com.avaje.ebean

Interface QueryResultVisitor<T>

Type Parameters:

T - the type of entity bean being queried.

public interface QueryResultVisitor<T>

Used to process a query result one bean at a time via a callback to this visitor.

If you wish to stop further processing return false from the accept method.

Unlike findList() and findSet() using a QueryResultVisitor does not require all the beans in the query result to be held in memory at once. This makes QueryResultVisitor useful for processing large queries.

 
 Query<Customer> query = server.find(Customer.class)
     .fetch("contacts", new FetchConfig().query(2))
     .where().gt("id", 0)
     .orderBy("id")
     .setMaxRows(2);
 
 query.findVisit(new QueryResultVisitor<Customer>() {
 
   public boolean accept(Customer customer) {
     // do something with customer
     System.out.println("-- visit " + customer);
     return true;
   }
 });
 

Author:

rbygrave

Method Summary

Methods

Modifier and Type	Method and Description
boolean	accept(T bean) Process the bean and return true if you want to continue processing more beans.

Method Detail

accept

boolean accept(T bean)

Process the bean and return true if you want to continue processing more beans. Return false if you want to stop processing further.

Parameters:

bean - the entity bean to process

Returns:

true to continue processing or false to stop.