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問題
Service Builderを使用してカスタムエンティティを開発しました。
テーブルの1つは、LOBカラムを定義しています。
そのカラムにレコードを挿入しようとすると、次のようなデータベース例外が発生します：
java.lang.ClassCastException: javax.sql.rowset.serial.SerialBlob cannot be cast to oracle.sql.BLOB at oracle.jdbc.driver.OraclePreparedStatement.setBlob(OraclePreparedStatement.java:7193) at oracle.jdbc.driver.OraclePreparedStatementWrapper.setBlob(OraclePreparedStatementWrapper.java:137) at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.setBlob(HikariProxyPreparedStatement.java) at org.hibernate.type.descriptor.sql.BlobTypeDescriptor$3$1.doBind(BlobTypeDescriptor.java:88) at org.hibernate.type.descriptor.sql.BlobTypeDescriptor$1$1.doBind(BlobTypeDescriptor.java:61) at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:91) at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:283) at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:278) at org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:89) at org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2184) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2559) at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2495) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2822) at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:113) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:265) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:185) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) at com.liferay.portal.dao.orm.hibernate.event.NestableFlushEventListener.onFlush(NestableFlushEventListener.java:61) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133) at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:663) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:765) at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:734) at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._commit(DefaultTransactionExecutor.java:128) at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.commit(DefaultTransactionExecutor.java:36) at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:62) at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:58) at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:137) at com.liferay.portal.spring.aop.ChainableMethodAdvice.invoke(ChainableMethodAdvice.java:55) at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:137) at com.liferay.portal.spring.aop.ServiceBeanAopProxy.invoke(ServiceBeanAopProxy.java:169) ... ... ...