gistfile1.txt

public class HbaseLookup {
    static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TrigoMathFunctions.class);

    private HbaseLookup(){}

    @FunctionTemplate(name = "hLookup", scope = FunctionScope.SIMPLE, nulls = NullHandling.NULL_IF_NULL)
    public static class Lookup implements DrillSimpleFunc {

        @Param VarCharHolder table;                // the table to read from
        @Param VarCharHolder columns;              // which columns to retrieve, comma-delimited
        @Param VarCharHolder key;                  // the key to read
        @Output BaseWriter.ComplexWriter writer;

        public void setup(RecordBatch b) {
            StringBuilder out = new StringBuilder();
            for (int i = table.start; i < table.end; i++) {
                out.append(table.buffer.getChar(i));
            }
            System.out.printf("table = %s\n", out);
            out = new StringBuilder();
            for (int i = table.start; i < table.end; i++) {
                out.append(columns.buffer.getChar(i));
            }
            System.out.printf("columns = %s\n", out);
        }

        public void eval() {
            System.out.printf("key = %s\n", key.toString());
        }
    }


}