private ClassLoader createLoader()

in tools/cli/src/main/java/org/apache/batchee/cli/command/JobOperatorCommand.java [235:297]
53 lines of code
18 McCabe index (conditional complexity)

    private ClassLoader createLoader(final ClassLoader parent) throws MalformedURLException {
        final Collection<URL> urls = new LinkedList<URL>();

        if (libs != null) {
            final File folder = new File(libs);
            if (folder.exists()) {
                addFolder(folder, urls);
            }
        }

        // we add libs/*.jar and libs/xxx/*.jar to be able to sort libs but only one level to keep it simple
        File resources = null;
        File exploded = null;
        if (archive != null) {
            final File bar = new File(archive);
            if (bar.exists()) {
                if (bar.isFile()) { // bar to unzip
                    exploded = new File(work, bar.getName());
                } else if (bar.isDirectory()) { // already unpacked
                    exploded = bar;
                } else {
                    throw new IllegalArgumentException("unsupported archive type for: '" + archive + "'");
                }

                // try for 3 seconds to explode the archive
                for (int i=0; i<60 && !explode(bar, exploded); i++) {
                    try {
                        Thread.sleep(50L);
                    }catch (InterruptedException e) {
                        // ok
                    }
                }

                if (archive.endsWith(".bar") || new File(exploded, "BATCH-INF").exists()) {
                    // bar archives are split accross 3 folders
                    addFolder(new File(exploded, "BATCH-INF/classes"), urls);
                    addFolderIfExist(new File(exploded, "BATCH-INF/lib"), urls);
                    resources = new File(exploded, "BATCH-INF");
                } else if (archive.endsWith(".war") || new File(exploded, "WEB-INF").exists()) {
                    addFolderIfExist(new File(exploded, "WEB-INF/classes"), urls);
                    addLibs(new File(exploded, "WEB-INF/lib"), urls);
                } else {
                    throw new IllegalArgumentException("unknown or unsupported archive type: " + archive);
                }
            } else {
                throw new IllegalArgumentException("'" + archive + "' doesn't exist");
            }
        }

        final ClassLoader sharedClassLoader = createSharedClassLoader(parent);
        if (libs == null && archive == null) {
            return sharedClassLoader;
        }

        final ChildFirstURLClassLoader classLoader = new ChildFirstURLClassLoader(urls.toArray(new URL[urls.size()]), sharedClassLoader);
        if (resources != null && resources.exists()) {
            classLoader.addResource(resources);
        }
        if (exploded != null) {
            classLoader.setApplicationFolder(exploded);
        }
        return classLoader;
    }