Package org.hibernate.loader.collection

Source Code of org.hibernate.loader.collection.OneToManyLoader

//$Id: OneToManyLoader.java 7123 2005-06-13 20:10:20Z oneovthafew $
package org.hibernate.loader.collection;

import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.MappingException;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.loader.JoinWalker;
import org.hibernate.persister.collection.QueryableCollection;

/**
* Loads one-to-many associations<br>
* <br>
* The collection persister must implement <tt>QueryableCOllection<tt>. For
* other collections, create a customized subclass of <tt>Loader</tt>.
*
* @see BasicCollectionLoader
* @author Gavin King
*/
public class OneToManyLoader extends CollectionLoader {

  private static final Logger log = LoggerFactory.getLogger(OneToManyLoader.class);

  public OneToManyLoader(
      QueryableCollection oneToManyPersister,
      SessionFactoryImplementor session,
      Map enabledFilters)
  throws MappingException {
    this(oneToManyPersister, 1, session, enabledFilters);
  }

  public OneToManyLoader(
      QueryableCollection oneToManyPersister,
      int batchSize,
      SessionFactoryImplementor factory,
      Map enabledFilters)
  throws MappingException {
    this(oneToManyPersister, batchSize, null, factory, enabledFilters);
  }

  public OneToManyLoader(
      QueryableCollection oneToManyPersister,
      int batchSize,
      String subquery,
      SessionFactoryImplementor factory,
      Map enabledFilters)
  throws MappingException {

    super(oneToManyPersister, factory, enabledFilters);
   
    JoinWalker walker = new OneToManyJoinWalker(
        oneToManyPersister,
        batchSize,
        subquery,
        factory,
        enabledFilters
      );
    initFromWalker( walker );

    postInstantiate();

    log.debug( "Static select for one-to-many " + oneToManyPersister.getRole() + ": " + getSQLString() );
  }

}
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