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.loading.sort.unsafe.comparator;
  
  import java.util.Comparator;
  
  import org.apache.carbondata.core.memory.CarbonUnsafe;
  import org.apache.carbondata.core.metadata.datatype.DataType;
  import org.apache.carbondata.core.util.ByteUtil.UnsafeComparer;
  import org.apache.carbondata.core.util.CarbonUnsafeUtil;
  import org.apache.carbondata.core.util.DataTypeUtil;
  import org.apache.carbondata.core.util.comparator.SerializableComparator;
  import org.apache.carbondata.processing.loading.sort.unsafe.UnsafeCarbonRowPage;
  import org.apache.carbondata.processing.loading.sort.unsafe.holder.UnsafeCarbonRow;
  import org.apache.carbondata.processing.sort.sortdata.TableFieldStat;
  
  public class UnsafeRowComparator implements Comparator<UnsafeCarbonRow> {
    private Object baseObject;
    private TableFieldStat tableFieldStat;
    private int dictSizeInMemory;
  
    public UnsafeRowComparator(UnsafeCarbonRowPage rowPage) {
      this.baseObject = rowPage.getDataBlock().getBaseObject();
      this.tableFieldStat = rowPage.getTableFieldStat();
      this.dictSizeInMemory = tableFieldStat.getDictSortDimCnt() * 4;
    }
  
    /**
     * Below method will be used to compare two mdkey
     */
    @Override
    public int compare(UnsafeCarbonRow rowL, UnsafeCarbonRow rowR) {
      return compare(rowL, baseObject, rowR, baseObject);
    }
  
    /**
     * Below method will be used to compare two mdkey
     */
    public int compare(UnsafeCarbonRow rowL, Object baseObjectL, UnsafeCarbonRow rowR,
        Object baseObjectR) {
      int diff = 0;
      long rowA = rowL.address;
      long rowB = rowR.address;
      int sizeInDictPartA = 0;
      int noDicSortIdx = 0;
  
      int sizeInNonDictPartA = 0;
      int sizeInDictPartB = 0;
      int sizeInNonDictPartB = 0;
      for (boolean isNoDictionary : tableFieldStat.getIsSortColNoDictFlags()) {
        if (isNoDictionary) {
          short lengthA = CarbonUnsafe.getUnsafe().getShort(baseObjectL,
              rowA + dictSizeInMemory + sizeInNonDictPartA);
          sizeInNonDictPartA += 2;
          short lengthB = CarbonUnsafe.getUnsafe().getShort(baseObjectR,
              rowB + dictSizeInMemory + sizeInNonDictPartB);
          sizeInNonDictPartB += 2;
          DataType dataType = tableFieldStat.getNoDictDataType()[noDicSortIdx++];
          if (DataTypeUtil.isPrimitiveColumn(dataType)) {
            Object data1 = null;
            if (0 != lengthA) {
              data1 = CarbonUnsafeUtil
                  .getDataFromUnsafe(dataType, baseObjectL, rowA + dictSizeInMemory,
                      sizeInNonDictPartA, lengthA);
              sizeInNonDictPartA += lengthA;
            }
            Object data2 = null;
            if (0 != lengthB) {
              data2 = CarbonUnsafeUtil
                  .getDataFromUnsafe(dataType, baseObjectR, rowB + dictSizeInMemory,
                      sizeInNonDictPartB, lengthB);
              sizeInNonDictPartB += lengthB;
            }
            // use the data type based comparator for the no dictionary encoded columns
            SerializableComparator comparator =
                org.apache.carbondata.core.util.comparator.Comparator.getComparator(dataType);
            int difference = comparator.compare(data1, data2);
            if (difference != 0) {
              return difference;
            }
          } else {
            byte[] byteArr1 = new byte[lengthA];
            CarbonUnsafe.getUnsafe()
                .copyMemory(baseObjectL, rowA + dictSizeInMemory + sizeInNonDictPartA, byteArr1,
                    CarbonUnsafe.BYTE_ARRAY_OFFSET, lengthA);
            sizeInNonDictPartA += lengthA;
  
            byte[] byteArr2 = new byte[lengthB];
            CarbonUnsafe.getUnsafe()
                .copyMemory(baseObjectR, rowB + dictSizeInMemory + sizeInNonDictPartB, byteArr2,
                    CarbonUnsafe.BYTE_ARRAY_OFFSET, lengthB);
            sizeInNonDictPartB += lengthB;
  
            int difference = UnsafeComparer.INSTANCE.compareTo(byteArr1, byteArr2);
            if (difference != 0) {
              return difference;
            }
          }
        } else {
          int dimFieldA = CarbonUnsafe.getUnsafe().getInt(baseObjectL, rowA + sizeInDictPartA);
          sizeInDictPartA += 4;
          int dimFieldB = CarbonUnsafe.getUnsafe().getInt(baseObjectR, rowB + sizeInDictPartB);
          sizeInDictPartB += 4;
          diff = dimFieldA - dimFieldB;
          if (diff != 0) {
            return diff;
          }
        }
      }
  
      return diff;
    }
  }
  