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    1   /*
    2    * Copyright 2002-2009 the original author or authors.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *      http://www.apache.org/licenses/LICENSE-2.0
    9    *
   10    * Unless required by applicable law or agreed to in writing, software
   11    * distributed under the License is distributed on an "AS IS" BASIS,
   12    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   13    * See the License for the specific language governing permissions and
   14    * limitations under the License.
   15    */
   16   
   17   package org.springframework.orm.hibernate3;
   18   
   19   import java.io.Serializable;
   20   import java.lang.reflect.InvocationHandler;
   21   import java.lang.reflect.InvocationTargetException;
   22   import java.lang.reflect.Method;
   23   import java.lang.reflect.Proxy;
   24   import java.sql.SQLException;
   25   import java.util.Collection;
   26   import java.util.Iterator;
   27   import java.util.List;
   28   
   29   import org.hibernate.Criteria;
   30   import org.hibernate.Filter;
   31   import org.hibernate.FlushMode;
   32   import org.hibernate.Hibernate;
   33   import org.hibernate.HibernateException;
   34   import org.hibernate.LockMode;
   35   import org.hibernate.Query;
   36   import org.hibernate.ReplicationMode;
   37   import org.hibernate.Session;
   38   import org.hibernate.SessionFactory;
   39   import org.hibernate.criterion.DetachedCriteria;
   40   import org.hibernate.criterion.Example;
   41   import org.hibernate.engine.SessionImplementor;
   42   import org.hibernate.event.EventSource;
   43   
   44   import org.springframework.dao.DataAccessException;
   45   import org.springframework.dao.DataAccessResourceFailureException;
   46   import org.springframework.dao.InvalidDataAccessApiUsageException;
   47   import org.springframework.util.Assert;
   48   
   49   /**
   50    * Helper class that simplifies Hibernate data access code. Automatically
   51    * converts HibernateExceptions into DataAccessExceptions, following the
   52    * <code>org.springframework.dao</code> exception hierarchy.
   53    *
   54    * <p>The central method is <code>execute</code>, supporting Hibernate access code
   55    * implementing the {@link HibernateCallback} interface. It provides Hibernate Session
   56    * handling such that neither the HibernateCallback implementation nor the calling
   57    * code needs to explicitly care about retrieving/closing Hibernate Sessions,
   58    * or handling Session lifecycle exceptions. For typical single step actions,
   59    * there are various convenience methods (find, load, saveOrUpdate, delete).
   60    *
   61    * <p>Can be used within a service implementation via direct instantiation
   62    * with a SessionFactory reference, or get prepared in an application context
   63    * and given to services as bean reference. Note: The SessionFactory should
   64    * always be configured as bean in the application context, in the first case
   65    * given to the service directly, in the second case to the prepared template.
   66    *
   67    * <p><b>NOTE: As of Hibernate 3.0.1, transactional Hibernate access code can
   68    * also be coded in plain Hibernate style. Hence, for newly started projects,
   69    * consider adopting the standard Hibernate3 style of coding data access objects
   70    * instead, based on {@link org.hibernate.SessionFactory#getCurrentSession()}.</b>
   71    *
   72    * <p>This class can be considered as direct alternative to working with the raw
   73    * Hibernate3 Session API (through <code>SessionFactory.getCurrentSession()</code>).
   74    * The major advantage is its automatic conversion to DataAccessExceptions as well
   75    * as its capability to fall back to 'auto-commit' style behavior when used outside
   76    * of transactions. <b>Note that HibernateTemplate will perform its own Session
   77    * management, not participating in a custom Hibernate CurrentSessionContext
   78    * unless you explicitly switch {@link #setAllowCreate "allowCreate"} to "false".</b>
   79    *
   80    * <p>{@link LocalSessionFactoryBean} is the preferred way of obtaining a reference
   81    * to a specific Hibernate SessionFactory, at least in a non-EJB environment.
   82    * The Spring application context will manage its lifecycle, initializing and
   83    * shutting down the factory as part of the application.
   84    *
   85    * <p>Note that operations that return an Iterator (i.e. <code>iterate</code>)
   86    * are supposed to be used within Spring-driven or JTA-driven transactions
   87    * (with HibernateTransactionManager, JtaTransactionManager, or EJB CMT).
   88    * Else, the Iterator won't be able to read results from its ResultSet anymore,
   89    * as the underlying Hibernate Session will already have been closed.
   90    *
   91    * <p>Lazy loading will also just work with an open Hibernate Session,
   92    * either within a transaction or within OpenSessionInViewFilter/Interceptor.
   93    * Furthermore, some operations just make sense within transactions,
   94    * for example: <code>contains</code>, <code>evict</code>, <code>lock</code>,
   95    * <code>flush</code>, <code>clear</code>.
   96    *
   97    * @author Juergen Hoeller
   98    * @since 1.2
   99    * @see #setSessionFactory
  100    * @see HibernateCallback
  101    * @see org.hibernate.Session
  102    * @see LocalSessionFactoryBean
  103    * @see HibernateTransactionManager
  104    * @see org.springframework.transaction.jta.JtaTransactionManager
  105    * @see org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
  106    * @see org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor
  107    */
  108   public class HibernateTemplate extends HibernateAccessor implements HibernateOperations {
  109   
  110   	private boolean allowCreate = true;
  111   
  112   	private boolean alwaysUseNewSession = false;
  113   
  114   	private boolean exposeNativeSession = false;
  115   
  116   	private boolean checkWriteOperations = true;
  117   
  118   	private boolean cacheQueries = false;
  119   
  120   	private String queryCacheRegion;
  121   
  122   	private int fetchSize = 0;
  123   
  124   	private int maxResults = 0;
  125   
  126   
  127   	/**
  128   	 * Create a new HibernateTemplate instance.
  129   	 */
  130   	public HibernateTemplate() {
  131   	}
  132   
  133   	/**
  134   	 * Create a new HibernateTemplate instance.
  135   	 * @param sessionFactory SessionFactory to create Sessions
  136   	 */
  137   	public HibernateTemplate(SessionFactory sessionFactory) {
  138   		setSessionFactory(sessionFactory);
  139   		afterPropertiesSet();
  140   	}
  141   
  142   	/**
  143   	 * Create a new HibernateTemplate instance.
  144   	 * @param sessionFactory SessionFactory to create Sessions
  145   	 * @param allowCreate if a non-transactional Session should be created when no
  146   	 * transactional Session can be found for the current thread
  147   	 */
  148   	public HibernateTemplate(SessionFactory sessionFactory, boolean allowCreate) {
  149   		setSessionFactory(sessionFactory);
  150   		setAllowCreate(allowCreate);
  151   		afterPropertiesSet();
  152   	}
  153   
  154   
  155   	/**
  156   	 * Set if a new {@link Session} should be created when no transactional
  157   	 * <code>Session</code> can be found for the current thread.
