public static T newInstance()

in apache-rat-plugin/src/main/java/org/apache/rat/mp/util/ConfigurationHelper.java [31:59]

28 lines of code
6 McCabe index (conditional complexity)


    public static <T> T newInstance(final Class<T> clazz, final String className)
            throws MojoExecutionException, MojoFailureException {
        try {
            final ClassLoader cl = Thread.currentThread()
                    .getContextClassLoader();
            @SuppressWarnings("unchecked") // incorrect cast will be caught below
            final T o = (T) cl.loadClass(className).newInstance();

            if (!clazz.isAssignableFrom(o.getClass())) {
                throw new MojoFailureException("The class "
                        + o.getClass().getName() + " does not implement "
                        + clazz.getName());
            }
            return o;
        } catch (final InstantiationException e) {
            throw new MojoExecutionException("Failed to instantiate class "
                    + className + ": " + e.getMessage(), e);
        } catch (final ClassCastException e) {
            throw new MojoExecutionException("The class " + className
                    + " is not implementing " + clazz.getName() + ": "
                    + e.getMessage(), e);
        } catch (final IllegalAccessException e) {
            throw new MojoExecutionException("Illegal access to class "
                    + className + ": " + e.getMessage(), e);
        } catch (final ClassNotFoundException e) {
            throw new MojoExecutionException("Class " + className
                    + " not found: " + e.getMessage(), e);
        }
    }