statelesssessionimpl.java

hibernate-3.1.3-all-src.zip 面向对象的访问数据库工具

//$Id: StatelessSessionImpl.java 9240 2006-02-08 22:47:34Z steveebersole $
package org.hibernate.impl;

import java.io.Serializable;
import java.sql.Connection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.hibernate.CacheMode;
import org.hibernate.ConnectionReleaseMode;
import org.hibernate.Criteria;
import org.hibernate.EmptyInterceptor;
import org.hibernate.EntityMode;
import org.hibernate.FlushMode;
import org.hibernate.HibernateException;
import org.hibernate.Interceptor;
import org.hibernate.LockMode;
import org.hibernate.MappingException;
import org.hibernate.ScrollMode;
import org.hibernate.ScrollableResults;
import org.hibernate.SessionException;
import org.hibernate.StatelessSession;
import org.hibernate.Transaction;
import org.hibernate.collection.PersistentCollection;
import org.hibernate.engine.EntityKey;
import org.hibernate.engine.PersistenceContext;
import org.hibernate.engine.QueryParameters;
import org.hibernate.engine.StatefulPersistenceContext;
import org.hibernate.engine.Versioning;
import org.hibernate.engine.query.HQLQueryPlan;
import org.hibernate.event.EventListeners;
import org.hibernate.id.IdentifierGeneratorFactory;
import org.hibernate.jdbc.Batcher;
import org.hibernate.jdbc.JDBCContext;
import org.hibernate.loader.criteria.CriteriaLoader;
import org.hibernate.loader.custom.CustomLoader;
import org.hibernate.loader.custom.CustomQuery;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.persister.entity.OuterJoinLoadable;
import org.hibernate.proxy.HibernateProxy;
import org.hibernate.type.Type;
import org.hibernate.util.CollectionHelper;

/**
 * @author Gavin King
 */
public class StatelessSessionImpl extends AbstractSessionImpl
		implements JDBCContext.Context, StatelessSession {
	
	private JDBCContext jdbcContext;
	
	StatelessSessionImpl(
			Connection connection, 
			SessionFactoryImpl factory
	) {
		super(factory);
		this.jdbcContext = new JDBCContext( this, connection, EmptyInterceptor.INSTANCE );
	}

	public boolean isOpen() {
		return !isClosed();
	}

	public void close() {
		managedClose();
	}
	
	public void delete(Object entity) {
		errorIfClosed();
		delete(null, entity);
	}

	public Serializable insert(Object entity) {
		errorIfClosed();
		return insert(null, entity);
	}

	public void update(Object entity) {
		errorIfClosed();
		update(null, entity);
	}

	public Serializable insert(String entityName, Object entity) {
		errorIfClosed();
		EntityPersister persister = getEntityPersister(entityName, entity);
		Serializable id = persister.getIdentifierGenerator().generate(this, entity);
		Object[] state = persister.getPropertyValues(entity, EntityMode.POJO);
		if ( persister.isVersioned() ) {
			boolean substitute = Versioning.seedVersion(state, persister.getVersionProperty(), persister.getVersionType(), this);
			if (substitute) persister.setPropertyValues(entity, state, EntityMode.POJO);
		}
		if ( id == IdentifierGeneratorFactory.POST_INSERT_INDICATOR ) {
			id = persister.insert(state, entity, this);
		}
		else {
			persister.insert(id, state, entity, this);			
		}
		persister.setIdentifier(entity, id, EntityMode.POJO);
		return id;
	}
	
	public void update(String entityName, Object entity) {
		errorIfClosed();
		EntityPersister persister = getEntityPersister(entityName, entity);
		Serializable id = persister.getIdentifier(entity, EntityMode.POJO);
		Object[] state = persister.getPropertyValues(entity, EntityMode.POJO);
		Object oldVersion;
		if ( persister.isVersioned() ) {
			oldVersion = persister.getVersion(entity, EntityMode.POJO);
			Object newVersion = Versioning.increment( oldVersion, persister.getVersionType(), this );
			Versioning.setVersion(state, newVersion, persister);
			persister.setPropertyValues(entity, state, EntityMode.POJO);
		}
		else {
			oldVersion = null;
		}
		persister.update(id, state, null, false, null, oldVersion, entity, null, this);
	}
	