  158   	 * The default value is <code>true</code>.
  159   	 * <p><code>HibernateTemplate</code> is aware of a corresponding
  160   	 * <code>Session</code> bound to the current thread, for example when using
  161   	 * {@link HibernateTransactionManager}. If <code>allowCreate</code> is
  162   	 * <code>true</code>, a new non-transactional <code>Session</code> will be
  163   	 * created if none is found, which needs to be closed at the end of the operation.
  164   	 * If <code>false</code>, an {@link IllegalStateException} will get thrown in
  165   	 * this case.
  166   	 * <p><b>NOTE: As of Spring 2.5, switching <code>allowCreate</code>
  167   	 * to <code>false</code> will delegate to Hibernate's
  168   	 * {@link org.hibernate.SessionFactory#getCurrentSession()} method,</b>
  169   	 * which - with Spring-based setup - will by default delegate to Spring's
  170   	 * <code>SessionFactoryUtils.getSession(sessionFactory, false)</code>.
  171   	 * This mode also allows for custom Hibernate CurrentSessionContext strategies
  172   	 * to be plugged in, whereas <code>allowCreate</code> set to <code>true</code>
  173   	 * will always use a Spring-managed Hibernate Session.
  174   	 * @see SessionFactoryUtils#getSession(SessionFactory, boolean)
  175   	 */
  176   	public void setAllowCreate(boolean allowCreate) {
  177   		this.allowCreate = allowCreate;
  178   	}
  179   
  180   	/**
  181   	 * Return if a new Session should be created if no thread-bound found.
  182   	 */
  183   	public boolean isAllowCreate() {
  184   		return this.allowCreate;
  185   	}
  186   
  187   	/**
  188   	 * Set whether to always use a new Hibernate Session for this template.
  189   	 * Default is "false"; if activated, all operations on this template will
  190   	 * work on a new Hibernate Session even in case of a pre-bound Session
  191   	 * (for example, within a transaction or OpenSessionInViewFilter).
  192   	 * <p>Within a transaction, a new Hibernate Session used by this template
  193   	 * will participate in the transaction through using the same JDBC
  194   	 * Connection. In such a scenario, multiple Sessions will participate
  195   	 * in the same database transaction.
  196   	 * <p>Turn this on for operations that are supposed to always execute
  197   	 * independently, without side effects caused by a shared Hibernate Session.
  198   	 */
  199   	public void setAlwaysUseNewSession(boolean alwaysUseNewSession) {
  200   		this.alwaysUseNewSession = alwaysUseNewSession;
  201   	}
  202   
  203   	/**
  204   	 * Return whether to always use a new Hibernate Session for this template.
  205   	 */
  206   	public boolean isAlwaysUseNewSession() {
  207   		return this.alwaysUseNewSession;
  208   	}
  209   
  210   	/**
  211   	 * Set whether to expose the native Hibernate Session to
  212   	 * HibernateCallback code.
  213   	 * <p>Default is "false": a Session proxy will be returned, suppressing
  214   	 * <code>close</code> calls and automatically applying query cache
  215   	 * settings and transaction timeouts.
  216   	 * @see HibernateCallback
  217   	 * @see org.hibernate.Session
  218   	 * @see #setCacheQueries
  219   	 * @see #setQueryCacheRegion
  220   	 * @see #prepareQuery
  221   	 * @see #prepareCriteria
  222   	 */
  223   	public void setExposeNativeSession(boolean exposeNativeSession) {
  224   		this.exposeNativeSession = exposeNativeSession;
  225   	}
  226   
  227   	/**
  228   	 * Return whether to expose the native Hibernate Session to
  229   	 * HibernateCallback code, or rather a Session proxy.
  230   	 */
  231   	public boolean isExposeNativeSession() {
  232   		return this.exposeNativeSession;
  233   	}
  234   
  235   	/**
  236   	 * Set whether to check that the Hibernate Session is not in read-only mode
  237   	 * in case of write operations (save/update/delete).
  238   	 * <p>Default is "true", for fail-fast behavior when attempting write operations
  239   	 * within a read-only transaction. Turn this off to allow save/update/delete
  240   	 * on a Session with flush mode NEVER.
  241   	 * @see #setFlushMode
  242   	 * @see #checkWriteOperationAllowed
  243   	 * @see org.springframework.transaction.TransactionDefinition#isReadOnly
  244   	 */
  245   	public void setCheckWriteOperations(boolean checkWriteOperations) {
  246   		this.checkWriteOperations = checkWriteOperations;
  247   	}
  248   
  249   	/**
  250   	 * Return whether to check that the Hibernate Session is not in read-only
  251   	 * mode in case of write operations (save/update/delete).
  252   	 */
  253   	public boolean isCheckWriteOperations() {
  254   		return this.checkWriteOperations;
  255   	}
  256   
  257   	/**
  258   	 * Set whether to cache all queries executed by this template.
  259   	 * <p>If this is "true", all Query and Criteria objects created by
  260   	 * this template will be marked as cacheable (including all
  261   	 * queries through find methods).
  262   	 * <p>To specify the query region to be used for queries cached
  263   	 * by this template, set the "queryCacheRegion" property.
  264   	 * @see #setQueryCacheRegion
  265   	 * @see org.hibernate.Query#setCacheable
  266   	 * @see org.hibernate.Criteria#setCacheable
  267   	 */
  268   	public void setCacheQueries(boolean cacheQueries) {
  269   		this.cacheQueries = cacheQueries;
  270   	}
  271   
  272   	/**
  273   	 * Return whether to cache all queries executed by this template.
  274   	 */
  275   	public boolean isCacheQueries() {
  276   		return this.cacheQueries;
  277   	}
  278   
  279   	/**
  280   	 * Set the name of the cache region for queries executed by this template.
  281   	 * <p>If this is specified, it will be applied to all Query and Criteria objects
  282   	 * created by this template (including all queries through find methods).
  283   	 * <p>The cache region will not take effect unless queries created by this
  284   	 * template are configured to be cached via the "cacheQueries" property.
  285   	 * @see #setCacheQueries
  286   	 * @see org.hibernate.Query#setCacheRegion
  287   	 * @see org.hibernate.Criteria#setCacheRegion
  288   	 */
  289   	public void setQueryCacheRegion(String queryCacheRegion) {
  290   		this.queryCacheRegion = queryCacheRegion;
  291   	}
  292   
  293   	/**
  294   	 * Return the name of the cache region for queries executed by this template.
