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.carbondata.processing.sort.sortdata;
  
  import java.util.Comparator;
  
  import org.apache.carbondata.core.metadata.datatype.DataType;
  import org.apache.carbondata.core.util.ByteUtil.UnsafeComparer;
  import org.apache.carbondata.core.util.DataTypeUtil;
  import org.apache.carbondata.core.util.comparator.SerializableComparator;
  import org.apache.carbondata.processing.loading.row.IntermediateSortTempRow;
  
  /**
   * This class is used as comparator for comparing intermediate sort temp row
   */
  public class IntermediateSortTempRowComparator implements Comparator<IntermediateSortTempRow> {
    /**
     * isSortColumnNoDictionary whether the sort column is not dictionary or not
     */
    private boolean[] isSortColumnNoDictionary;
  
    private DataType[] noDicSortDataTypes;
  
    /**
     * @param isSortColumnNoDictionary isSortColumnNoDictionary
     */
    public IntermediateSortTempRowComparator(boolean[] isSortColumnNoDictionary,
        DataType[] noDicSortDataTypes) {
      this.isSortColumnNoDictionary = isSortColumnNoDictionary;
      this.noDicSortDataTypes = noDicSortDataTypes;
    }
  
    /**
     * Below method will be used to compare two sort temp row
     */
    @Override
    public int compare(IntermediateSortTempRow rowA, IntermediateSortTempRow rowB) {
      int diff = 0;
      int dictIndex = 0;
      int nonDictIndex = 0;
      int noDicTypeIdx = 0;
  
      for (boolean isNoDictionary : isSortColumnNoDictionary) {
  
        if (isNoDictionary) {
          if (DataTypeUtil.isPrimitiveColumn(noDicSortDataTypes[noDicTypeIdx])) {
            // use data types based comparator for the no dictionary measure columns
            SerializableComparator comparator = org.apache.carbondata.core.util.comparator.Comparator
                .getComparator(noDicSortDataTypes[noDicTypeIdx]);
            int difference = comparator.compare(rowA.getNoDictSortDims()[nonDictIndex],
                rowB.getNoDictSortDims()[nonDictIndex]);
            if (difference != 0) {
              return difference;
            }
          } else {
            byte[] byteArr1 = (byte[]) rowA.getNoDictSortDims()[nonDictIndex];
            byte[] byteArr2 = (byte[]) rowB.getNoDictSortDims()[nonDictIndex];
  
            int difference = UnsafeComparer.INSTANCE.compareTo(byteArr1, byteArr2);
            if (difference != 0) {
              return difference;
            }
          }
          nonDictIndex++;
          noDicTypeIdx++;
        } else {
          int dimFieldA = rowA.getDictSortDims()[dictIndex];
          int dimFieldB = rowB.getDictSortDims()[dictIndex];
          dictIndex++;
  
          diff = dimFieldA - dimFieldB;
          if (diff != 0) {
            return diff;
          }
        }
      }
      return diff;
    }
  }
  