Method exec

tutorial/src/org/apache/pig/tutorial/ToLower.java:36–46

(Tuple input)

 */
public class ToLower extends EvalFunc<String> {
    public String exec(Tuple input) throws IOException {
        if(input == null || input.size() == 0)
            return null;
        try{
            String query = (String)input.get(0);
            return query.toLowerCase().trim();
        }catch(Exception e){
            System.err.println("ToLower: failed to process input; error - " + e.getMessage());
            return null;
        }
    }

    @Override
    /**