  295   	 */
  296   	public String getQueryCacheRegion() {
  297   		return this.queryCacheRegion;
  298   	}
  299   
  300   	/**
  301   	 * Set the fetch size for this HibernateTemplate. This is important for processing
  302   	 * large result sets: Setting this higher than the default value will increase
  303   	 * processing speed at the cost of memory consumption; setting this lower can
  304   	 * avoid transferring row data that will never be read by the application.
  305   	 * <p>Default is 0, indicating to use the JDBC driver's default.
  306   	 */
  307   	public void setFetchSize(int fetchSize) {
  308   		this.fetchSize = fetchSize;
  309   	}
  310   
  311   	/**
  312   	 * Return the fetch size specified for this HibernateTemplate.
  313   	 */
  314   	public int getFetchSize() {
  315   		return this.fetchSize;
  316   	}
  317   
  318   	/**
  319   	 * Set the maximum number of rows for this HibernateTemplate. This is important
  320   	 * for processing subsets of large result sets, avoiding to read and hold
  321   	 * the entire result set in the database or in the JDBC driver if we're
  322   	 * never interested in the entire result in the first place (for example,
  323   	 * when performing searches that might return a large number of matches).
  324   	 * <p>Default is 0, indicating to use the JDBC driver's default.
  325   	 */
  326   	public void setMaxResults(int maxResults) {
  327   		this.maxResults = maxResults;
  328   	}
  329   
  330   	/**
  331   	 * Return the maximum number of rows specified for this HibernateTemplate.
  332   	 */
  333   	public int getMaxResults() {
  334   		return this.maxResults;
  335   	}
  336   
  337   
  338   	public <T> T execute(HibernateCallback<T> action) throws DataAccessException {
  339   		return doExecute(action, false, false);
  340   	}
  341   
  342   	public List executeFind(HibernateCallback<?> action) throws DataAccessException {
  343   		Object result = doExecute(action, false, false);
  344   		if (result != null && !(result instanceof List)) {
  345   			throw new InvalidDataAccessApiUsageException(
  346   					"Result object returned from HibernateCallback isn't a List: [" + result + "]");
  347   		}
  348   		return (List) result;
  349   	}
  350   
  351   	/**
  352   	 * Execute the action specified by the given action object within a
  353   	 * new {@link org.hibernate.Session}.
  354   	 * <p>This execute variant overrides the template-wide
  355   	 * {@link #isAlwaysUseNewSession() "alwaysUseNewSession"} setting.
  356   	 * @param action callback object that specifies the Hibernate action
  357   	 * @return a result object returned by the action, or <code>null</code>
  358   	 * @throws org.springframework.dao.DataAccessException in case of Hibernate errors
  359   	 */
  360   	public <T> T executeWithNewSession(HibernateCallback<T> action) {
  361   		return doExecute(action, true, false);
  362   	}
  363   
  364   	/**
  365   	 * Execute the action specified by the given action object within a
  366   	 * native {@link org.hibernate.Session}.
  367   	 * <p>This execute variant overrides the template-wide
  368   	 * {@link #isExposeNativeSession() "exposeNativeSession"} setting.
  369   	 * @param action callback object that specifies the Hibernate action
  370   	 * @return a result object returned by the action, or <code>null</code>
  371   	 * @throws org.springframework.dao.DataAccessException in case of Hibernate errors
  372   	 */
  373   	public <T> T executeWithNativeSession(HibernateCallback<T> action) {
  374   		return doExecute(action, false, true);
  375   	}
  376   
  377   	/**
  378   	 * Execute the action specified by the given action object within a Session.
  379   	 * @param action callback object that specifies the Hibernate action
  380   	 * @param enforceNewSession whether to enforce a new Session for this template
  381   	 * even if there is a pre-bound transactional Session
  382   	 * @param enforceNativeSession whether to enforce exposure of the native
  383   	 * Hibernate Session to callback code
  384   	 * @return a result object returned by the action, or <code>null</code>
  385   	 * @throws org.springframework.dao.DataAccessException in case of Hibernate errors
  386   	 */
  387   	protected <T> T doExecute(HibernateCallback<T> action, boolean enforceNewSession, boolean enforceNativeSession)
  388   			throws DataAccessException {
  389   
  390   		Assert.notNull(action, "Callback object must not be null");
  391   
  392   		Session session = (enforceNewSession ?
  393   				SessionFactoryUtils.getNewSession(getSessionFactory(), getEntityInterceptor()) : getSession());
  394   		boolean existingTransaction = (!enforceNewSession &&
  395   				(!isAllowCreate() || SessionFactoryUtils.isSessionTransactional(session, getSessionFactory())));
  396   		if (existingTransaction) {
  397   			logger.debug("Found thread-bound Session for HibernateTemplate");
  398   		}
  399   
  400   		FlushMode previousFlushMode = null;
  401   		try {
  402   			previousFlushMode = applyFlushMode(session, existingTransaction);
  403   			enableFilters(session);
  404   			Session sessionToExpose =
  405   					(enforceNativeSession || isExposeNativeSession() ? session : createSessionProxy(session));
  406   			T result = action.doInHibernate(sessionToExpose);
  407   			flushIfNecessary(session, existingTransaction);
  408   			return result;
  409   		}
  410   		catch (HibernateException ex) {
  411   			throw convertHibernateAccessException(ex);
  412   		}
  413   		catch (SQLException ex) {
  414   			throw convertJdbcAccessException(ex);
  415   		}
  416   		catch (RuntimeException ex) {
  417   			// Callback code threw application exception...
  418   			throw ex;
  419   		}
  420   		finally {
  421   			if (existingTransaction) {
  422   				logger.debug("Not closing pre-bound Hibernate Session after HibernateTemplate");
  423   				disableFilters(session);
  424   				if (previousFlushMode != null) {
  425   					session.setFlushMode(previousFlushMode);
  426   				}
  427   			}
  428   			else {
  429   				// Never use deferred close for an explicitly new Session.
  430   				if (isAlwaysUseNewSession()) {
  431   					SessionFactoryUtils.closeSession(session);
  432   				}
  433   				else {
  434   					SessionFactoryUtils.closeSessionOrRegisterDeferredClose(session, getSessionFactory());
  435   				}
  436   			}
  437   		}
  438   	}
  439   
  440   	/**
  441   	 * Return a Session for use by this template.
  442   	 * <p>Returns a new Session in case of "alwaysUseNewSession" (using the same
  443   	 * JDBC Connection as a transactional Session, if applicable), a pre-bound
  444   	 * Session in case of "allowCreate" turned off, and a pre-bound or new Session
  445   	 * otherwise (new only if no transactional or otherwise pre-bound Session exists).
