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Re: [eclipselink-users] java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.Short
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Hi Warren,
What does the table for Book look like? How is the column for illustrations
defined?
What is the exception trace?
-Tom
Warren Tang wrote:
> Hi everyone,
>
> I've just began to learn EclipseLink. I've got into trouble on a sample
> built with JPA and Derby. When calling entitymanager.persist and then
> committing, an error is thrown:
>
> Rollback Exception [cause = java.lang.ClassCastException:
> java.lang.Boolean cannot be cast to java.lang.Short]
>
> The problem seems to be the Boolean type. If I change it to Short the
> error goes away. But cannot I use Boolean type? Isn't EclipseLink
> supposed to do the conversion for me? Or is there some special syntax to
> do it?
>
> The entity class is as follows:
>
> @Entity
> @NamedQuery(name = "findAllBooks", query="select b from Book b")
> public class Book {
> @Id @GeneratedValue
> private Long id;
> @Column(nullable = false)
> private String title;
> private Float price;
> @Column(length = 2000)
> private String description;
> private String isbn;
> private Integer nbOfPage;
> private Boolean illustrations;
>
> //getters/setters omitted.
> }
>
> The sample is compiled against Java 1.6 and the dependencies defined in
> pom.xml are as follows:
>
> <dependencies>
> <!-- JPA interface -->
> <dependency>
> <groupId>org.eclipse.persistence</groupId>
> <artifactId>javax.persistence</artifactId>
> <version>2.0.0</version>
> </dependency>
> <!-- Persistence provider -->
> <dependency>
> <groupId>org.eclipse.persistence</groupId>
> <artifactId>eclipselink</artifactId>
> <version>2.0.0</version>
> </dependency>
> <!-- Derby JDBC driver -->
> <dependency>
> <groupId>org.apache.derby</groupId>
> <artifactId>derbyclient</artifactId>
> <version>10.8.1.2</version>
> </dependency>
> <!-- Derby embedded jar -->
> <dependency>
> <groupId>org.apache.derby</groupId>
> <artifactId>derby</artifactId>
> <version>10.8.1.2</version>
> </dependency>
> <dependency>
> <groupId>junit</groupId>
> <artifactId>junit</artifactId>
> <version>4.9</version>
> <scope>test</scope>
> </dependency>
> </dependencies>
>
> --
> Regards,
> Warren Tang <http://blog.tangcs.com>
>
>
> ------------------------------------------------------------------------
>
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