Examples of org.apache.ojb.broker.accesslayer.RsIterator

org.apache.ojb.broker.accesslayer.RsIterator

RsIterator can be used to iterate over a jdbc ResultSet to retrieve persistent objects step-by-step and not all at once. In fact the PersistenceBroker::getCollectionByQuery(...) method uses a RsIterator internally to build up a Collection of objects

NOTE: OJB is very strict in handling RsIterator instances. RsIterator is bound very closely to the used {@link org.apache.ojb.broker.PersistenceBroker} instance.Thus if you do a
- {@link org.apache.ojb.broker.PersistenceBroker#close}
- {@link org.apache.ojb.broker.PersistenceBroker#commitTransaction}
- {@link org.apache.ojb.broker.PersistenceBroker#abortTransaction}
call, the current RsIterator instance resources will be cleaned up automatic and invalidate current instance.

NOTE: this code uses features that only JDBC 2.0 compliant Drivers support. It will NOT work with JDBC 1.0 Drivers (e.g. SUN's JdbcOdbcDriver) If you are forced to use such a driver, you can use code from the 0.1.30 release.

@author Thomas Mahler @author Matthew Baird - added thesupport for extents mapped to single table - added the .size functionality - added cursor control @version $Id: RsIterator.java,v 1.63.2.19 2005/12/21 22:22:58 tomdz Exp $

  /**
   * @see org.apache.ojb.broker.core.RsIteratorFactory#createRsIterator(Query, ClassDescriptor, PersistenceBrokerImpl)
   */
  public RsIterator createRsIterator(Query query, ClassDescriptor cld, PersistenceBrokerImpl broker)
  {
    return new RsIterator(RsQueryObject.get(cld, query), broker);
  }

  /**
   * @see org.apache.ojb.broker.core.RsIteratorFactory#createRsIterator(Query, ClassDescriptor, PersistenceBrokerImpl)
   */
  public RsIterator createRsIterator(Query query, ClassDescriptor cld, PersistenceBrokerImpl broker)
  {
    return new RsIterator(RsQueryObject.get(cld, query), broker);
  }

Examples of org.apache.ojb.broker.accesslayer.RsIterator

Related Classes of org.apache.ojb.broker.accesslayer.RsIterator