  446   	 * @return the Session to use (never <code>null</code>)
  447   	 * @see SessionFactoryUtils#getSession
  448   	 * @see SessionFactoryUtils#getNewSession
  449   	 * @see #setAlwaysUseNewSession
  450   	 * @see #setAllowCreate
  451   	 */
  452   	protected Session getSession() {
  453   		if (isAlwaysUseNewSession()) {
  454   			return SessionFactoryUtils.getNewSession(getSessionFactory(), getEntityInterceptor());
  455   		}
  456   		else if (isAllowCreate()) {
  457   			return SessionFactoryUtils.getSession(
  458   					getSessionFactory(), getEntityInterceptor(), getJdbcExceptionTranslator());
  459   		}
  460   		else if (SessionFactoryUtils.hasTransactionalSession(getSessionFactory())) {
  461   			return SessionFactoryUtils.getSession(getSessionFactory(), false);
  462   		}
  463   		else {
  464   			try {
  465   				return getSessionFactory().getCurrentSession();
  466   			}
  467   			catch (HibernateException ex) {
  468   				throw new DataAccessResourceFailureException("Could not obtain current Hibernate Session", ex);
  469   			}
  470   		}
  471   	}
  472   
  473   	/**
  474   	 * Create a close-suppressing proxy for the given Hibernate Session.
  475   	 * The proxy also prepares returned Query and Criteria objects.
  476   	 * @param session the Hibernate Session to create a proxy for
  477   	 * @return the Session proxy
  478   	 * @see org.hibernate.Session#close()
  479   	 * @see #prepareQuery
  480   	 * @see #prepareCriteria
  481   	 */
  482   	protected Session createSessionProxy(Session session) {
  483   		Class[] sessionIfcs = null;
  484   		Class mainIfc = (session instanceof org.hibernate.classic.Session ?
  485   				org.hibernate.classic.Session.class : Session.class);
  486   		if (session instanceof EventSource) {
  487   			sessionIfcs = new Class[] {mainIfc, EventSource.class};
  488   		}
  489   		else if (session instanceof SessionImplementor) {
  490   			sessionIfcs = new Class[] {mainIfc, SessionImplementor.class};
  491   		}
  492   		else {
  493   			sessionIfcs = new Class[] {mainIfc};
  494   		}
  495   		return (Session) Proxy.newProxyInstance(
  496   				session.getClass().getClassLoader(), sessionIfcs,
  497   				new CloseSuppressingInvocationHandler(session));
  498   	}
  499   
  500   
  501   	//-------------------------------------------------------------------------
  502   	// Convenience methods for loading individual objects
  503   	//-------------------------------------------------------------------------
  504   
  505   	public <T> T get(Class<T> entityClass, Serializable id) throws DataAccessException {
  506   		return get(entityClass, id, null);
  507   	}
  508   
  509   	public <T> T get(final Class<T> entityClass, final Serializable id, final LockMode lockMode)
  510   			throws DataAccessException {
  511   
  512   		return executeWithNativeSession(new HibernateCallback<T>() {
  513   			@SuppressWarnings("unchecked")
  514   			public T doInHibernate(Session session) throws HibernateException {
  515   				if (lockMode != null) {
  516   					return (T) session.get(entityClass, id, lockMode);
  517   				}
  518   				else {
  519   					return (T) session.get(entityClass, id);
  520   				}
  521   			}
  522   		});
  523   	}
  524   
  525   	public Object get(String entityName, Serializable id) throws DataAccessException {
  526   		return get(entityName, id, null);
  527   	}
  528   
  529   	public Object get(final String entityName, final Serializable id, final LockMode lockMode)
  530   			throws DataAccessException {
  531   
  532   		return executeWithNativeSession(new HibernateCallback<Object>() {
  533   			public Object doInHibernate(Session session) throws HibernateException {
  534   				if (lockMode != null) {
  535   					return session.get(entityName, id, lockMode);
  536   				}
  537   				else {
  538   					return session.get(entityName, id);
  539   				}
  540   			}
  541   		});
  542   	}
  543   
  544   	public <T> T load(Class<T> entityClass, Serializable id) throws DataAccessException {
  545   		return load(entityClass, id, null);
  546   	}
  547   
  548   	public <T> T load(final Class<T> entityClass, final Serializable id, final LockMode lockMode)
  549   			throws DataAccessException {
  550   
  551   		return executeWithNativeSession(new HibernateCallback<T>() {
  552   			@SuppressWarnings("unchecked")
  553   			public T doInHibernate(Session session) throws HibernateException {
  554   				if (lockMode != null) {
  555   					return (T) session.load(entityClass, id, lockMode);
  556   				}
  557   				else {
  558   					return (T) session.load(entityClass, id);
  559   				}
  560   			}
  561   		});
  562   	}
  563   
  564   	public Object load(String entityName, Serializable id) throws DataAccessException {
  565   		return load(entityName, id, null);
  566   	}
  567   
  568   	public Object load(final String entityName, final Serializable id, final LockMode lockMode)
  569   			throws DataAccessException {
  570   
  571   		return executeWithNativeSession(new HibernateCallback<Object>() {
  572   			public Object doInHibernate(Session session) throws HibernateException {
  573   				if (lockMode != null) {
  574   					return session.load(entityName, id, lockMode);
  575   				}
  576   				else {
  577   					return session.load(entityName, id);
  578   				}
  579   			}
  580   		});
  581   	}
  582   
  583   	public <T> List<T> loadAll(final Class<T> entityClass) throws DataAccessException {
  584   		return executeWithNativeSession(new HibernateCallback<List<T>>() {
  585   			@SuppressWarnings("unchecked")
  586   			public List<T> doInHibernate(Session session) throws HibernateException {
  587   				Criteria criteria = session.createCriteria(entityClass);
  588   				criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
  589   				prepareCriteria(criteria);
  590   				return criteria.list();
  591   			}
  592   		});
  593   	}
  594   
  595   	public void load(final Object entity, final Serializable id) throws DataAccessException {
  596   		executeWithNativeSession(new HibernateCallback<Object>() {
  597   			public Object doInHibernate(Session session) throws HibernateException {
  598   				session.load(entity, id);
  599   				return null;
  600   			}
  601   		});
  602   	}
  603   
  604   	public void refresh(final Object entity) throws DataAccessException {
  605   		refresh(entity, null);
  606   	}
  607   
  608   	public void refresh(final Object entity, final LockMode lockMode) throws DataAccessException {
  609   		executeWithNativeSession(new HibernateCallback<Object>() {
  610   			public Object doInHibernate(Session session) throws HibernateException {
  611   				if (lockMode != null) {
  612   					session.refresh(entity, lockMode);
  613   				}
  614   				else {
  615   					session.refresh(entity);
  616   				}
  617   				return null;
  618   			}
  619   		});
  620   	}
  621   
  622   	public boolean contains(final Object entity) throws DataAccessException {
  623   		return executeWithNativeSession(new HibernateCallback<Boolean>() {
  624   			public Boolean doInHibernate(Session session) {
  625   				return session.contains(entity);
  626   			}
  627   		});
  628   	}
  629   
  630   	public void evict(final Object entity) throws DataAccessException {
