DDevelopment & Design

Unable to instantiate default tuplizer

I wrote few hbm mappings for domain classes in my recent project, and I got exception like that:org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]Of course my first thought was googl…

I wrote few hbm mappings for domain classes in my recent project, and I got exception like that:

org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]

Of course my first thought was googling for it and I found interesting answers. Most commons causes of this exception are:

  • missing getters or setters, what’s more, even a typo or wrong letter case (like getParentproject instead of getParentProject when field in class and mapping file is defined as parentProject)
  • missing default constructor
  • missing dependency for javassist library
My files seemed to be correctly defined, so it had to be missing dependency.

To fix it I’ve added these lines to my pom.xml:

<dependency>
    <groupId>org.javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.18.0-GA</version>
</dependency>

Well, it shouldn’t be a surprise because in full stacktrafe from this error there is an entry:

java.lang.ClassNotFoundException: javassist.util.proxy.MethodFilter

What explicitly indicates where is the root of this problem ;)

(And BTW: in my recent project I’m stuck with quite old version of Hibernate – 3.6.3)

— Previous article

The Future of Programming

Next article —

Integration tests with Maven and JUnit

You May Also Like
DDevelopment & Design

Spring security authentication-success-handler-ref and authentication-failure-handler-ref does not work with KerberosServiceAuthenticationProvider

I'm using SpringSecurity with KerberosServiceAuthenticationProvider which is Kerberos security extension. You can read how to use it on extension author's blog.But you cannot use handler on form-login to catch authorization result. It's because of inne...I'm using SpringSecurity with KerberosServiceAuthenticationProvider which is Kerberos security extension. You can read how to use it on extension author's blog.But you cannot use handler on form-login to catch authorization result. It's because of inne...
DDevelopment & Design

OVal – validate your models quickly and effortlessly!

Some time ago one of the projects at work required me to validate some Java POJOs. Theses were my model classes and I've been creating them from incoming WebService requests. One would say that XSD would be sufficient for the task, for parts of this va...Some time ago one of the projects at work required me to validate some Java POJOs. Theses were my model classes and I've been creating them from incoming WebService requests. One would say that XSD would be sufficient for the task, for parts of this va...