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Fix ClassCastException in ColumnGenerator causing queries to silently fail #20

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Merged
sanketmehta28 merged 1 commit into from
Feb 25, 2026
Merged

Fix ClassCastException in ColumnGenerator causing queries to silently fail #20

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29 changes: 7 additions & 22 deletions src/main/java/com/appdynamics/extensions/sql/ColumnGenerator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,37 +9,22 @@

import com.appdynamics.extensions.util.AssertUtils;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Strings;
import com.google.common.collect.Maps;

import java.util.List;
import java.util.Map;

/**
* Created by bhuvnesh.kumar on 10/5/17.
*/
public class ColumnGenerator {

public List<Column> getColumns(Map query) {
AssertUtils.assertNotNull(query.get("columns"),"Queries need to have columns configured.");

Map<String, Map<String, String>> filter = Maps.newLinkedHashMap();
filter = filterMap(query, "columns");
final ObjectMapper mapper = new ObjectMapper(); // jackson’s objectmapper
final Columns columns = mapper.convertValue(filter, Columns.class);
return columns.getColumns();
}
Object columnsObj = query.get("columns");
AssertUtils.assertNotNull(columnsObj, "Queries need to have columns configured.");

private Map<String, Map<String, String>> filterMap( Map<String, Map<String, String>> mapOfMaps, String filterKey) {
Map<String, Map<String, String>> filteredOnKeyMap = Maps.newLinkedHashMap();
Map<String, Object> wrapper = Maps.newLinkedHashMap();
wrapper.put("columns", columnsObj);

if (Strings.isNullOrEmpty(filterKey))
return filteredOnKeyMap;

if (mapOfMaps.containsKey(filterKey)) {
filteredOnKeyMap.put(filterKey,mapOfMaps.get(filterKey));
}

return filteredOnKeyMap;
final ObjectMapper mapper = new ObjectMapper();
final Columns columns = mapper.convertValue(wrapper, Columns.class);
return columns.getColumns();
}
}