  631   		executeWithNativeSession(new HibernateCallback<Object>() {
  632   			public Object doInHibernate(Session session) throws HibernateException {
  633   				session.evict(entity);
  634   				return null;
  635   			}
  636   		});
  637   	}
  638   
  639   	public void initialize(Object proxy) throws DataAccessException {
  640   		try {
  641   			Hibernate.initialize(proxy);
  642   		}
  643   		catch (HibernateException ex) {
  644   			throw SessionFactoryUtils.convertHibernateAccessException(ex);
  645   		}
  646   	}
  647   
  648   	public Filter enableFilter(String filterName) throws IllegalStateException {
  649   		Session session = SessionFactoryUtils.getSession(getSessionFactory(), false);
  650   		Filter filter = session.getEnabledFilter(filterName);
  651   		if (filter == null) {
  652   			filter = session.enableFilter(filterName);
  653   		}
  654   		return filter;
  655   	}
  656   
  657   
  658   	//-------------------------------------------------------------------------
  659   	// Convenience methods for storing individual objects
  660   	//-------------------------------------------------------------------------
  661   
  662   	public void lock(final Object entity, final LockMode lockMode) throws DataAccessException {
  663   		executeWithNativeSession(new HibernateCallback<Object>() {
  664   			public Object doInHibernate(Session session) throws HibernateException {
  665   				session.lock(entity, lockMode);
  666   				return null;
  667   			}
  668   		});
  669   	}
  670   
  671   	public void lock(final String entityName, final Object entity, final LockMode lockMode)
  672   			throws DataAccessException {
  673   
  674   		executeWithNativeSession(new HibernateCallback<Object>() {
  675   			public Object doInHibernate(Session session) throws HibernateException {
  676   				session.lock(entityName, entity, lockMode);
  677   				return null;
  678   			}
  679   		});
  680   	}
  681   
  682   	public Serializable save(final Object entity) throws DataAccessException {
  683   		return executeWithNativeSession(new HibernateCallback<Serializable>() {
  684   			public Serializable doInHibernate(Session session) throws HibernateException {
  685   				checkWriteOperationAllowed(session);
  686   				return session.save(entity);
  687   			}
  688   		});
  689   	}
  690   
  691   	public Serializable save(final String entityName, final Object entity) throws DataAccessException {
  692   		return executeWithNativeSession(new HibernateCallback<Serializable>() {
  693   			public Serializable doInHibernate(Session session) throws HibernateException {
  694   				checkWriteOperationAllowed(session);
  695   				return session.save(entityName, entity);
  696   			}
  697   		});
  698   	}
  699   
  700   	public void update(Object entity) throws DataAccessException {
  701   		update(entity, null);
  702   	}
  703   
  704   	public void update(final Object entity, final LockMode lockMode) throws DataAccessException {
  705   		executeWithNativeSession(new HibernateCallback<Object>() {
  706   			public Object doInHibernate(Session session) throws HibernateException {
  707   				checkWriteOperationAllowed(session);
  708   				session.update(entity);
  709   				if (lockMode != null) {
  710   					session.lock(entity, lockMode);
  711   				}
  712   				return null;
  713   			}
  714   		});
  715   	}
  716   
  717   	public void update(String entityName, Object entity) throws DataAccessException {
  718   		update(entityName, entity, null);
  719   	}
  720   
  721   	public void update(final String entityName, final Object entity, final LockMode lockMode)
  722   			throws DataAccessException {
  723   
  724   		executeWithNativeSession(new HibernateCallback<Object>() {
  725   			public Object doInHibernate(Session session) throws HibernateException {
  726   				checkWriteOperationAllowed(session);
  727   				session.update(entityName, entity);
  728   				if (lockMode != null) {
  729   					session.lock(entity, lockMode);
  730   				}
  731   				return null;
  732   			}
  733   		});
  734   	}
  735   
  736   	public void saveOrUpdate(final Object entity) throws DataAccessException {
  737   		executeWithNativeSession(new HibernateCallback<Object>() {
  738   			public Object doInHibernate(Session session) throws HibernateException {
  739   				checkWriteOperationAllowed(session);
  740   				session.saveOrUpdate(entity);
  741   				return null;
  742   			}
  743   		});
  744   	}
  745   
  746   	public void saveOrUpdate(final String entityName, final Object entity) throws DataAccessException {
  747   		executeWithNativeSession(new HibernateCallback<Object>() {
  748   			public Object doInHibernate(Session session) throws HibernateException {
  749   				checkWriteOperationAllowed(session);
  750   				session.saveOrUpdate(entityName, entity);
  751   				return null;
  752   			}
  753   		});
  754   	}
  755   
  756   	public void saveOrUpdateAll(final Collection entities) throws DataAccessException {
  757   		executeWithNativeSession(new HibernateCallback<Object>() {
  758   			public Object doInHibernate(Session session) throws HibernateException {
  759   				checkWriteOperationAllowed(session);
  760   				for (Object entity : entities) {
  761   					session.saveOrUpdate(entity);
  762   				}
  763   				return null;
  764   			}
  765   		});
  766   	}
  767   
  768   	public void replicate(final Object entity, final ReplicationMode replicationMode)
  769   			throws DataAccessException {
  770   
  771   		executeWithNativeSession(new HibernateCallback<Object>() {
  772   			public Object doInHibernate(Session session) throws HibernateException {
  773   				checkWriteOperationAllowed(session);
  774   				session.replicate(entity, replicationMode);
  775   				return null;
  776   			}
  777   		});
  778   	}
  779   
  780   	public void replicate(final String entityName, final Object entity, final ReplicationMode replicationMode)
  781   			throws DataAccessException {
  782   
  783   		executeWithNativeSession(new HibernateCallback<Object>() {
  784   			public Object doInHibernate(Session session) throws HibernateException {
  785   				checkWriteOperationAllowed(session);
  786   				session.replicate(entityName, entity, replicationMode);
  787   				return null;
  788   			}
  789   		});
  790   	}
  791   
  792   	public void persist(final Object entity) throws DataAccessException {
  793   		executeWithNativeSession(new HibernateCallback<Object>() {
  794   			public Object doInHibernate(Session session) throws HibernateException {
  795   				checkWriteOperationAllowed(session);
  796   				session.persist(entity);
  797   				return null;
  798   			}
  799   		});
  800   	}
  801   
  802   	public void persist(final String entityName, final Object entity) throws DataAccessException {
  803   		executeWithNativeSession(new HibernateCallback<Object>() {
  804   			public Object doInHibernate(Session session) throws HibernateException {
  805   				checkWriteOperationAllowed(session);
  806   				session.persist(entityName, entity);
  807   				return null;
  808   			}
  809   		});
  810   	}
  811   
  812   	public <T> T merge(final T entity) throws DataAccessException {
