digester.setUseContextClassLoader(true);
digester.setValidating(validating);
// realms
digester.addObjectCreate("securityfilter-config/realm", null, "className");
digester.addSetProperty("securityfilter-config/realm/realm-param", "name", "value");
digester.addSetNext("securityfilter-config/realm", "addRealm", "java.lang.Object");
// auth method, realm name
digester.addCallMethod("securityfilter-config/login-config/auth-method", "setAuthMethod", 0);
digester.addCallMethod("securityfilter-config/login-config/realm-name", "setRealmName", 0);