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.converter.impl;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.carbondata.common.logging.LogServiceFactory;
  import org.apache.carbondata.core.constants.CarbonCommonConstants;
  import org.apache.carbondata.core.datastore.row.CarbonRow;
  import org.apache.carbondata.core.util.CustomIndex;
  import org.apache.carbondata.processing.loading.CarbonDataLoadConfiguration;
  import org.apache.carbondata.processing.loading.DataField;
  import org.apache.carbondata.processing.loading.converter.BadRecordLogHolder;
  import org.apache.carbondata.processing.loading.exception.CarbonDataLoadingException;
  
  import org.apache.log4j.Logger;
  
  /**
   * Converter for spatial index columns
   */
  public class SpatialIndexFieldConverterImpl extends MeasureFieldConverterImpl {
    private static final Logger LOGGER =
        LogServiceFactory.getLogService(MeasureFieldConverterImpl.class.getName());
    private int index;
    private int[] sourceIndexes;
    CustomIndex instance;
  
    public SpatialIndexFieldConverterImpl(DataField dataField, String nullFormat, int index,
        boolean isEmptyBadRecord, CarbonDataLoadConfiguration configuration) {
      super(dataField, nullFormat, index, isEmptyBadRecord);
      this.index = index;
      Map<String, String> properties =
          configuration.getTableSpec().getCarbonTable().getTableInfo().getFactTable()
              .getTableProperties();
      try {
        instance = CustomIndex.getCustomInstance(properties.get(
            CarbonCommonConstants.SPATIAL_INDEX + "." + dataField.getColumn().getColName()
                + ".instance"));
      } catch (IOException e) {
        LOGGER.error("Failed to get the custom instance", e);
        throw new RuntimeException(e);
      }
      String sourceColumns = properties.get(
          CarbonCommonConstants.SPATIAL_INDEX + "." + dataField.getColumn().getColName()
              + ".sourcecolumns");
      String[] sources = sourceColumns.split(",");
      sourceIndexes = new int[sources.length];
      int idx = 0;
      for (String source : sources) {
        sourceIndexes[idx++] = getDataFieldIndexByName(configuration.getDataFields(), source);
      }
    }
  
    private int getDataFieldIndexByName(DataField[] fields, String column) {
      for (int i = 0; i < fields.length; i++) {
        if (fields[i].getColumn().getColName().equalsIgnoreCase(column)) {
          return i;
        }
      }
      return -1;
    }
  
    private String generateIndexValue(CarbonRow row) {
      List<Object> sourceValues = new ArrayList<Object>();
      for (int sourceIndex : sourceIndexes) {
        sourceValues.add(row.getData()[sourceIndex]);
      }
      String value = null;
      try {
        value = instance.generate(sourceValues);
      } catch (Exception e) {
        LOGGER.error("Failed to generate index column value", e);
      }
      return value;
    }
  
    @Override
    public void convert(CarbonRow row, BadRecordLogHolder logHolder)
        throws CarbonDataLoadingException {
      if (row.getData()[index] == null) {
        row.update(generateIndexValue(row), index);
      }
      super.convert(row, logHolder);
    }
  }
  