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Posted to graffito-dev@incubator.apache.org by "Christophe Lombart (JIRA)" <ji...@apache.org> on 2006/10/18 20:40:38 UTC
[jira] Assigned: (GRFT-111) Extend Bean/Collection/FieldDescriptor
with support for node type management tools
[ http://issues.apache.org/jira/browse/GRFT-111?page=all ]
Christophe Lombart reassigned GRFT-111:
---------------------------------------
Assignee: Christophe Lombart
> Extend Bean/Collection/FieldDescriptor with support for node type management tools
> ----------------------------------------------------------------------------------
>
> Key: GRFT-111
> URL: http://issues.apache.org/jira/browse/GRFT-111
> Project: Graffito
> Issue Type: Improvement
> Reporter: Felix Meschberger
> Assigned To: Christophe Lombart
> Attachments: GRFT-111.zip, NodeTypeManagerImpl.java
>
>
> I started working with Graffito JCR-Mapping some weeks ago noticing that it actually implements what I planned to implement in my own tool - and more :-) So I started to like that thing. While working on it I thought, that it would be nice to define node types based on the mapping definitions and also noticed, that this is actually also supported by the mapping descriptors.
> Still, the support by the descriptors has some drawbacks: Field descriptors are thought to only map to properties, while collection and bean descriptors are thought to only map to child nodes. Consequently the field descriptors support attributes for property definition while bean and collection definitions support attributes for child node definition. While this assumption is mostly true, it fails in the case of multi-valued properties, which is implemented using a collection descriptor. I myself implemented another CollectionConverter, which supports residual jcrName values. Also in this case, the collection descriptor maps properties.
> Hence I proopse to extend the bean and collection descriptors with attributes for property definition. Namely I propose the addition of "jcrType" and "jcrMultiple" attributes which should contain the property type and multi-value flag respectively. The respective BeanDescriptor and CollectionDescriptor classes are to be extended for these attributes.
> To further simplify node type management tools, I further propose, to define two interfaces - PropertyDefDescriptor and ChildNodeDefDescriptor - which may be used by node type management tools to extract the relevant information to define properties and child nodes. The FieldDescriptor will only implement the PropertyDefDescriptor while the BeanDescriptor and CollectionDescriptor classes will implement both interfaces. The node type management tool will then have to apply heuristics to decide, whether a property or a child node should be defined.
> Attached you will find the patchs to the FieldDescriptor, BeanDescriptor and CollectionDescriptor classes as well as the proposed interfaces.
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