/**
* Creates a new expression that joins this object with another expression, using specified join
* type. It is very useful for incrementally building chained expressions, like long AND or OR
* statements.
*/
public Expression joinExp(int type, Expression exp) {
Expression join = ExpressionFactory.expressionOfType(type);
join.setOperand(0, this);
join.setOperand(1, exp);
join.flattenTree();
return join;
}
