Toplink query question

[tom62]

I wonder if someone could tell me when to use Query Objects or basic session querying with Toplink. What are the advantages of using Query Objects (if there are any)?

Thanks in advance for your reply,

Tom.


Example code with Query Object:

ExpressionBuilder eb = new ExpressionBuilder(MyClass.class);
Expression exp1 = eb.get("name&quot.equal("Browne"
Expression exp2 = eb.get("city&quot.equal("London"
Expression exp = exp1.and(exp2);

ReadAllQuery q = new ReadAllQuery(MyClass.class);
q.setSelectionCriteria(exp);

Vector result = (Vector)session.executeQuery(q);

Example code with basic session querying:

ExpressionBuilder eb = new ExpressionBuilder(MyClass.class);
Expression exp1 = eb.get("name&quot.equal("Browne"
Expression exp2 = eb.get("city&quot.equal("London"
Expression exp = exp1.and(exp2);
Vector result = (Vector)session.readAllObjects(MyClass.class, exp);