question: private boolean hasKeyAttributes ( ) { Boolean b = hasKeyAttributes ; if ( b == null ) { synchronized ( this ) { String s ; s = getAttribute ( "SupportedKeyFormats" ) ; if ( s != null ) { supportedFormats = s . split ( "\\|" ) ; } s = getAttribute ( "SupportedKeyClasses" ) ; if ( s != null ) { String [ ] classNames = s . split ( "\\|" ) ; List < Class < ? > > classList = new ArrayList < > ( classNames . length ) ; for ( String className : classNames ) { Class < ? > clazz = getKeyClass ( className ) ; if ( clazz != null ) { classList . add ( clazz ) ; } } supportedClasses = classList . toArray ( CLASS0 ) ; } boolean bool = ( supportedFormats != null ) || ( supportedClasses != null ) ; b = Boolean . valueOf ( bool ) ; hasKeyAttributes = b ; } } return b . booleanValue ( ) ; }
target:  Return whether this service has its Supported* properties for keys defined. Parses the attributes if not yet initialized.