Hibernate3 父子映射報錯：illegal access to loading collection
		
          
		
		
          
				
				
						
          
						org.springframework.orm.hibernate3.HibernateSystemException:?illegal?access?to?loading?collection;?nested?exception?is?org.hibernate.LazyInitializationException:?illegal?access?to?loading?collection
          Caused?by:?org.hibernate.LazyInitializationException:?illegal?access?to?loading?collection
          ????at?org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:          
				341
				)
          ????at?org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:          
				86
				)
          ????at?org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:          
				355
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:          
				348
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.reflectionAppend(HashCodeBuilder.java:          
				309
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:          
				283
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:          
				150
				)
          ????at?com.hiany.forum.domain.base.BaseObject.hashCode(BaseObject.java:          
				32
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:          
				348
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.reflectionAppend(HashCodeBuilder.java:          
				309
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:          
				283
				)
          ????at?org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:          
				150
				)
          ????at?com.hiany.forum.domain.base.BaseObject.hashCode(BaseObject.java:          
				32
				)
          ????at?java.util.HashMap.hash(HashMap.java:          
				264
				)
          ????at?java.util.HashMap.put(HashMap.java:          
				382
				)
          ????at?java.util.HashSet.add(HashSet.java:          
				194
				)
          ????at?java.util.AbstractCollection.addAll(AbstractCollection.java:          
				318
				)
          ????at?org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:          
				273
				)
          ????at?org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:          
				183
				)
          ????at?org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:          
				268
				)
          ????at?org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:          
				249
				)
          ????at?org.hibernate.loader.Loader.endCollectionLoad(Loader.java:          
				866
				)
          ????at?org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:          
				853
				)
          ????at?org.hibernate.loader.Loader.doQuery(Loader.java:          
				717
				)
          ????at?org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:          
				224
				)
          ????at?org.hibernate.loader.Loader.loadCollection(Loader.java:          
				1919
				)
          ????at?org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:          
				36
				)
          ????at?org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:          
				520
				)
          ????at?org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:          
				60
				)
          ????at?org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:          
				1676
				)
          ????at?org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:          
				454
				)
          ????at?org.hibernate.engine.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:          
				755
				)
          ????at?org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:          
				229
				)
          ????at?org.hibernate.loader.Loader.loadEntity(Loader.java:          
				1785
				)
          ????at?org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:          
				47
				)
          ????at?org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:          
				41
				)
          ????at?org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:          
				2730
				)
          ????at?org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:          
				365
				)
          ????at?org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:          
				346
				)
          ????at?org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:          
				123
				)
          ????at?org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:          
				177
				)
          ????at?org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:          
				87
				)
          ????at?org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:          
				862
				)
          ????at?org.hibernate.impl.SessionImpl.get(SessionImpl.java:          
				799
				)
          ????at?org.hibernate.impl.SessionImpl.get(SessionImpl.java:          
				792
				)
          ????at?org.springframework.orm.hibernate3.HibernateTemplate$          
				1
				.doInHibernate(HibernateTemplate.java:
				460
				)
          ????at?org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:          
				362
				)
          ????at?org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:          
				454
				)
          ????at?org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:          
				448
				)
          ????at?com.hiany.forum.dao.HibernateGenericDao.get(HibernateGenericDao.java:          
				41
				)
          ????at?com.hiany.forum.dao.HibernateEntityDao.get(HibernateEntityDao.java:          
				40
				)
          ????at?com.hiany.forum.dao.HibernateEntityDao$$FastClassByCGLIB$$967b2136.invoke(          
				<
				generated
				>
				)
          ????at?net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:          
				149
				)
          ????at?org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:          
				714
				)
          ????at?org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:          
				162
				)
          ????at?org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:          
				107
				)
          ????at?org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:          
				185
				)
          ????at?org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:          
				652
				)
          ????at?com.hiany.forum.service.ArticleManager$$EnhancerByCGLIB$$64259eef.get(          
				<
				generated
				>
				)
          ????at?com.hiany.forum.service.ArticleManageTest.testArticleManager(ArticleManageTest.java:          
				56
				)
          ????at?sun.reflect.NativeMethodAccessorImpl.invoke0(Native?Method)
          ????at?sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:          
				39
				)
          ????at?sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:          
				25
				)
          ????at?java.lang.reflect.Method.invoke(Method.java:          
				585
				)
          ????at?junit.framework.TestCase.runTest(TestCase.java:          
				154
				)
          ????at?junit.framework.TestCase.runBare(TestCase.java:          
				127
				)
          ????at?org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:          
				69
				)
          ????at?junit.framework.TestResult$          
				1
				.protect(TestResult.java:
				106
				)
          ????at?junit.framework.TestResult.runProtected(TestResult.java:          
				124
				)
          ????at?junit.framework.TestResult.run(TestResult.java:          
				109
				)
          ????at?junit.framework.TestCase.run(TestCase.java:          
				118
				)
          ????at?junit.framework.TestSuite.runTest(TestSuite.java:          
				208
				)
          ????at?junit.framework.TestSuite.run(TestSuite.java:          
				203
				)
          ????at?org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:          
				128
				)
          ????at?org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:          
				38
				)
          ????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:          
				460
				)
          ????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:          
				673
				)
          ????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:          
				386
				)
          ????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:          
				196
				)
		
          在做父子映射時候，使用父類去獲取子類時候，報錯如上。
          跟蹤棧信息，我們可以發現，domain object的 hashCode 方法有錯誤。
          原來的domain object 使用了BaseObject作為基類：

          import?org.apache.commons.lang.builder.EqualsBuilder;
          import?org.apache.commons.lang.builder.HashCodeBuilder;
          import?org.apache.commons.lang.builder.ToStringBuilder;
          import?org.apache.commons.lang.builder.ToStringStyle;

          import?java.io.Serializable;

          /**
          ?*?基類，domain?object?
          ?*?繼承此類可以自動獲得toString?equals?hashCode的method。
          ?          */
          public?abstract?class?BaseObject?implements?Serializable?{
          ????          private?static?final?long?serialVersionUID?=?3256446889040622647L;

          ????          public?String?toString()?{
          ????????          return?ToStringBuilder.reflectionToString(this,
          ????????????????ToStringStyle.MULTI_LINE_STYLE);
          ????}

          ????          public?boolean?equals(Object?o)?{
          ????????          return?EqualsBuilder.reflectionEquals(this,?o);
          ????}

          ????          public?int?hashCode()?{
          ????????          return?HashCodeBuilder.reflectionHashCode(this);
          ????}
          ????
          ????          protected?void?init(){};
          }

          但是除去該基類后，發現錯誤被修復了。
          暫時還不清楚問題為什么會發生。
		
          
			posted on 2006-10-16 09:29 旱頭憨腦 閱讀(6180) 評論(1)  編輯  收藏  
		
          
		
          
	
          
	
	


	


          
	    
    


          

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				# re: Hibernate3 父子映射報錯：illegal access to loading collection
					
						2007-12-19 14:44
					
				d  回復  更多評論
				  
			
          			
				原因在與pojo里面的   public int hashCode() {... } 方法調用了set對象成員的hashCode()方法
          如this.getSets().hashCode();
          刪除該方法的調用即可；調用非set對象成員的.hashCode()方法沒有問題。				
		
          
		
          
		

          





          





          


          

	
          
		
          
				
		
	
		
          
		
		
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