kodo.jdbc.query
Interface JDBCAggregateListener

All Superinterfaces:

AggregateListener, Serializable

public interface JDBCAggregateListener

extends AggregateListener

JDBC extension to the AggregateListener.

Method Summary

int	select(SQLBuffer buf, JDBCValue arg, ClassMapping mapping, KodoPersistenceManager pm) Append the SQL for this expression or value.

Methods inherited from interface kodo.query.AggregateListener

evaluate, expectsArgument, getTag

Method Detail

select

public int select(SQLBuffer buf,
                  JDBCValue arg,
                  ClassMapping mapping,
                  KodoPersistenceManager pm)

Append the SQL for this expression or value.

Parameters:

buf - the SQL buffer to append to

arg - the value of the argument given in the filter; this will usually be a SQLPath, but will be null if this listener doesn't expect an argument

mapping - the class mapping for the query's candidate class

pm - the persistence manager that owns the query

Returns:

the TYPE_* constant from JDBCTypes indicating the expected return value of this aggregate, or -1 if unknown