NPE in BeanReferenceCollectionConverterImpl on update on empty collection
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Key: JCR-1470
URL: https://issues.apache.org/jira/browse/JCR-1470
Project: Jackrabbit
Issue Type: Bug
Components: observation
Affects Versions: 1.5
Environment: mac os leopard, java5
Reporter: Stephane Landelle
use case :
in the same transaction :
*) retrieve an object that has a collection of references, yet empty
*) add an element in the collection
*) update the object
consequence :
org.apache.jackrabbit.ocm.exception.ObjectContentManagerException: Cannot
insert collection field : authors of class com.weka.content.api.model.Folder;
nested exception is java.lang.NullPointerException: null
java.lang.NullPointerException
at
org.apache.jackrabbit.ocm.manager.collectionconverter.impl.ManageableArrayList$$EnhancerByCGLIB$$8f15dde4.getSize(<generated>)
at
org.apache.jackrabbit.ocm.manager.collectionconverter.impl.BeanReferenceCollectionConverterImpl.addUuidProperties(BeanReferenceCollectionConverterImpl.java:154)
at
org.apache.jackrabbit.ocm.manager.collectionconverter.impl.BeanReferenceCollectionConverterImpl.doUpdateCollection(BeanReferenceCollectionConverterImpl.java:101)
The failing line is in addUuidProperties :
Value[] values = new Value[collection.getSize()];
It seems the CGlib enhanced collection fails and needs to be initialized before.
For example, in doUpdateCollection, if I code :
// Delete existing values
if (parentNode.hasProperty(jcrName)) {
parentNode.setProperty(jcrName, (Value[]) null);
}
if (collection != null) {
collection.getSize(); <<<<<<
}
I get a NPE on collection.getSize();
but if I code :
if (collection != null) {
collection.getSize();
}
// Delete existing values
if (parentNode.hasProperty(jcrName)) {
parentNode.setProperty(jcrName, (Value[]) null);
}
everything runs fine?!
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