package io.druid.data.input;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Maps;
import com.metamx.common.ISE;

import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

/**
 */
public class Rows
{
  public static InputRow toCaseInsensitiveInputRow(final Row row, final List<String> dimensions)
  {
    if (row instanceof MapBasedRow) {
      MapBasedRow mapBasedRow = (MapBasedRow) row;

      TreeMap<String, Object> caseInsensitiveMap = Maps.newTreeMap(String.CASE_INSENSITIVE_ORDER);
      caseInsensitiveMap.putAll(mapBasedRow.getEvent());
      return new MapBasedInputRow(
          mapBasedRow.getTimestampFromEpoch(),
          dimensions,
          caseInsensitiveMap
      );
    }
    throw new ISE("Can only convert MapBasedRow objects because we are ghetto like that.");
  }

  /**
   * @param timeStamp rollup up timestamp to be used to create group key
   * @param inputRow input row
   * @return groupKey for the given input row
   */
  public static List<Object> toGroupKey(long timeStamp, InputRow inputRow)
  {
    final Map<String, Set<String>> dims = Maps.newTreeMap();
    for (final String dim : inputRow.getDimensions()) {
      final Set<String> dimValues = ImmutableSortedSet.copyOf(inputRow.getDimension(dim));
      if (dimValues.size() > 0) {
        dims.put(dim, dimValues);
      }
    }
    return ImmutableList.of(
        timeStamp,
        dims
    );
  }
}

@@ -1353,16 +1353,30 @@
 sion(dim
+.toLowerCase()
 ));%0A    

fix casing issue while generating groupKey