private void handleFlawedHierarchy()

in src/main/java/org/apache/commons/logging/impl/LogFactoryImpl.java [1333:1405]
64 lines of code
12 McCabe index (conditional complexity)

    private void handleFlawedHierarchy(final ClassLoader badClassLoader, final Class badClass)
        throws LogConfigurationException {

        boolean implementsLog = false;
        final String logInterfaceName = Log.class.getName();
        final Class interfaces[] = badClass.getInterfaces();
        for (final Class element : interfaces) {
            if (logInterfaceName.equals(element.getName())) {
                implementsLog = true;
                break;
            }
        }

        if (implementsLog) {
            // the class does implement an interface called Log, but
            // it is in the wrong classloader
            if (isDiagnosticsEnabled()) {
                try {
                    final ClassLoader logInterfaceClassLoader = getClassLoader(Log.class);
                    logDiagnostic("Class '" + badClass.getName() + "' was found in classloader " +
                                  objectId(badClassLoader) + ". It is bound to a Log interface which is not" +
                                  " the one loaded from classloader " + objectId(logInterfaceClassLoader));
                } catch (final Throwable t) {
                    handleThrowable(t); // may re-throw t
                    logDiagnostic("Error while trying to output diagnostics about" + " bad class '" + badClass + "'");
                }
            }

            if (!allowFlawedHierarchy) {
                final StringBuilder msg = new StringBuilder();
                msg.append("Terminating logging for this context ");
                msg.append("due to bad log hierarchy. ");
                msg.append("You have more than one version of '");
                msg.append(Log.class.getName());
                msg.append("' visible.");
                if (isDiagnosticsEnabled()) {
                    logDiagnostic(msg.toString());
                }
                throw new LogConfigurationException(msg.toString());
            }

            if (isDiagnosticsEnabled()) {
                final StringBuilder msg = new StringBuilder();
                msg.append("Warning: bad log hierarchy. ");
                msg.append("You have more than one version of '");
                msg.append(Log.class.getName());
                msg.append("' visible.");
                logDiagnostic(msg.toString());
            }
        } else {
            // this is just a bad adapter class
            if (!allowFlawedDiscovery) {
                final StringBuilder msg = new StringBuilder();
                msg.append("Terminating logging for this context. ");
                msg.append("Log class '");
                msg.append(badClass.getName());
                msg.append("' does not implement the Log interface.");
                if (isDiagnosticsEnabled()) {
                    logDiagnostic(msg.toString());
                }

                throw new LogConfigurationException(msg.toString());
            }

            if (isDiagnosticsEnabled()) {
                final StringBuilder msg = new StringBuilder();
                msg.append("[WARNING] Log class '");
                msg.append(badClass.getName());
                msg.append("' does not implement the Log interface.");
                logDiagnostic(msg.toString());
            }
        }
    }