outerjoinloader.java

hibernate-distribution-3.3.1.GA-dist.zip源码

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 *
 */
package org.hibernate.loader;

import java.util.Map;

import org.hibernate.LockMode;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.persister.collection.CollectionPersister;
import org.hibernate.persister.entity.Loadable;
import org.hibernate.type.EntityType;

/**
 * Implements logic for walking a tree of associated classes.
 *
 * Generates an SQL select string containing all properties of those classes.
 * Tables are joined using an ANSI-style left outer join.
 *
 * @author Gavin King
 */
public abstract class OuterJoinLoader extends BasicLoader {

	protected Loadable[] persisters;
	protected CollectionPersister[] collectionPersisters;
	protected int[] collectionOwners;
	protected String[] aliases;
	protected LockMode[] lockModeArray;
	protected int[] owners;
	protected EntityType[] ownerAssociationTypes;
	protected String sql;
	protected String[] suffixes;
	protected String[] collectionSuffixes;

    private Map enabledFilters;
    
    protected final Dialect getDialect() {
    	return getFactory().getDialect();
    }

	public OuterJoinLoader(SessionFactoryImplementor factory, Map enabledFilters) {
		super(factory);
		this.enabledFilters = enabledFilters;
	}

	protected String[] getSuffixes() {
		return suffixes;
	}

	protected String[] getCollectionSuffixes() {
		return collectionSuffixes;
	}

	protected final String getSQLString() {
		return sql;
	}

	protected final Loadable[] getEntityPersisters() {
		return persisters;
	}

	protected int[] getOwners() {
		return owners;
	}

	protected EntityType[] getOwnerAssociationTypes() {
		return ownerAssociationTypes;
	}

	protected LockMode[] getLockModes(Map lockModes) {
		return lockModeArray;
	}
	
	public Map getEnabledFilters() {
		return enabledFilters;
	}

	protected final String[] getAliases() {
		return aliases;
	}

	protected final CollectionPersister[] getCollectionPersisters() {
		return collectionPersisters;
	}

	protected final int[] getCollectionOwners() {
		return collectionOwners;
	}

	protected void initFromWalker(JoinWalker walker) {
		persisters = walker.getPersisters();
		collectionPersisters = walker.getCollectionPersisters();
		ownerAssociationTypes = walker.getOwnerAssociationTypes();
		lockModeArray = walker.getLockModeArray();
		suffixes = walker.getSuffixes();
		collectionSuffixes = walker.getCollectionSuffixes();
		owners = walker.getOwners();
		collectionOwners = walker.getCollectionOwners();
		sql = walker.getSQLString();
		aliases = walker.getAliases();
	}

}