private String formatElement()

in hawtio-log/src/main/java/io/hawt/log/log4j/ThrowableFormatter.java [67:134]
58 lines of code
14 McCabe index (conditional complexity)

    private String formatElement(final Object element, final Map classMap) {
        StringBuffer buf = new StringBuffer("\tat ");
        buf.append(element);
        try {
            String className = getClassNameMethod.invoke(element, (Object[])null).toString();
            Object classDetails = classMap.get(className);
            if (classDetails != null) {
                buf.append(classDetails);
            } else {
                Class cls = findClass(className);
                int detailStart = buf.length();
                buf.append('[');
                String mavenCoordinates = MavenCoordHelper.getMavenCoordinates(cls);
                if (!Objects.isBlank(mavenCoordinates)) {
                    buf.append(mavenCoordinates);
                } else {
                    try {
                        CodeSource source = cls.getProtectionDomain().getCodeSource();
                        if (source != null) {
                            URL locationURL = source.getLocation();
                            if (locationURL != null) {
                                //
                                //   if a file: URL
                                //
                                if ("file".equals(locationURL.getProtocol())) {
                                    String path = locationURL.getPath();
                                    if (path != null) {
                                        //
                                        //  find the last file separator character
                                        //
                                        int lastSlash = path.lastIndexOf('/');
                                        int lastBack = path.lastIndexOf(File.separatorChar);
                                        if (lastBack > lastSlash) {
                                            lastSlash = lastBack;
                                        }
                                        //
                                        //  if no separator or ends with separator (a directory)
                                        //     then output the URL, otherwise just the file name.
                                        //
                                        if (lastSlash <= 0 || lastSlash == path.length() - 1) {
                                            buf.append(locationURL);
                                        } else {
                                            buf.append(path.substring(lastSlash + 1));
                                        }
                                    }
                                } else {
                                    buf.append(locationURL);
                                }
                            }
                        }
                    } catch (SecurityException ex) {
                    }
                    buf.append(':');
                    Package pkg = cls.getPackage();
                    if (pkg != null) {
                        String implVersion = pkg.getImplementationVersion();
                        if (implVersion != null) {
                            buf.append(implVersion);
                        }
                    }
                }
                buf.append(']');
                classMap.put(className, buf.substring(detailStart));
            }
        } catch (Exception ex) {
        }
        return buf.toString();
    }