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.spatial.utils;
  
  import org.apache.asterix.om.base.ARectangle;
  import org.apache.asterix.runtime.evaluators.common.SpatialUtils;
  import org.apache.asterix.runtime.operators.joins.spatial.utils.memory.SpatialJoinUtil;
  import org.apache.hyracks.api.comm.IFrameTupleAccessor;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  public class IntersectSpatialJoinUtil implements ISpatialJoinUtil {
  
      protected final int[] idBuild;
      protected final int[] idProbe;
  
      public IntersectSpatialJoinUtil(int[] idBuild, int[] idProbe) {
          this.idBuild = idBuild;
          this.idProbe = idProbe;
      }
  
      /**
       * Right (second argument) interval starts before left (first argument) interval ends.
       */
      @Override
      public boolean checkToSaveInMemory(IFrameTupleAccessor buildAccessor, int buildTupleIndex,
              IFrameTupleAccessor probeAccessor, int probeTupleIndex) throws HyracksDataException {
          int buildTileId = SpatialJoinUtil.getTileId(buildAccessor, buildTupleIndex, idBuild[0]);
          int probeTileId = SpatialJoinUtil.getTileId(probeAccessor, probeTupleIndex, idProbe[0]);
          double buildXmin = SpatialJoinUtil.getRectangleXmin(buildAccessor, buildTupleIndex, idBuild[1]);
          double probeXmax = SpatialJoinUtil.getRectangleXmax(probeAccessor, probeTupleIndex, idProbe[1]);
  
          if (buildTileId == probeTileId) {
              return buildXmin < probeXmax;
          } else {
              return false;
          }
      }
  
      /**
       * Left (first argument) interval starts after the Right (second argument) interval ends.
       */
      @Override
      public boolean checkToRemoveInMemory(IFrameTupleAccessor buildAccessor, int buildTupleIndex,
              IFrameTupleAccessor probeAccessor, int probeTupleIndex) throws HyracksDataException {
          int buildTileId = SpatialJoinUtil.getTileId(buildAccessor, buildTupleIndex, idBuild[0]);
          int probeTileId = SpatialJoinUtil.getTileId(probeAccessor, probeTupleIndex, idProbe[0]);
          double buildXmin = SpatialJoinUtil.getRectangleXmin(buildAccessor, buildTupleIndex, idBuild[1]);
          double probeXmax = SpatialJoinUtil.getRectangleXmax(probeAccessor, probeTupleIndex, idProbe[1]);
  
          if (buildTileId != probeTileId) {
              return true;
          } else {
              return buildXmin >= probeXmax;
          }
      }
  
      @Override
      public boolean checkToSaveInResult(IFrameTupleAccessor buildAccessor, int buildTupleIndex,
              IFrameTupleAccessor probeAccessor, int probeTupleIndex) throws HyracksDataException {
          int buildTileId = SpatialJoinUtil.getTileId(buildAccessor, buildTupleIndex, idBuild[0]);
          int probeTileId = SpatialJoinUtil.getTileId(probeAccessor, probeTupleIndex, idProbe[0]);
          ARectangle rectBuild = SpatialJoinUtil.getRectangle(buildAccessor, buildTupleIndex, idBuild[1]);
          ARectangle rectProbe = SpatialJoinUtil.getRectangle(probeAccessor, probeTupleIndex, idProbe[1]);
  
          if (buildTileId == probeTileId) {
              return compareRectangle(rectBuild, rectProbe);
          } else {
              return false;
          }
      }
  
      /**
       * Right (second argument) rectangle starts before left (first argument) rectangle ends.
       */
      @Override
      public boolean checkForEarlyExit(IFrameTupleAccessor buildAccessor, int buildTupleIndex,
              IFrameTupleAccessor probeAccessor, int probeTupleIndex) throws HyracksDataException {
          int buildTileId = SpatialJoinUtil.getTileId(buildAccessor, buildTupleIndex, idBuild[0]);
          int probeTileId = SpatialJoinUtil.getTileId(probeAccessor, probeTupleIndex, idProbe[0]);
          double probeXmin = SpatialJoinUtil.getRectangleXmin(probeAccessor, probeTupleIndex, idProbe[1]);
          double buildXmax = SpatialJoinUtil.getRectangleXmax(buildAccessor, buildTupleIndex, idBuild[1]);
  
          if (buildTileId != probeTileId) {
              return true;
          } else {
              return buildXmax < probeXmin;
          }
      }
  
      @Override
      public boolean compareRectangle(ARectangle rectBuild, ARectangle rectProbe) {
          return SpatialUtils.intersects(rectBuild, rectProbe);
      }
  
      @Override
      public boolean checkToLoadNextProbeTuple(IFrameTupleAccessor buildAccessor, int buildTupleIndex,
              IFrameTupleAccessor probeAccessor, int probeTupleIndex) throws HyracksDataException {
          int buildTileId = SpatialJoinUtil.getTileId(buildAccessor, buildTupleIndex, idBuild[0]);
          int probeTileId = SpatialJoinUtil.getTileId(probeAccessor, probeTupleIndex, idProbe[0]);
          double probeXmin = SpatialJoinUtil.getRectangleXmin(probeAccessor, probeTupleIndex, idProbe[1]);
          double buildXmax = SpatialJoinUtil.getRectangleXmax(buildAccessor, buildTupleIndex, idBuild[1]);
  
          if (buildTileId == probeTileId) {
              return buildXmax > probeXmin;
          }
          return buildTileId >= probeTileId;
      }
  }
  