	public void delete(String entityName, Object entity) {
		errorIfClosed();
		EntityPersister persister = getEntityPersister(entityName, entity);
		Serializable id = persister.getIdentifier(entity, EntityMode.POJO);
		Object version = persister.getVersion(entity, EntityMode.POJO);
		persister.delete(id, version, entity, this);
	}

	public ConnectionReleaseMode getConnectionReleaseMode() {
		return factory.getSettings().getConnectionReleaseMode();
	}

	public boolean isAutoCloseSessionEnabled() {
		return factory.getSettings().isAutoCloseSessionEnabled();
	}

	public boolean isFlushBeforeCompletionEnabled() {
		return true;
	}

	public boolean isFlushModeNever() {
		return false;
	}

	public void managedClose() {
		if ( isClosed() ) {
			throw new SessionException( "Session was already closed!" );
		}
		jdbcContext.getConnectionManager().close();
		setClosed();
	}

	public void managedFlush() {
		errorIfClosed();
		getBatcher().executeBatch();
	}

	public boolean shouldAutoClose() {
		return isAutoCloseSessionEnabled() && !isClosed();
	}

	public void afterTransactionCompletion(boolean successful, Transaction tx) {}

	public void beforeTransactionCompletion(Transaction tx) {}

	public String bestGuessEntityName(Object object) {
		if (object instanceof HibernateProxy) {
			object = ( (HibernateProxy) object ).getHibernateLazyInitializer().getImplementation();
		}
		return guessEntityName(object);
	}

	public Connection connection() {
		errorIfClosed();
		return jdbcContext.borrowConnection();
	}

	public int executeUpdate(String query, QueryParameters queryParameters) 
	throws HibernateException {
		errorIfClosed();
		queryParameters.validateParameters();
		HQLQueryPlan plan = getHQLQueryPlan( query, false );
		boolean success = false;
		int result = 0;
		try {
			result = plan.performExecuteUpdate( queryParameters, this );
			success = true;
		}
		finally {
			afterOperation(success);
		}
		temporaryPersistenceContext.clear();
		return result;
	}

	public Batcher getBatcher() {
		errorIfClosed();
		return jdbcContext.getConnectionManager()
				.getBatcher();
	}

	public CacheMode getCacheMode() {
		return CacheMode.IGNORE;
	}

	public int getDontFlushFromFind() {
		return 0;
	}

	public Map getEnabledFilters() {
		return CollectionHelper.EMPTY_MAP;
	}

	public Serializable getContextEntityIdentifier(Object object) {
		errorIfClosed();
		return null;
	}

	public EntityMode getEntityMode() {
		return EntityMode.POJO;
	}

	public EntityPersister getEntityPersister(String entityName, Object object) 
	throws HibernateException {
		errorIfClosed();
		if (entityName==null) {
			return factory.getEntityPersister( guessEntityName(object) );
		}
		else {
			return factory.getEntityPersister( entityName )
					.getSubclassEntityPersister( object, getFactory(), EntityMode.POJO );
		}
	}

	public Object getEntityUsingInterceptor(EntityKey key) throws HibernateException {
		errorIfClosed();
		return null;
	}

	public Type getFilterParameterType(String filterParameterName) {
		throw new UnsupportedOperationException();
	}

	public Object getFilterParameterValue(String filterParameterName) {
		throw new UnsupportedOperationException();
	}

	public FlushMode getFlushMode() {
		return FlushMode.COMMIT;
	}

	public Interceptor getInterceptor() {
		return EmptyInterceptor.INSTANCE;
	}

	public EventListeners getListeners() {
		throw new UnsupportedOperationException();
	}

	public PersistenceContext getPersistenceContext() {
		return temporaryPersistenceContext;
	}

	public long getTimestamp() {
		throw new UnsupportedOperationException();