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.operators.joins.interval.utils;
  
  import org.apache.asterix.dataflow.data.nontagged.serde.ADateSerializerDeserializer;
  import org.apache.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
  import org.apache.asterix.dataflow.data.nontagged.serde.ATimeSerializerDeserializer;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.hyracks.api.context.IHyracksTaskContext;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.dataflow.common.data.partition.range.RangeMap;
  
  public class OverlappingIntervalJoinUtilFactory implements IIntervalJoinUtilFactory {
      private static final long serialVersionUID = 1L;
      private final RangeMap rangeMap;
  
      public OverlappingIntervalJoinUtilFactory(RangeMap rangeMap) {
          this.rangeMap = rangeMap;
      }
  
      @Override
      public IIntervalJoinUtil createIntervalMergeJoinUtil(int buildKey, int probeKey, IHyracksTaskContext ctx,
              int nPartitions) throws HyracksDataException {
          int fieldIndex = 0;
          int partition = ctx.getTaskAttemptId().getTaskId().getPartition();
          //Calculate Partitions slot
          int nRanges = rangeMap.getSplitCount() + 1;
          double rangesPerPart = 1.0;
          if (nRanges > nPartitions) {
              rangesPerPart = ((double) nRanges) / nPartitions;
          }
          int slot = ((int) Math.ceil(partition * rangesPerPart) % nRanges) - 1;
          //Find Partitions Start Value based on slot
          long partitionStart = Long.MIN_VALUE;
          if (slot >= 0) {
              switch (ATypeTag.VALUE_TYPE_MAPPING[rangeMap.getTag(fieldIndex, slot)]) {
                  case DATETIME:
                      partitionStart = ADateTimeSerializerDeserializer.getChronon(rangeMap.getByteArray(),
                              rangeMap.getStartOffset(fieldIndex, slot) + 1);
                      break;
                  case DATE:
                      partitionStart = ADateSerializerDeserializer.getChronon(rangeMap.getByteArray(),
                              rangeMap.getStartOffset(fieldIndex, slot) + 1);
                      break;
                  case TIME:
                      partitionStart = ATimeSerializerDeserializer.getChronon(rangeMap.getByteArray(),
                              rangeMap.getStartOffset(fieldIndex, slot) + 1);
                      break;
                  default:
                      throw new HyracksDataException("RangeMap type is not supported");
              }
          }
          return new OverlappingIntervalJoinUtil(buildKey, probeKey, partitionStart);
      }
  }
  