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.core.scan.collector.impl;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.carbondata.core.metadata.datatype.DataTypes;
  import org.apache.carbondata.core.scan.executor.infos.BlockExecutionInfo;
  import org.apache.carbondata.core.scan.executor.util.RestructureUtil;
  import org.apache.carbondata.core.scan.filter.GenericQueryType;
  import org.apache.carbondata.core.scan.model.ProjectionMeasure;
  import org.apache.carbondata.core.scan.result.BlockletScannedResult;
  import org.apache.carbondata.core.util.DataTypeUtil;
  
  /**
   * class for handling restructure scenarios for filling result
   */
  public class RestructureBasedDictionaryResultCollector extends DictionaryBasedResultCollector {
  
    private Object[] measureDefaultValues = null;
  
    public RestructureBasedDictionaryResultCollector(BlockExecutionInfo blockExecutionInfos) {
      super(blockExecutionInfos);
      queryDimensions = executionInfo.getActualQueryDimensions();
      queryMeasures = executionInfo.getActualQueryMeasures();
      measureDefaultValues = new Object[queryMeasures.length];
      fillMeasureDefaultValues();
      initDimensionAndMeasureIndexesForFillingData();
      isDimensionExists = queryDimensions.length > 0;
    }
  
    /**
     * Fill measure default measure columns
     */
    private void fillMeasureDefaultValues() {
      for (int i = 0; i < queryMeasures.length; i++) {
        if (!measureInfo.getMeasureExists()[i]) {
          measureDefaultValues[i] = RestructureUtil
              .getMeasureDefaultValueByType(queryMeasures[i].getMeasure().getColumnSchema(),
                  queryMeasures[i].getMeasure().getDefaultValue());
        }
      }
    }
  
    /**
     * This method will add a record both key and value to list object
     * it will keep track of how many record is processed, to handle limit scenario
     */
    @Override
    public List<Object[]> collectResultInRow(BlockletScannedResult scannedResult, int batchSize) {
      // scan the record and add to list
      List<Object[]> listBasedResult = new ArrayList<>(batchSize);
      int rowCounter = 0;
      int[] surrogateResult;
      byte[][] noDictionaryKeys;
      byte[][] complexTypeKeyArray;
      Map<Integer, GenericQueryType> complexDimensionInfoMap =
          executionInfo.getComplexDimensionInfoMap();
      while (scannedResult.hasNext() && rowCounter < batchSize) {
        scannedResult.incrementCounter();
        if (scannedResult.containsDeletedRow(scannedResult.getCurrentRowId())) {
          continue;
        }
        Object[] row = new Object[queryDimensions.length + queryMeasures.length];
        if (isDimensionExists) {
          surrogateResult = scannedResult.getDictionaryKeyIntegerArray();
          noDictionaryKeys = scannedResult.getNoDictionaryKeyArray();
          complexTypeKeyArray = scannedResult.getComplexTypeKeyArray();
          dictionaryColumnIndex = 0;
          noDictionaryColumnIndex = 0;
          complexTypeColumnIndex = 0;
          int segmentDimensionsIdx = 0;
          for (int i = 0; i < queryDimensions.length; i++) {
            // fill default value in case the dimension does not exist in the current block
            if (!dimensionInfo.getDimensionExists()[i]) {
              if (queryDimensions[i].getDimension().getDataType() == DataTypes.DATE) {
                row[order[i]] = dimensionInfo.getDefaultValues()[i];
                dictionaryColumnIndex++;
              } else if (queryDimensions[i].getDimension().getDataType() == DataTypes.STRING) {
                row[order[i]] = DataTypeUtil.getDataTypeConverter().convertFromByteToUTF8String(
                    (byte[])dimensionInfo.getDefaultValues()[i]);
              } else {
                row[order[i]] = dimensionInfo.getDefaultValues()[i];
              }
              continue;
            }
            fillDimensionData(scannedResult, surrogateResult, noDictionaryKeys, complexTypeKeyArray,
                complexDimensionInfoMap, row, i, executionInfo
                    .getProjectionDimensions()[segmentDimensionsIdx++].getDimension().getOrdinal());
          }
        }
        fillMeasureData(scannedResult, row);
        listBasedResult.add(row);
        rowCounter++;
      }
      return listBasedResult;
    }
  
    protected void fillMeasureData(Object[] msrValues, int offset,
        BlockletScannedResult scannedResult) {
      int measureExistIndex = 0;
      for (short i = 0; i < measureInfo.getMeasureDataTypes().length; i++) {
        // if measure exists is block then pass measure column
        // data chunk to the collector
        if (measureInfo.getMeasureExists()[i]) {
          ProjectionMeasure queryMeasure = executionInfo.getProjectionMeasures()[measureExistIndex];
          msrValues[i + offset] = getMeasureData(
              scannedResult.getMeasureChunk(measureInfo.getMeasureOrdinals()[measureExistIndex]),
              scannedResult.getCurrentRowId(), queryMeasure.getMeasure());
          measureExistIndex++;
        } else if (DataTypes.isDecimal(measureInfo.getMeasureDataTypes()[i])) {
          // if not then get the default value
          msrValues[i + offset] = DataTypeUtil.getDataTypeConverter()
              .convertFromBigDecimalToDecimal(measureDefaultValues[i]);
        } else {
          msrValues[i + offset] = measureDefaultValues[i];
        }
      }
    }
  
  }
  