[jira] [Resolved] (FELIX-6015) IndexOutOfBoundsException due a missing HostNamespace.HOST_NAMESPACE

["Cristiano Gavião (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FELIX-6015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Cristiano Gavião resolved FELIX-6015.
-------------------------------------
    Resolution: Invalid

> IndexOutOfBoundsException due a missing HostNamespace.HOST_NAMESPACE
> --------------------------------------------------------------------
>
>                 Key: FELIX-6015
>                 URL: https://issues.apache.org/jira/browse/FELIX-6015
>             Project: Felix
>          Issue Type: Bug
>          Components: Resolver
>    Affects Versions: resolver-1.16.0
>            Reporter: Cristiano Gavião
>            Priority: Major
>
> When creating a custom ResolveContext we need to build a collection of mandatory resources using the method getMandatoryResources().
>  Normally we will create such collection using a custom built Resource containing only a IdentityNamespace.IDENTITY_NAMESPACE capability, because it is enough in order to search for more details of such resource in the installed bundles/fragments or in the registered bundle repositories inside the findProviders() method.
> The error that I'm getting is due the fact that the resolver, most precisely, the Candidates class is using getMandatoryResources() after the getInitialCandidates(session) been executed and inferring that it has a information about fragments that it doesn't have.
> {code:java}
>     public Map<Resource, Resource> getRootHosts()
>     {
>         Map<Resource, Resource> hosts = new LinkedHashMap<Resource, Resource>();
>         for (Resource res : *m_session.getMandatoryResources()*)
>         {
>             addHost(res, hosts);
>         }
>         for (Resource res : m_session.getOptionalResources())
>         {
>             if (isPopulated(res)) {
>                 addHost(res, hosts);
>             }
>         }
>         return hosts;
>     }
> {code}
> {code:java}
>     private void addHost(Resource res, Map<Resource, Resource> hosts) {
>         if (res instanceof WrappedResource)
>         {
>             res = ((WrappedResource) res).getDeclaredResource();
>         }
>         if (!Util.isFragment(res))
>         {
>             hosts.put(res, getWrappedHost(res));
>         } else {
> // The error is happening here:
>             *Requirement hostReq = res.getRequirements(HostNamespace.HOST_NAMESPACE).get(0);*
>             Capability hostCap = getFirstCandidate(hostReq);
>             // If the resource is an already resolved fragment and can not
>             // be attached to new hosts, there will be no matching host,
>             // so ignore this resource
>             if (hostCap != null) {
>                 res = getWrappedHost(hostCap.getResource());
>                 if (res instanceof WrappedResource) {
>                     hosts.put(((WrappedResource) res).getDeclaredResource(), res);
>                 }
>             }
>         }
>     }
> {code}
> Wouldn't be possible to use the processed initial candidates resources instead ?



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