java.lang.ClassCastException_BlobByteArrayType.dee pCopy
i have some trouble at cast between Blob and org.springframework.orm.hibernate.support.BlobByte ArrayType
the errro is：
my domain object:Code:java.lang.ClassCastException at org.springframework.orm.hibernate.support.BlobByteArrayType.deepCopy(BlobByteArrayType.java:85) at net.sf.hibernate.type.CustomType.deepCopy(CustomType.java:142) at net.sf.hibernate.type.TypeFactory.deepCopy(TypeFactory.java:212) at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:926) at net.sf.hibernate.impl.SessionImpl.doSave(SessionImpl.java:857) at net.sf.hibernate.impl.SessionImpl.saveWithGeneratedIdentifier(SessionImpl.java:779) at net.sf.hibernate.impl.SessionImpl.save(SessionImpl.java:738) at org.springframework.orm.hibernate.HibernateTemplate$11.doInHibernate(HibernateTemplate.java:325) at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:200) at org.springframework.orm.hibernate.HibernateTemplate.save(HibernateTemplate.java:322) at com.jctx.trms.hibernate.DAO.FigureFileDAOImpl.addFigureFile(FigureFileDAOImpl.java:16) at com.jctx.trms.hibernate.bussiness.FigureFileManagerImpl.addFigureFile(FigureFileManagerImpl.java:19) 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:324) at org.springframework.aop.framework.AopProxyUtils.invokeJoinpointUsingReflection(AopProxyUtils.java:61) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:149) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:116) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:56) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:138) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:152) at $Proxy6.addFigureFile(Unknown Source) at com.jctx.trms.propertyui.NetworkUI$1.widgetSelected(NetworkUI.java:272) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2772) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2431) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:96) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129) 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:324) at org.eclipse.core.launcher.Main.basicRun(Main.java:185) at org.eclipse.core.launcher.Main.run(Main.java:704) at org.eclipse.core.launcher.Main.main(Main.java:688)
daoCode:package com.jctx.trms.hibernate.persistence; import java.sql.Blob; public class FigureFile extends BaseObject { private long id; private Blob figureData; public FigureFile() { } public Blob getFigureData() { return figureData; } public void setFigureData(Blob figureData) { this.figureData = figureData; } public long getId() { return id; } public void setId(long id) { this.id = id; } }
Code:public class FigureFileDAOImpl extends HibernateDaoSupport implements FigureFileDAO { public void addFigureFile(FigureFile figureFile) { getHibernateTemplate().save(figureFile); } ..........
applicationContext.xml
Code:<!-- NativeJdbcExtractor for the Commons DBCP connection pool above --> <bean id="nativeJdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.CommonsDbcpNativeJdbcExtractor" lazy-init="true"/> <!-- LobHandler for Oracle JDBC drivers --> <bean id="lobHandler" class="org.springframework.jdbc.support.lob.OracleLobHandler" lazy-init="true"> <property name="nativeJdbcExtractor"><ref local="nativeJdbcExtractor"/></property> </bean> <!-- Hibernate SessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate.LocalSessionFactoryBean"> <property name="dataSource"><ref local="dataSource"/></property> <!-- --> <property name="lobHandler"><ref bean="lobHandler" /></property> ................ <!-- Transaction --> <bean id="transactionManager" class="org.springframework.orm.hibernate.HibernateTransactionManager"> <property name="sessionFactory"> <ref local="sessionFactory"/> </property> </bean> <!-- FigureFile --> <bean id="figureFileDAO" class="com.jctx.trms.hibernate.DAO.FigureFileDAOImpl"> <property name="sessionFactory"> <ref local="sessionFactory"/> </property> </bean> <bean id="figureFileManager" parent="txProxyTemplate"> <property name="target"> <bean class="com.jctx.trms.hibernate.bussiness.FigureFileManagerImpl"> <property name="figureFileDAO"><ref bean="figureFileDAO"/></property> </bean> </property> </bean> <!-- Transaction Proxy --> <bean id="txProxyTemplate" lazy-init="true" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> <property name="transactionManager"> <ref bean="transactionManager"/> </property> <property name="transactionAttributes"> <props> <prop key="del*">PROPAGATION_REQUIRED</prop> <prop key="add*">PROPAGATION_REQUIRED</prop> <prop key="update*">PROPAGATION_REQUIRED</prop> </props> </property> </bean>
hbm.xml
the code that insert blob to db。Code:<?xml version="1.0"?> <!DOCTYPE hibernate-mapping SYSTEM "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"> <hibernate-mapping> <class name="com.jctx.trms.hibernate.persistence.FigureFile" table="FIGUREFILE"> <!--jcs-cache usage="read-only"/--> <id name="id" column="ID" type="java.lang.Long" unsaved-value="null" > <generator class="sequence"> </generator> </id> <property name="figureData" type="org.springframework.orm.hibernate.support.BlobByteArrayType" column="FIGUREDATA" /> </class> </hibernate-mapping>
Code:FigureFile f= new FigureFile(); LogicDiagram l = new LogicDiagram(); ByteArrayInputStream bais = null; try { ByteArrayOutputStream baos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(baos); oos.writeObject(l); oos.flush(); oos.close(); baos.close(); bais = new ByteArrayInputStream(baos.toByteArray()); bais.close(); } catch (Exception e1) { e1.printStackTrace(); } try { f.setFigureData(Hibernate.createBlob(bais)); } catch (IOException e2) { e2.printStackTrace(); } catch (SQLException e3) { e3.printStackTrace(); } //get FigureFileManager instance FigureFileManager ff = GlobalApplicationContext.getFigureFileManager(); ff.addFigureFile(f);
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