void addNamedJoinColumnExpression(String name, Expression e) {
if (namedJoinColumnExpressions == null) {
namedJoinColumnExpressions = new HashMap();
}
namedJoinColumnExpressions.put(name, e);
}
public void addResource(Xid xid, JDBCXAResource xaResource) {
resources.put(xid, xaResource);
}