  813   		return executeWithNativeSession(new HibernateCallback<T>() {
  814   			@SuppressWarnings("unchecked")
  815   			public T doInHibernate(Session session) throws HibernateException {
  816   				checkWriteOperationAllowed(session);
  817   				return (T) session.merge(entity);
  818   			}
  819   		});
  820   	}
  821   
  822   	public <T> T merge(final String entityName, final T entity) throws DataAccessException {
  823   		return executeWithNativeSession(new HibernateCallback<T>() {
  824   			@SuppressWarnings("unchecked")
  825   			public T doInHibernate(Session session) throws HibernateException {
  826   				checkWriteOperationAllowed(session);
  827   				return (T) session.merge(entityName, entity);
  828   			}
  829   		});
  830   	}
  831   
  832   	public void delete(Object entity) throws DataAccessException {
  833   		delete(entity, null);
  834   	}
  835   
  836   	public void delete(final Object entity, final LockMode lockMode) throws DataAccessException {
  837   		executeWithNativeSession(new HibernateCallback<Object>() {
  838   			public Object doInHibernate(Session session) throws HibernateException {
  839   				checkWriteOperationAllowed(session);
  840   				if (lockMode != null) {
  841   					session.lock(entity, lockMode);
  842   				}
  843   				session.delete(entity);
  844   				return null;
  845   			}
  846   		});
  847   	}
  848   
  849   	public void delete(String entityName, Object entity) throws DataAccessException {
  850   		delete(entityName, entity, null);
  851   	}
  852   
  853   	public void delete(final String entityName, final Object entity, final LockMode lockMode)
  854   			throws DataAccessException {
  855   
  856   		executeWithNativeSession(new HibernateCallback<Object>() {
  857   			public Object doInHibernate(Session session) throws HibernateException {
  858   				checkWriteOperationAllowed(session);
  859   				if (lockMode != null) {
  860   					session.lock(entityName, entity, lockMode);
  861   				}
  862   				session.delete(entityName, entity);
  863   				return null;
  864   			}
  865   		});
  866   	}
  867   
  868   	public void deleteAll(final Collection entities) throws DataAccessException {
  869   		executeWithNativeSession(new HibernateCallback<Object>() {
  870   			public Object doInHibernate(Session session) throws HibernateException {
  871   				checkWriteOperationAllowed(session);
  872   				for (Object entity : entities) {
  873   					session.delete(entity);
  874   				}
  875   				return null;
  876   			}
  877   		});
  878   	}
  879   
  880   	public void flush() throws DataAccessException {
  881   		executeWithNativeSession(new HibernateCallback<Object>() {
  882   			public Object doInHibernate(Session session) throws HibernateException {
  883   				session.flush();
  884   				return null;
  885   			}
  886   		});
  887   	}
  888   
  889   	public void clear() throws DataAccessException {
  890   		executeWithNativeSession(new HibernateCallback<Object>() {
  891   			public Object doInHibernate(Session session) {
  892   				session.clear();
  893   				return null;
  894   			}
  895   		});
  896   	}
  897   
  898   
  899   	//-------------------------------------------------------------------------
  900   	// Convenience finder methods for HQL strings
  901   	//-------------------------------------------------------------------------
  902   
  903   	public List find(String queryString) throws DataAccessException {
  904   		return find(queryString, (Object[]) null);
  905   	}
  906   
  907   	public List find(String queryString, Object value) throws DataAccessException {
  908   		return find(queryString, new Object[] {value});
  909   	}
  910   
  911   	public List find(final String queryString, final Object... values) throws DataAccessException {
  912   		return executeWithNativeSession(new HibernateCallback<List>() {
  913   			public List doInHibernate(Session session) throws HibernateException {
  914   				Query queryObject = session.createQuery(queryString);
  915   				prepareQuery(queryObject);
  916   				if (values != null) {
  917   					for (int i = 0; i < values.length; i++) {
  918   						queryObject.setParameter(i, values[i]);
  919   					}
  920   				}
  921   				return queryObject.list();
  922   			}
  923   		});
  924   	}
  925   
  926   	public List findByNamedParam(String queryString, String paramName, Object value)
  927   			throws DataAccessException {
  928   
  929   		return findByNamedParam(queryString, new String[] {paramName}, new Object[] {value});
  930   	}
  931   
  932   	public List findByNamedParam(final String queryString, final String[] paramNames, final Object[] values)
  933   			throws DataAccessException {
  934   
  935   		if (paramNames.length != values.length) {
  936   			throw new IllegalArgumentException("Length of paramNames array must match length of values array");
  937   		}
  938   		return executeWithNativeSession(new HibernateCallback<List>() {
  939   			public List doInHibernate(Session session) throws HibernateException {
  940   				Query queryObject = session.createQuery(queryString);
  941   				prepareQuery(queryObject);
  942   				if (values != null) {
  943   					for (int i = 0; i < values.length; i++) {
  944   						applyNamedParameterToQuery(queryObject, paramNames[i], values[i]);
  945   					}
  946   				}
  947   				return queryObject.list();
  948   			}
  949   		});
  950   	}
  951   
  952   	public List findByValueBean(final String queryString, final Object valueBean)
  953   			throws DataAccessException {
  954   
  955   		return executeWithNativeSession(new HibernateCallback<List>() {
  956   			public List doInHibernate(Session session) throws HibernateException {
  957   				Query queryObject = session.createQuery(queryString);
  958   				prepareQuery(queryObject);
  959   				queryObject.setProperties(valueBean);
  960   				return queryObject.list();
  961   			}
  962   		});
  963   	}
  964   
  965   
  966   	//-------------------------------------------------------------------------
  967   	// Convenience finder methods for named queries
  968   	//-------------------------------------------------------------------------
  969   
  970   	public List findByNamedQuery(String queryName) throws DataAccessException {
  971   		return findByNamedQuery(queryName, (Object[]) null);
  972   	}
  973   
  974   	public List findByNamedQuery(String queryName, Object value) throws DataAccessException {
  975   		return findByNamedQuery(queryName, new Object[] {value});
  976   	}
  977   
  978   	public List findByNamedQuery(final String queryName, final Object... values) throws DataAccessException {
  979   		return executeWithNativeSession(new HibernateCallback<List>() {
  980   			public List doInHibernate(Session session) throws HibernateException {
  981   				Query queryObject = session.getNamedQuery(queryName);
  982   				prepareQuery(queryObject);
  983   				if (values != null) {
  984   					for (int i = 0; i < values.length; i++) {
  985   						queryObject.setParameter(i, values[i]);
  986   					}
  987   				}
  988   				return queryObject.list();
  989   			}
  990   		});
  991   	}
  992   
  993   	public List findByNamedQueryAndNamedParam(String queryName, String paramName, Object value)
