AGet getA = new AGet();
getA.row = rowAname;
Schema columnsSchema = Schema.createArray(AColumn.SCHEMA$);
GenericArray<AColumn> columns = new GenericData.Array<AColumn>(1, columnsSchema);
AColumn column = new AColumn();
column.family = familyAname;
column.qualifier = qualifierAname;
columns.add(column);
getA.columns = columns;