public static Collection getBlueprintDescriptors()

in components/camel-blueprint-main/src/main/java/org/apache/camel/blueprint/CamelBlueprintHelper.java [513:566]
47 lines of code
14 McCabe index (conditional complexity)

    public static Collection<URL> getBlueprintDescriptors(String descriptors) throws FileNotFoundException, MalformedURLException {
        List<URL> answer = new ArrayList<>();
        if (descriptors != null) {
            // there may be more resources separated by comma
            Iterator<?> it = ObjectHelper.createIterator(descriptors);
            while (it.hasNext()) {
                String s = (String) it.next();
                LOG.trace("Resource descriptor: {}", s);

                // remove leading / to be able to load resource from the classpath
                s = FileUtil.stripLeadingSeparator(s);

                // if there is wildcards for *.xml then we need to find the urls from the package
                if (s.endsWith("*.xml")) {
                    String packageName = s.substring(0, s.length() - 5);
                    // remove trailing / to be able to load resource from the classpath
                    Enumeration<URL> urls = org.apache.camel.util.ObjectHelper.loadResourcesAsURL(packageName);
                    while (urls.hasMoreElements()) {
                        URL url = urls.nextElement();
                        File dir = new File(url.getFile());
                        if (dir.isDirectory()) {
                            File[] files = dir.listFiles();
                            if (files != null) {
                                for (File file : files) {
                                    if (file.isFile() && file.exists() && file.getName().endsWith(".xml")) {
                                        String name = packageName + file.getName();
                                        LOG.debug("Resolving resource: {}", name);
                                        URL xmlUrl = org.apache.camel.util.ObjectHelper.loadResourceAsURL(name);
                                        if (xmlUrl != null) {
                                            answer.add(xmlUrl);
                                        }
                                    }
                                }
                            }
                        }
                    }
                } else {
                    LOG.debug("Resolving resource: {}", s);
                    URL url = RESOLVER.loadResourceAsURL(s);
                    if (url == null) {
                        throw new FileNotFoundException("Resource " + s + " not found");
                    }
                    answer.add(url);
                }
            }
        } else {
            throw new IllegalArgumentException("No bundle descriptor configured. Override getBlueprintDescriptor() or getBlueprintDescriptors() method");
        }

        if (answer.isEmpty()) {
            throw new IllegalArgumentException("Cannot find any resources in classpath from descriptor " + descriptors);
        }
        return answer;
    }