  994   			throws DataAccessException {
  995   
  996   		return findByNamedQueryAndNamedParam(queryName, new String[] {paramName}, new Object[] {value});
  997   	}
  998   
  999   	public List findByNamedQueryAndNamedParam(
 1000   			final String queryName, final String[] paramNames, final Object[] values)
 1001   			throws DataAccessException {
 1002   
 1003   		if (paramNames != null && values != null && paramNames.length != values.length) {
 1004   			throw new IllegalArgumentException("Length of paramNames array must match length of values array");
 1005   		}
 1006   		return executeWithNativeSession(new HibernateCallback<List>() {
 1007   			public List doInHibernate(Session session) throws HibernateException {
 1008   				Query queryObject = session.getNamedQuery(queryName);
 1009   				prepareQuery(queryObject);
 1010   				if (values != null) {
 1011   					for (int i = 0; i < values.length; i++) {
 1012   						applyNamedParameterToQuery(queryObject, paramNames[i], values[i]);
 1013   					}
 1014   				}
 1015   				return queryObject.list();
 1016   			}
 1017   		});
 1018   	}
 1019   
 1020   	public List findByNamedQueryAndValueBean(final String queryName, final Object valueBean)
 1021   			throws DataAccessException {
 1022   
 1023   		return executeWithNativeSession(new HibernateCallback<List>() {
 1024   			public List doInHibernate(Session session) throws HibernateException {
 1025   				Query queryObject = session.getNamedQuery(queryName);
 1026   				prepareQuery(queryObject);
 1027   				queryObject.setProperties(valueBean);
 1028   				return queryObject.list();
 1029   			}
 1030   		});
 1031   	}
 1032   
 1033   
 1034   	//-------------------------------------------------------------------------
 1035   	// Convenience finder methods for detached criteria
 1036   	//-------------------------------------------------------------------------
 1037   
 1038   	public List findByCriteria(DetachedCriteria criteria) throws DataAccessException {
 1039   		return findByCriteria(criteria, -1, -1);
 1040   	}
 1041   
 1042   	public List findByCriteria(final DetachedCriteria criteria, final int firstResult, final int maxResults)
 1043   			throws DataAccessException {
 1044   
 1045   		Assert.notNull(criteria, "DetachedCriteria must not be null");
 1046   		return executeWithNativeSession(new HibernateCallback<List>() {
 1047   			public List doInHibernate(Session session) throws HibernateException {
 1048   				Criteria executableCriteria = criteria.getExecutableCriteria(session);
 1049   				prepareCriteria(executableCriteria);
 1050   				if (firstResult >= 0) {
 1051   					executableCriteria.setFirstResult(firstResult);
 1052   				}
 1053   				if (maxResults > 0) {
 1054   					executableCriteria.setMaxResults(maxResults);
 1055   				}
 1056   				return executableCriteria.list();
 1057   			}
 1058   		});
 1059   	}
 1060   
 1061   	public List findByExample(Object exampleEntity) throws DataAccessException {
 1062   		return findByExample(null, exampleEntity, -1, -1);
 1063   	}
 1064   
 1065   	public List findByExample(String entityName, Object exampleEntity) throws DataAccessException {
 1066   		return findByExample(entityName, exampleEntity, -1, -1);
 1067   	}
 1068   
 1069   	public List findByExample(Object exampleEntity, int firstResult, int maxResults) throws DataAccessException {
 1070   		return findByExample(null, exampleEntity, firstResult, maxResults);
 1071   	}
 1072   
 1073   	public List findByExample(
 1074   			final String entityName, final Object exampleEntity, final int firstResult, final int maxResults)
 1075   			throws DataAccessException {
 1076   
 1077   		Assert.notNull(exampleEntity, "Example entity must not be null");
 1078   		return executeWithNativeSession(new HibernateCallback<List>() {
 1079   			public List doInHibernate(Session session) throws HibernateException {
 1080   				Criteria executableCriteria = (entityName != null ?
 1081   						session.createCriteria(entityName) : session.createCriteria(exampleEntity.getClass()));
 1082   				executableCriteria.add(Example.create(exampleEntity));
 1083   				prepareCriteria(executableCriteria);
 1084   				if (firstResult >= 0) {
 1085   					executableCriteria.setFirstResult(firstResult);
 1086   				}
 1087   				if (maxResults > 0) {
 1088   					executableCriteria.setMaxResults(maxResults);
 1089   				}
 1090   				return executableCriteria.list();
 1091   			}
 1092   		});
 1093   	}
 1094   
 1095   
 1096   	//-------------------------------------------------------------------------
 1097   	// Convenience query methods for iteration and bulk updates/deletes
 1098   	//-------------------------------------------------------------------------
 1099   
 1100   	public Iterator iterate(String queryString) throws DataAccessException {
 1101   		return iterate(queryString, (Object[]) null);
 1102   	}
 1103   
 1104   	public Iterator iterate(String queryString, Object value) throws DataAccessException {
 1105   		return iterate(queryString, new Object[] {value});
 1106   	}
 1107   
 1108   	public Iterator iterate(final String queryString, final Object... values) throws DataAccessException {
 1109   		return executeWithNativeSession(new HibernateCallback<Iterator>() {
 1110   			public Iterator doInHibernate(Session session) throws HibernateException {
 1111   				Query queryObject = session.createQuery(queryString);
 1112   				prepareQuery(queryObject);
 1113   				if (values != null) {
 1114   					for (int i = 0; i < values.length; i++) {
 1115   						queryObject.setParameter(i, values[i]);
 1116   					}
 1117   				}
 1118   				return queryObject.iterate();
 1119   			}
 1120   		});
 1121   	}
 1122   
 1123   	public void closeIterator(Iterator it) throws DataAccessException {
 1124   		try {
 1125   			Hibernate.close(it);
 1126   		}
 1127   		catch (HibernateException ex) {
 1128   			throw SessionFactoryUtils.convertHibernateAccessException(ex);
 1129   		}
 1130   	}
 1131   
 1132   	public int bulkUpdate(String queryString) throws DataAccessException {
 1133   		return bulkUpdate(queryString, (Object[]) null);
 1134   	}
 1135   
 1136   	public int bulkUpdate(String queryString, Object value) throws DataAccessException {
 1137   		return bulkUpdate(queryString, new Object[] {value});
 1138   	}
 1139   
 1140   	public int bulkUpdate(final String queryString, final Object... values) throws DataAccessException {
 1141   		return executeWithNativeSession(new HibernateCallback<Integer>() {
 1142   			public Integer doInHibernate(Session session) throws HibernateException {
 1143   				Query queryObject = session.createQuery(queryString);
 1144   				prepareQuery(queryObject);
 1145   				if (values != null) {
 1146   					for (int i = 0; i < values.length; i++) {
 1147   						queryObject.setParameter(i, values[i]);
 1148   					}
 1149   				}
 1150   				return queryObject.executeUpdate();
 1151   			}
 1152   		});
 1153   	}
 1154   
 1155   
 1156   	//-------------------------------------------------------------------------
 1157   	// Helper methods used by the operations above
 1158   	//-------------------------------------------------------------------------
 1159   
 1160   	/**
 1161   	 * Check whether write operations are allowed on the given Session.
