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.functions.temporal;
  
  import java.io.DataOutput;
  
  import org.apache.asterix.common.annotations.MissingNullInOutFunction;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.AInterval;
  import org.apache.asterix.om.base.AMutableInterval;
  import org.apache.asterix.om.base.ANull;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
  import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
  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.IncompatibleTypeException;
  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.TaggedValuePointable;
  import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
  import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
  
  @MissingNullInOutFunction
  public class GetOverlappingIntervalDescriptor extends AbstractScalarFunctionDynamicDescriptor {
      private static final long serialVersionUID = 1L;
      public static final IFunctionDescriptorFactory FACTORY = GetOverlappingIntervalDescriptor::new;
  
      @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 final IntervalLogic il = new IntervalLogic();
                      private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
                      private DataOutput out = resultStorage.getDataOutput();
                      private TaggedValuePointable argPtr0 = TaggedValuePointable.FACTORY.createPointable();
                      private TaggedValuePointable argPtr1 = TaggedValuePointable.FACTORY.createPointable();
                      private AIntervalPointable interval0 =
                              (AIntervalPointable) AIntervalPointable.FACTORY.createPointable();
                      private AIntervalPointable interval1 =
                              (AIntervalPointable) AIntervalPointable.FACTORY.createPointable();
                      private IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx);
                      private IScalarEvaluator eval1 = args[1].createScalarEvaluator(ctx);
  
                      private final AMutableInterval aInterval = new AMutableInterval(0, 0, (byte) -1);
  
                      @SuppressWarnings("unchecked")
                      private final ISerializerDeserializer<ANull> nullSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ANULL);
                      @SuppressWarnings("unchecked")
                      private final ISerializerDeserializer<AInterval> intervalSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINTERVAL);
  
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          resultStorage.reset();
                          eval0.evaluate(tuple, argPtr0);
                          eval1.evaluate(tuple, argPtr1);
  
                          if (PointableHelper.checkAndSetMissingOrNull(result, argPtr0, argPtr1)) {
                              return;
                          }
  
                          byte type0 = argPtr0.getTag();
                          byte type1 = argPtr1.getTag();
  
                          if (type0 == ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG && type0 == type1) {
                              argPtr0.getValue(interval0);
                              argPtr1.getValue(interval1);
                              byte intervalType0 = interval0.getType();
                              byte intervalType1 = interval1.getType();
  
                              if (intervalType0 != intervalType1) {
                                  throw new IncompatibleTypeException(sourceLoc, getIdentifier(), intervalType0,
                                          intervalType1);
                              }
  
                              if (il.overlaps(interval0, interval1) || il.overlappedBy(interval0, interval1)
                                      || il.covers(interval0, interval1) || il.coveredBy(interval0, interval1)) {
                                  long start = Math.max(interval0.getStartValue(), interval1.getStartValue());
                                  long end = Math.min(interval0.getEndValue(), interval1.getEndValue());
                                  aInterval.setValue(start, end, intervalType0);
                                  intervalSerde.serialize(aInterval, out);
                              } else {
                                  nullSerde.serialize(ANull.NULL, out);
                              }
                              result.set(resultStorage);
                          } else if (type0 != ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG) {
                              throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, type0,
                                      ATypeTag.SERIALIZED_INTERVAL_TYPE_TAG);
                          } else {
                              throw new IncompatibleTypeException(sourceLoc, getIdentifier(), type0, type1);
                          }
                      }
  
                  };
              }
          };
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.GET_OVERLAPPING_INTERVAL;
      }
  }
  