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.spark.sql.secondaryindex.load;
  
  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;
  
  /**
   * This class is for comparing the two MDKeys in no kettle flow.
   */
  public class RowComparator implements Comparator<Object[]> {
  
    /**
     * noDictionaryColMaping mapping of dictionary dimensions and no dictionary dimensions.
     */
    private boolean[] noDictionaryColMapping;
  
    private DataType[] noDicDataTypes;
  
    public RowComparator(boolean[] noDictionaryColMapping, DataType[] noDicDataTypes) {
      this.noDictionaryColMapping = noDictionaryColMapping;
      this.noDicDataTypes = noDicDataTypes;
    }
  
    /**
     * Below method will be used to compare two MDKeys
     */
    @Override
    public int compare(Object[] rowA, Object[] rowB) {
      int diff = 0;
      int index = 0;
      int noDictionaryIndex = 0;
      int dataTypeIdx = 0;
      int[] leftMdkArray = (int[]) rowA[0];
      int[] rightMdkArray = (int[]) rowB[0];
      Object[] leftNonDictArray = (Object[]) rowA[1];
      Object[] rightNonDictArray = (Object[]) rowB[1];
      for (boolean isNoDictionary : noDictionaryColMapping) {
        if (isNoDictionary) {
          if (DataTypeUtil.isPrimitiveColumn(noDicDataTypes[dataTypeIdx])) {
            // use data types based comparator for the no dictionary measure columns
            SerializableComparator comparator = org.apache.carbondata.core.util.comparator.Comparator
                .getComparator(noDicDataTypes[dataTypeIdx]);
            int difference = comparator
                .compare(leftNonDictArray[noDictionaryIndex], rightNonDictArray[noDictionaryIndex]);
            if (difference != 0) {
              return difference;
            }
          } else {
            diff = UnsafeComparer.INSTANCE.compareTo((byte[]) leftNonDictArray[noDictionaryIndex],
                (byte[]) rightNonDictArray[noDictionaryIndex]);
            if (diff != 0) {
              return diff;
            }
          }
          noDictionaryIndex++;
          dataTypeIdx++;
        } else {
          diff = leftMdkArray[index] - rightMdkArray[index];
          if (diff != 0) {
            return diff;
          }
          index++;
        }
  
      }
      return diff;
    }
  }
  