protected final ArtifactResult turnJarToNbmFile()

in nbm-maven-plugin/src/main/java/org/apache/netbeans/nbm/AbstractNbmMojo.java [310:369]
49 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);
    }