public ElementRef getElementRef ( ) throws IllegalStateException { Page p = page ; if ( p == null ) throw new IllegalStateException ( "page not set" ) ; PageRef pageRef = p . getPageRef ( ) ; String i = getId ( ) ; if ( i == null ) throw new IllegalStateException ( "page not set so no id generated" ) ; ElementRef er = elementRef ; if ( er == null // Make sure object still valid || ! er . getPageRef ( ) . equals ( pageRef ) || ! er . getId ( ) . equals ( i ) ) { er = new ElementRef ( pageRef , i ) ; elementRef = er ; } return er ; }
Gets an ElementRef for this element . Must have a page set . If id has not yet been set one will be generated .