protected final ArtifactResult turnJarToNbmFile()

in nbm-maven-plugin/src/main/java/org/apache/netbeans/nbm/AbstractNbmMojo.java [392:467]
64 lines of code
12 McCabe index (conditional complexity)

    protected final ArtifactResult turnJarToNbmFile( Artifact art, ArtifactFactory artifactFactory,
                                                     ArtifactResolver artifactResolver, MavenProject project,
                                                     ArtifactRepository localRepository )
            throws MojoExecutionException
    {
        if ( "jar".equals( art.getType() ) || "nbm".equals( art.getType() ) )
        {
            //TODO, it would be nice to have a check to see if the
            // "to-be-created" module nbm artifact is actually already in the
            // list of dependencies (as "nbm-file") or not..
            // that would be a timesaver
            ExamineManifest mnf = new ExamineManifest( getLog() );
            File jar = art.getFile();
            if ( !jar.isFile() )
            {
                //MNBMODULE-210 with recent CoS changes in netbeans (7.4) jar will be file as we link open projects in
                // the build via WorkspaceReader.
                // That's fine here, as all we need is to know if project is osgi or nbm module.
                // the nbm file has to be in local repository though.
                String path = localRepository.pathOf( art );
                File jar2 = new File( localRepository.getBasedir(), path.replace( "/", File.separator ) );
                File manifest = new File( jar, "META-INF/MANIFEST.MF" );

                if ( !jar2.isFile() || !manifest.isFile() )
                {
                    getLog().warn( "MNBMODULE-131: need to at least run install phase on " + jar2 );
                    return new ArtifactResult( null, null );
                }
                mnf.setManifestFile( manifest );
            }
            else
            {
                mnf.setJarFile( jar );
            }
            mnf.checkFile();
            if ( mnf.isNetBeansModule() )
            {
                Artifact nbmArt = artifactFactory.createDependencyArtifact(
                        art.getGroupId(),
                        art.getArtifactId(),
                        art.getVersionRange(),
                        "nbm-file",
                        art.getClassifier(),
                        art.getScope() );
                try
                {
                    artifactResolver.resolve( nbmArt, project.getRemoteArtifactRepositories(), localRepository );
                }

                catch ( ArtifactResolutionException ex )
                {
                    //shall be check before actually resolving from repos?
                    checkReactor( art, nbmArt );
                    if ( !nbmArt.isResolved() )
                    {
                        throw new MojoExecutionException( "Failed to retrieve the nbm file from repository", ex );
                    }
                }
                catch ( ArtifactNotFoundException ex )
                {
                    //shall be check before actually resolving from repos?
                    checkReactor( art, nbmArt );
                    if ( !nbmArt.isResolved() )
                    {
                        throw new MojoExecutionException( "Failed to retrieve the nbm file from repository", ex );
                    }
                }
                return new ArtifactResult( nbmArt, mnf );
            }
            if ( mnf.isOsgiBundle() )
            {
                return new ArtifactResult( null, mnf );
            }
        }
        return new ArtifactResult( null, null );
    }