StackOverflowError

[Andrew]

When using the Hibernate3BeanReplicator with a class that has a java.util.Calendar object I get the error below.  I've only included the first 50 lines of the 1025 lines generated.  Any help would be appreciated.

Thanks,
Andrew

java.lang.StackOverflowError
    at org.apache.log4j.CategoryKey.equals(CategoryKey.java:47)
    at java.util.Hashtable.get(Unknown Source)
    at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:268)
    at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:242)
    at org.apache.log4j.LogManager.getLogger(LogManager.java:188)
    at org.apache.log4j.Logger.getLogger(Logger.java:117)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.<init>(ReplicatorTemplate.java:44)
    at net.sf.beanlib.provider.BeanTransformer.<init>(BeanTransformer.java:185)
    at net.sf.beanlib.provider.BeanPopulator.<init>(BeanPopulator.java:134)
    at net.sf.beanlib.provider.BeanPopulator$Factory.newBeanPopulator(BeanPopulator.java:123)
    at net.sf.beanlib.provider.BeanPopulator$Factory.newBeanPopulator(BeanPopulator.java:1)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.populateBean(ReplicatorTemplate.java:175)
    at net.sf.beanlib.provider.replicator.BeanReplicator.replicateBean(BeanReplicator.java:196)
    at net.sf.beanlib.hibernate3.Hibernate3JavaBeanReplicator.replicateBean(Hibernate3JavaBeanReplicator.java:77)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicateByBeanReplicatable(ReplicatorTemplate.java:126)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicate(ReplicatorTemplate.java:120)
    at net.sf.beanlib.provider.BeanTransformer.transform(BeanTransformer.java:255)
    at net.sf.beanlib.provider.BeanPopulator.doit(BeanPopulator.java:231)
    at net.sf.beanlib.provider.BeanPopulator.processSetterMethod(BeanPopulator.java:185)
    at net.sf.beanlib.provider.BeanPopulator.populate(BeanPopulator.java:325)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.populateBean(ReplicatorTemplate.java:179)
    at net.sf.beanlib.provider.replicator.BeanReplicator.replicateBean(BeanReplicator.java:196)
    at net.sf.beanlib.hibernate3.Hibernate3JavaBeanReplicator.replicateBean(Hibernate3JavaBeanReplicator.java:77)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicateByBeanReplicatable(ReplicatorTemplate.java:126)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicate(ReplicatorTemplate.java:120)
    at net.sf.beanlib.provider.BeanTransformer.transform(BeanTransformer.java:255)
    at net.sf.beanlib.provider.BeanPopulator.doit(BeanPopulator.java:231)
    at net.sf.beanlib.provider.BeanPopulator.processSetterMethod(BeanPopulator.java:185)
    at net.sf.beanlib.provider.BeanPopulator.populate(BeanPopulator.java:325)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.populateBean(ReplicatorTemplate.java:179)
    at net.sf.beanlib.provider.replicator.BeanReplicator.replicateBean(BeanReplicator.java:196)
    at net.sf.beanlib.hibernate3.Hibernate3JavaBeanReplicator.replicateBean(Hibernate3JavaBeanReplicator.java:77)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicateByBeanReplicatable(ReplicatorTemplate.java:126)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicate(ReplicatorTemplate.java:120)
    at net.sf.beanlib.provider.BeanTransformer.transform(BeanTransformer.java:255)
    at net.sf.beanlib.provider.BeanPopulator.doit(BeanPopulator.java:231)
    at net.sf.beanlib.provider.BeanPopulator.processSetterMethod(BeanPopulator.java:185)
    at net.sf.beanlib.provider.BeanPopulator.populate(BeanPopulator.java:325)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.populateBean(ReplicatorTemplate.java:179)
    at net.sf.beanlib.provider.replicator.BeanReplicator.replicateBean(BeanReplicator.java:196)
    at net.sf.beanlib.hibernate3.Hibernate3JavaBeanReplicator.replicateBean(Hibernate3JavaBeanReplicator.java:77)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicateByBeanReplicatable(ReplicatorTemplate.java:126)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.replicate(ReplicatorTemplate.java:120)
    at net.sf.beanlib.provider.BeanTransformer.transform(BeanTransformer.java:255)
    at net.sf.beanlib.provider.BeanPopulator.doit(BeanPopulator.java:231)
    at net.sf.beanlib.provider.BeanPopulator.processSetterMethod(BeanPopulator.java:185)
    at net.sf.beanlib.provider.BeanPopulator.populate(BeanPopulator.java:325)
    at net.sf.beanlib.provider.replicator.ReplicatorTemplate.populateBean(ReplicatorTemplate.java:179)
    at net.sf.beanlib.provider.replicator.BeanReplicator.replicateBean(BeanReplicator.java:196)

[Joe D. Velopar]

Interesting, and thanks for reporting this.

For now, you can use a custom transformer for Calendar objects, like so:

public class CalendarTransformer implements CustomBeanTransformerSpi {
    public static class Factory implements CustomBeanTransformerSpi.Factory {
        @Override
        public CustomBeanTransformerSpi newCustomBeanTransformer(BeanTransformerSpi contextBeanTransformer) {
            return new CalendarTransformer();
        }
    }

    @Override
    public <T> boolean isTransformable(Object from, Class<T> toClass, PropertyInfo propertyInfo) {
        return from instanceof Calendar
            && Calendar.class.isAssignableFrom(toClass);
    }

    @Override
    public <T> T transform(Object in, Class<T> toClass, PropertyInfo propertyInfo) {
        Calendar cal = (Calendar)in;
        return (T)cal.clone();
    }
}

=====
Usages
=====
If you are replicating via Hibernate3BeanReplicator (for Hibernate objects), you can plug in this custom transformer like:

            T from = ...
            T to = new Hibernate3BeanReplicator()
                             .initCustomTransformerFactory(new CalendarTransformer.Factory())
                             .copy(from)
                             ;

If you are replicating via BeanReplicator (for simple pojo's), you can plug in the same custom transform like:

            T from = ...
            T to = new BeanReplicator(new BeanTransformer(new CalendarTransformer.Factory())).replicateBean(from);

In the future, I will provide native support of Calendar in Beanlib.

Cheers,
Hanson

[Andrew]

That worked a treat.  Thank you so much.

Andrew