public Permissions get()

in src/main/java/org/apache/commons/jexl3/introspection/JexlSandbox.java [644:685]
36 lines of code
14 McCabe index (conditional complexity)

    public Permissions get(final Class<?> clazz) {
        Permissions permissions = clazz == null ? BLOCK_ALL : sandbox.get(clazz.getName());
        if (permissions == null) {
            if (inherit) {
                // find first inherited interface that defines permissions
                for (final Class<?> inter : clazz.getInterfaces()) {
                    permissions = sandbox.get(inter.getName());
                    if (permissions != null) {
                        if (permissions.isInheritable()) {
                            break;
                        }
                        permissions = null;
                    }
                }
                // nothing defined yet, find first superclass that defines permissions
                if (permissions == null) {
                    // lets walk all super classes
                    Class<?> zuper = clazz.getSuperclass();
                    // walk all superclasses
                    while (zuper != null) {
                        permissions = sandbox.get(zuper.getName());
                        if (permissions != null) {
                            if (permissions.isInheritable()) {
                                break;
                            }
                            permissions = null;
                        }
                        zuper = zuper.getSuperclass();
                    }
                }
                // nothing was inheritable
                if (permissions == null) {
                    permissions = allow ? ALLOW_ALL : BLOCK_ALL;
                }
                // store the info to avoid doing this costly look up
                sandbox.put(clazz.getName(), permissions);
            } else {
                permissions = allow ? ALLOW_ALL : BLOCK_ALL;
            }
        }
        return permissions;
    }