Simple jsf toplink example question

Question

the jsf-toplink example http://www.oracle.com/technology/products/jdev/101/howtos/jsftoplink/index.html
is very helpful. Can anyone tell me how I can move from this example's selection of the employees table to a selection of the employees table with criteria (i.e., WHERE clause)?

Answer 1

Perhaps you could change the getEmployees method to use a bean attribute "firstNameClause" which is bound to an Input Text component (where the user could enter "Mi%", for example, to find employees with first name starting with "Mi"):
public Vector getEmployees()
oracle.toplink.sessions.Project project = XMLProjectReader.read("path-to-your-toplink-deployment-descriptor.xml");
DatabaseSession session = project.createDatabaseSession();
session.login();
ExpressionBuilder builder = new ExpressionBuilder();
Expression expression = builder.get("firstName").like((String)getFirstNameClause().getValue());
Vector objects = session.readAllObjects(jsftoplink.model.Employees.class, expression);
return objects;
}