[jboss-jira] [JBoss JIRA] Assigned: (JBCL-137) Support for OSGi Fragments

[Ales Justin (JIRA)]

     [ https://jira.jboss.org/browse/JBCL-137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ales Justin reassigned JBCL-137:
--------------------------------

    Assignee: Ales Justin


> Support for OSGi Fragments
> --------------------------
>
>                 Key: JBCL-137
>                 URL: https://jira.jboss.org/browse/JBCL-137
>             Project: JBoss ClassLoader
>          Issue Type: Feature Request
>            Reporter: Thomas Diesler
>            Assignee: Ales Justin
>
> Fragments are bundles that can be attached to one or more host bundles by the
> Framework. Attaching is done as part of resolving: the Framework appends
> the relevant definitions of the fragment bundles to the host's definitions
> before the host is resolved. Fragments are therefore treated as part of the
> host, including any permitted headers; they must not have their own class
> loader though fragments must have their own Protection Domain.
>        When attaching a fragment bundle to a host bundle the Framework must
>        perform the following steps:
>        1 Append the import definitions for the Fragment bundle that do not con-
>           flict with an import definition of the host to the import definitions of the
>           host bundle. A Fragment can provide an import statement for a private
>           package of the host. The private package in the host is hidden in that
>           case.
>                 2 Append the Require-Bundle entries of the fragment bundle that do not
>                     conflict with a Require-Bundle entry of the host to the Require-Bundle
>                     entries of the host bundle.
>                 3 Append the export definitions of a Fragment bundle to the export defini-
>                     tions of the host bundle unless the exact definition (directives and
>                     attributes must match) is already present in the host. Fragment bundles
>                     can therefore add additional exports for the same package name. The
>                     bundle-version attributes and bundle-symbolic-name attributes will
>                     reflect the host bundle.
>                 A host and a fragment conflict when they cannot resolve to provide a consis-
>                 tent class space. If a conflict is found, the Fragment bundle is not attached to
>                 the host bundle.
>                 A Fragment bundle must enter the resolved state only if it has been success-
>                 fully attached to at least one host bundle.
>                 During runtime, the fragment's JAR is searched after the host's bundle class
>                 path

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