private boolean installBundle()

in src/main/java/org/apache/sling/launchpad/base/impl/BootstrapInstaller.java [425:516]
65 lines of code
10 McCabe index (conditional complexity)

    private boolean installBundle(final File bundleJar,
            final int startLevel,
            final Map<String, Bundle> currentBundles,
            final List<Bundle> installed) {
        // get the manifest for the bundle information
        Manifest manifest = getManifest(bundleJar);
        if (manifest == null) {
            logger.log(Logger.LOG_ERROR, "Ignoring " + bundleJar
                + ": Cannot read manifest");
            return false; // SHORT CIRCUIT
        }

        // ensure a symbolic name in the jar file
        String symbolicName = getBundleSymbolicName(manifest);
        if (symbolicName == null) {
            logger.log(Logger.LOG_ERROR, "Ignoring " + bundleJar
                + ": Missing " + Constants.BUNDLE_SYMBOLICNAME
                + " in manifest");
            return false; // SHORT CIRCUIT
        }

        // check for an installed Bundle with the symbolic name
        Bundle installedBundle = currentBundles.get(symbolicName);
        if (ignore(installedBundle, manifest)) {
            logger.log(Logger.LOG_INFO, "Ignoring " + bundleJar
                + ": More recent version already installed");
            return false; // SHORT CIRCUIT
        }

        // try to access the JAR file, ignore if not possible
        InputStream ins;
        try {
            ins = new FileInputStream(bundleJar);
        } catch (FileNotFoundException e) {
            return false; // SHORT CIRCUIT
        }

        final boolean requireRestart;
        if (installedBundle != null) {

            // if the installed bundle is an extension fragment we have to
            // restart the framework after completing the installation
            // or upgrade of all new bundles
            requireRestart = isSystemBundleFragment(installedBundle);

            try {
                installedBundle.update(ins);
                logger.log(Logger.LOG_INFO, "Bundle "
                    + installedBundle.getSymbolicName()
                    + " updated from " + bundleJar);

                // optionally set the start level
                if (startLevel > 0) {
                    installedBundle.adapt(BundleStartLevel.class).setStartLevel(startLevel);
                }
            } catch (BundleException be) {
                logger.log(Logger.LOG_ERROR, "Bundle update from "
                    + bundleJar + " failed", be);
            }

        } else {

            // restart is not required for any bundle installation at this
            // stage
            requireRestart = false;

            // install the JAR file as a bundle
            String path = bundleJar.getPath();
            String location = SCHEME
                + path.substring(path.lastIndexOf('/') + 1);
            try {
                Bundle theBundle = bundleContext.installBundle(location, ins);
                logger.log(Logger.LOG_INFO, "Bundle "
                    + theBundle.getSymbolicName() + " installed from "
                    + location);

                // finally add the bundle to the list for later start
                installed.add(theBundle);

                // optionally set the start level
                if (startLevel > 0) {
                    theBundle.adapt(BundleStartLevel.class).setStartLevel(startLevel);
                }

            } catch (BundleException be) {
                logger.log(Logger.LOG_ERROR,
                    "Bundle installation from " + location + " failed", be);
            }
        }

        return requireRestart;
    }