[forge-issues] [JBoss JIRA] (FORGE-773) entities for scaffold could be binary, not source

[Lincoln Baxter III (JIRA)]

    [ https://issues.jboss.org/browse/FORGE-773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12751719#comment-12751719 ] 

Lincoln Baxter III commented on FORGE-773:
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Yes, this would be a very nice thing to fix. I think in order to do this, we would need to classload the entire project, then use Java Reflection to handle this. It's certainly possible, but a big endeavor. Thoughts?
                
> entities for scaffold could be binary, not source
> -------------------------------------------------
>
>                 Key: FORGE-773
>                 URL: https://issues.jboss.org/browse/FORGE-773
>             Project: Forge
>          Issue Type: Feature Request
>            Reporter: John Franey
>
> I have already a jar file full of JPA entity classes, built by another project.  To generate scaffold on forge 1.2.1, I create a forge project and unpack the source code of the jpa project into the forge project, then I can run the scaffold.
> I'd like a parameter to accept a dependency and a package or class name: scaffold from-entity [groupId:artifactId:]entity-name
> if groupId:artifactId were provided, then the plugin would find that dependency, open that jar and look for the class(es) with that name, convert those to JavaClass implementation that wraps a java.lang.Class and call the scaffold provider.
> FacesScaffold facet operates on JavaClass.  Thanks to architects that made this an interface, its not hard to implement as a wrapper to java.lang.Class; same for other interfaces in forge's java api.  In other words, using these wrappers, FacesScaffold can operate on java class data.
> However, there seem to be a few roadblocks for me:
> # The ScaffoldPlugin can accept a JavaResource, a source file.  There is no method on the plugin to accept a JavaClass  Is it possible to override, perhaps by defining a brand new plugin that derives from ScaffoldPlugin and provides the method that accepts a JavaClass?
> # The ShellImpl has a fixed conversion from string to JavaResource.  Is it possible to provide a custom conversion in order for the shell to call a plugin method with a JavaCLass parameter?
> # The Dependency facet does not have a method that gives access to the jar file of the dependency.  I'm not confident that getSystemPath() returns the path to the actual jar file.  This data derives from the apache Maven's method Dependency.getSystemPath() which has a javadoc saying: "don't call this method."  I think Eclipse and maven have different dependency resolution mechanisms, so this facet would be different in each.
> Have I read the forge code wrong?  Is there a roadmap that navigates these issues?

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