 1162   	 * <p>Default implementation throws an InvalidDataAccessApiUsageException in
 1163   	 * case of <code>FlushMode.MANUAL</code>. Can be overridden in subclasses.
 1164   	 * @param session current Hibernate Session
 1165   	 * @throws InvalidDataAccessApiUsageException if write operations are not allowed
 1166   	 * @see #setCheckWriteOperations
 1167   	 * @see #getFlushMode()
 1168   	 * @see #FLUSH_EAGER
 1169   	 * @see org.hibernate.Session#getFlushMode()
 1170   	 * @see org.hibernate.FlushMode#MANUAL
 1171   	 */
 1172   	protected void checkWriteOperationAllowed(Session session) throws InvalidDataAccessApiUsageException {
 1173   		if (isCheckWriteOperations() && getFlushMode() != FLUSH_EAGER &&
 1174   				session.getFlushMode().lessThan(FlushMode.COMMIT)) {
 1175   			throw new InvalidDataAccessApiUsageException(
 1176   					"Write operations are not allowed in read-only mode (FlushMode.MANUAL): "+
 1177   					"Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.");
 1178   		}
 1179   	}
 1180   
 1181   	/**
 1182   	 * Prepare the given Query object, applying cache settings and/or
 1183   	 * a transaction timeout.
 1184   	 * @param queryObject the Query object to prepare
 1185   	 * @see #setCacheQueries
 1186   	 * @see #setQueryCacheRegion
 1187   	 * @see SessionFactoryUtils#applyTransactionTimeout
 1188   	 */
 1189   	protected void prepareQuery(Query queryObject) {
 1190   		if (isCacheQueries()) {
 1191   			queryObject.setCacheable(true);
 1192   			if (getQueryCacheRegion() != null) {
 1193   				queryObject.setCacheRegion(getQueryCacheRegion());
 1194   			}
 1195   		}
 1196   		if (getFetchSize() > 0) {
 1197   			queryObject.setFetchSize(getFetchSize());
 1198   		}
 1199   		if (getMaxResults() > 0) {
 1200   			queryObject.setMaxResults(getMaxResults());
 1201   		}
 1202   		SessionFactoryUtils.applyTransactionTimeout(queryObject, getSessionFactory());
 1203   	}
 1204   
 1205   	/**
 1206   	 * Prepare the given Criteria object, applying cache settings and/or
 1207   	 * a transaction timeout.
 1208   	 * @param criteria the Criteria object to prepare
 1209   	 * @see #setCacheQueries
 1210   	 * @see #setQueryCacheRegion
 1211   	 * @see SessionFactoryUtils#applyTransactionTimeout
 1212   	 */
 1213   	protected void prepareCriteria(Criteria criteria) {
 1214   		if (isCacheQueries()) {
 1215   			criteria.setCacheable(true);
 1216   			if (getQueryCacheRegion() != null) {
 1217   				criteria.setCacheRegion(getQueryCacheRegion());
 1218   			}
 1219   		}
 1220   		if (getFetchSize() > 0) {
 1221   			criteria.setFetchSize(getFetchSize());
 1222   		}
 1223   		if (getMaxResults() > 0) {
 1224   			criteria.setMaxResults(getMaxResults());
 1225   		}
 1226   		SessionFactoryUtils.applyTransactionTimeout(criteria, getSessionFactory());
 1227   	}
 1228   
 1229   	/**
 1230   	 * Apply the given name parameter to the given Query object.
 1231   	 * @param queryObject the Query object
 1232   	 * @param paramName the name of the parameter
 1233   	 * @param value the value of the parameter
 1234   	 * @throws HibernateException if thrown by the Query object
 1235   	 */
 1236   	protected void applyNamedParameterToQuery(Query queryObject, String paramName, Object value)
 1237   			throws HibernateException {
 1238   
 1239   		if (value instanceof Collection) {
 1240   			queryObject.setParameterList(paramName, (Collection) value);
 1241   		}
 1242   		else if (value instanceof Object[]) {
 1243   			queryObject.setParameterList(paramName, (Object[]) value);
 1244   		}
 1245   		else {
 1246   			queryObject.setParameter(paramName, value);
 1247   		}
 1248   	}
 1249   
 1250   
 1251   	/**
 1252   	 * Invocation handler that suppresses close calls on Hibernate Sessions.
 1253   	 * Also prepares returned Query and Criteria objects.
 1254   	 * @see org.hibernate.Session#close
 1255   	 */
 1256   	private class CloseSuppressingInvocationHandler implements InvocationHandler {
 1257   
 1258   		private final Session target;
 1259   
 1260   		public CloseSuppressingInvocationHandler(Session target) {
 1261   			this.target = target;
 1262   		}
 1263   
 1264   		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
 1265   			// Invocation on Session interface coming in...
 1266   
 1267   			if (method.getName().equals("equals")) {
 1268   				// Only consider equal when proxies are identical.
 1269   				return (proxy == args[0]);
 1270   			}
 1271   			else if (method.getName().equals("hashCode")) {
 1272   				// Use hashCode of Session proxy.
 1273   				return System.identityHashCode(proxy);
 1274   			}
 1275   			else if (method.getName().equals("close")) {
 1276   				// Handle close method: suppress, not valid.
 1277   				return null;
 1278   			}
 1279   
 1280   			// Invoke method on target Session.
 1281   			try {
 1282   				Object retVal = method.invoke(this.target, args);
 1283   
 1284   				// If return value is a Query or Criteria, apply transaction timeout.
 1285   				// Applies to createQuery, getNamedQuery, createCriteria.
 1286   				if (retVal instanceof Query) {
 1287   					prepareQuery(((Query) retVal));
 1288   				}
 1289   				if (retVal instanceof Criteria) {
 1290   					prepareCriteria(((Criteria) retVal));
 1291   				}
 1292   
 1293   				return retVal;
 1294   			}
 1295   			catch (InvocationTargetException ex) {
 1296   				throw ex.getTargetException();
 1297   			}
 1298   		}
 1299   	}
 1300   
 1301   }

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