RE: How to implement 'back' button

[Yee CN]

Thanks Cenk, I fond this web page after you email. There are some limitations with the scheme as I stated in my last post, which I think can be fixed. Sorry I misquoted your name in my last positing.   Regards, Yee   From: Cenk Çivici [mailto:[EMAIL PROTECTED] Sent: Friday, 6 January 2006 7:07 PM To: MyFaces Discussion; [EMAIL PROTECTED] Subject: Re: How to implement 'back' button   http://www.jroller.com/comments/cenkcivici/Weblog/custom_jsf_navigation_handler_for contains an implementation for this requirement.   -Cenk Çivici   On 1/6/06, Yee CN <[EMAIL PROTECTED]> wrote: Hi,   I am thinking of providing a 'back' button on all my pages. Below is a sketch on how I intended to do it, but before embarking on it I would like to know whether anybody has done similar and to hear from you Gurus whether my approach is workable.   1) I have a stack<backingBean, nagivgationResult> to store the pages being visited and the associated backing bean.     The stack will be limited to store (say) the last 10 pages visited, so it won't grow continuously. I think a circular list could probably be used for this.   2) A phase listener will push the current page's backing bean and navigation to the stack; it will happen at the AFTER RENDER_RESPONSE phase.   3) The 'back' button will pop the stack – restores the backing bean and navigates back to the page concerned.   4) Some pages can be marked to not to participate in this scheme.   I am assuming a) the beans are in request scope, b) there is only one backing bean per page. For session scope beans I would have to serialize the bean.   Please – any comments?   Best regards, Yee       // getting an restoring a manage bean public static Object getManagedBean(String beanName) {             Object o = getValueBinding( "#{" + beanName + "}" ).getValue(FacesContext.getCurrentInstance());             return o; }              public static void setManageBean(String beanName, Object bean) {             getValueBinding( "#{" + beanName + "}" ).setValue(FacesContext.getCurrentInstance(), bean); }   // some helper methods private static Application getApplication() {             ApplicationFactory appFactory = (ApplicationFactory)FactoryFinder.getFactory(FactoryFinder.APPLICATION_FACTORY);             return appFactory.getApplication(); }             private static ValueBinding getValueBinding(String el) {             return getApplication().createValueBinding(el); }             private static Object getElValue(String el) {             return getValueBinding(el).getValue(FacesContext.getCurrentInstance()); }