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  package org.apache.cayenne.access.jdbc.reader;
  
  import java.sql.ResultSet;
  
  import org.apache.cayenne.access.jdbc.ColumnDescriptor;
  import org.apache.cayenne.access.jdbc.RowDescriptor;
  import org.apache.cayenne.access.types.ExtendedType;
  import org.apache.cayenne.map.ObjEntity;
  import org.apache.cayenne.query.QueryMetadata;
  
  /**
   * @since 3.0
   */
  abstract class BaseRowReader<T> implements RowReader<T> {
  
      ExtendedType[] converters;
      String[] labels;
      int[] types;
      DataRowPostProcessor postProcessor;
      String entityName;
  
      BaseRowReader(RowDescriptor descriptor, QueryMetadata queryMetadata, DataRowPostProcessor postProcessor) {
          ObjEntity rootObjEntity = queryMetadata.getObjEntity();
          if (rootObjEntity != null) {
              this.entityName = rootObjEntity.getName();
          }
  
          this.postProcessor = postProcessor;
          this.converters = descriptor.getConverters();
  
          ColumnDescriptor[] columns = descriptor.getColumns();
          int width = columns.length;
          this.labels = new String[width];
          this.types = new int[width];
  
          for (int i = 0; i < width; i++) {
              labels[i] = columns[i].getDataRowKey();
              types[i] = columns[i].getJdbcType();
          }
      }
  
      @Override
      public abstract T readRow(ResultSet resultSet);
  
  }
  