterval;
  import org.apache.asterix.om.base.AMutableDuration;
  import org.apache.asterix.om.base.AMutableInterval;
  import org.apache.asterix.om.base.temporal.ADateParserFactory;
  import org.apache.asterix.om.base.temporal.ADurationParserFactory;
  import org.apache.asterix.om.base.temporal.ADurationParserFactory.ADurationParseOption;
  import org.apache.asterix.om.base.temporal.ATimeParserFactory;
  import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  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.evaluators.functions.PointableHelper;
  import org.apache.asterix.runtime.exceptions.InvalidDataFormatException;
  import org.apache.asterix.runtime.exceptions.TypeMismatchException;
  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.IEvaluatorContext;
  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.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;
  
  @MissingNullInOutFunction
  public class AIntervalStartFromDateTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
      private static final long serialVersionUID = 1L;
      public final static FunctionIdentifier FID = BuiltinFunctions.INTERVAL_CONSTRUCTOR_START_FROM_DATETIME;
      public static final IFunctionDescriptorFactory FACTORY = AIntervalStartFromDateTimeConstructorDescriptor::new;
  
      @Override
      public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
          return new IScalarEvaluatorFactory() {
              private static final long serialVersionUID = 1L;
  
              @Override
              public IScalarEvaluator createScalarEvaluator(IEvaluatorContext ctx) throws HyracksDataException {
                  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);
  
                      private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0);
                      private AMutableDuration aDuration = new AMutableDuration(0, 0L);
                      @SuppressWarnings("unchecked")
                      private ISerializerDeserializer<AInterval> intervalSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINTERVAL);
                      private final UTF8StringPointable utf8Ptr = new UTF8StringPointable();
  
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          eval0.evaluate(tuple, argPtr0);
                          eval1.evaluate(tuple, argPtr1);
  
                          if (PointableHelper.checkAndSetMissingOrNull(result, argPtr0, argPtr1)) {
                              return;
                          }
  
                          byte[] bytes0 = argPtr0.getByteArray();
                          int offset0 = argPtr0.getStartOffset();
                          int len0 = argPtr0.getLength();
                          byte[] bytes1 = argPtr1.getByteArray();
                          int offset1 = argPtr1.getStartOffset();
                          int len1 = argPtr1.getLength();
  
                          try {
                              long intervalStart = 0, intervalEnd = 0;
                              if (bytes0[offset0] == ATypeTag.SERIALIZED_DATETIME_TYPE_TAG) {
                                  intervalStart = ADateTimeSerializerDeserializer.getChronon(bytes0, offset0 + 1);
                              } else if (bytes0[offset0] == ATypeTag.SERIALIZED_STRING_TYPE_TAG) {
                                  utf8Ptr.set(bytes0, offset0 + 1, len0 - 1);
  
                                  int stringLength = utf8Ptr.getUTF8Length();
                                  int startOffset = utf8Ptr.getCharStartOffset();
  
                                  // get offset for time part: +1 if it is negative (-)
                                  short timeOffset = (short) ((bytes0[startOffset] == '-') ? 1 : 0);
  
                                  timeOffset += 8;
  
                                  if (bytes0[startOffset + timeOffset] != 'T') {
                                      timeOffset += 2;
                                      if (argPtr0.getByteArray()[startOffset + timeOffset] != 'T') {
                                          throw new InvalidDataFormatException(sourceLoc, getIdentifier(),
                                                  ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG);
                                      }
                                  }
  
                                  intervalStart = ADateParserFactory.parseDatePart(bytes0, startOffset, timeOffset);
                                  intervalStart += ATimeParserFactory.parseTimePart(bytes0, startOffset + timeOffset + 1,
                                          stringLength - timeOffset - 1);
                              } else {
                                  throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, bytes0[offset0],
                                          ATypeTag.SERIALIZED_DATETIME_TYPE_TAG, ATypeTag.SERIALIZED_STRING_TYPE_TAG);
                              }
  
                              if (bytes1[offset1] == ATypeTag.SERIALIZED_DURATION_TYPE_TAG) {
                                  intervalEnd = DurationArithmeticOperations.addDuration(intervalStart,
                                          ADurationSerializerDeserializer.getYearMonth(bytes1, offset1 + 1),
                                          ADurationSerializerDeserializer.getDayTime(bytes1, offset1 + 1), false);
                              } else if (bytes1[offset1] == ATypeTag.SERIALIZED_YEAR_MONTH_DURATION_TYPE_TAG) {
                                  intervalEnd = DurationArithmeticOperations.addDuration(intervalStart,
                                          AYearMonthDurationSerializerDeserializer.getYearMonth(bytes1, offset1 + 1), 0,
                                          false);
                              } else if (bytes1[offset1] == ATypeTag.SERIALIZED_DAY_TIME_DURATION_TYPE_TAG) {
                                  intervalEnd = DurationArithmeticOperations.addDuration(intervalStart, 0,
                                          ADayTimeDurationSerializerDeserializer.getDayTime(bytes1, offset1 + 1), false);
                              } else if (bytes1[offset1] == ATypeTag.SERIALIZED_STRING_TYPE_TAG) {
                                  // duration
                                  utf8Ptr.set(bytes1, offset1 + 1, len1 - 1);
                                  int stringLength = utf8Ptr.getUTF8Length();
                                  ADurationParserFactory.parseDuration(bytes1, utf8Ptr.getCharStartOffset(), stringLength,
                                          aDuration, ADurationParseOption.All);
                                  intervalEnd = DurationArithmeticOperations.addDuration(intervalStart,
                                          aDuration.getMonths(), aDuration.getMilliseconds(), false);
                              } else {
                                  throw new TypeMismatchException(sourceLoc, getIdentifier(), 1, bytes1[offset1],
                                          ATypeTag.SERIALIZED_DATE_TYPE_TAG, ATypeTag.SERIALIZED_STRING_TYPE_TAG);
                              }
  
                              if (intervalEnd < intervalStart) {
                                  throw new InvalidDataFormatException(sourceLoc, getIdentifier(),
                                          ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG);
                              }
  
                              aInterval.setValue(intervalStart, intervalEnd, ATypeTag.SERIALIZED_DATETIME_TYPE_TAG);
                              intervalSerde.serialize(aInterval, out);
                          } catch (IOException e) {
                              throw new InvalidDataFormatException(sourceLoc, getIdentifier(), e,
                                      ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG);
                          }
                          result.set(resultStorage);
                      }
                  };
              }
          };
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return FID;
      }
  
  }
  