[shrinkwrap-issues] [JBoss JIRA] (SHRINKDESC-119) Create a Builder SPI

[Aslak Knutsen (JIRA)]

    [ https://issues.jboss.org/browse/SHRINKDESC-119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12698499#comment-12698499 ] 

Aslak Knutsen commented on SHRINKDESC-119:
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Just to note: The original API proposal was built on the idea that the Descriptor API would be completely different from what it is now. This 'prototype' should not be used as is, but rather as a concept idea. 

The general idea would be; we need a way to plug in 'builders' to write parts of the Descriptor based on reading some external data source, e.g. Class level annotations. These builds should be capable of reasoning on the the structure of the core Descriptor and relations between elements. e.g. Adding a Class as a Servlet could write both Servlet and Servlet Mapping information to the Descriptor.
                
> Create a Builder SPI
> --------------------
>
>                 Key: SHRINKDESC-119
>                 URL: https://issues.jboss.org/browse/SHRINKDESC-119
>             Project: ShrinkWrap Descriptors
>          Issue Type: Feature Request
>            Reporter: Andrew Rubinger
>
> Apart from the SWD object model, we could make it much easier to populate the metadata by introducing a "Builder" (name to be discussed) SPI.  The purpose here would be a pluggable mechanism to accomplish code like the following:
> {code}WebAppDescriptor desc = create(WebAppDescriptor.class)
>          .add(type(Servlet.class)
>                 .className("com.acme.MyServlet")
>                 .name("MyServletName"))
>          .add(build(Servlet.class)
>                  .from(MyServlet.class));{code}
> Here the WepAppDescriptor gets data added by scanning in annotations observed on the user's MyServlet, relieving the user of supplying the configuration manually.
> A more full example is detailed in this Gist contributed by Aslak:
> https://gist.github.com/1025597

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