We have a session-scoped managed bean that implements converter.
Whenever one of our objects goes into the getAsString method, we put
the object in a map keyed by its id. Then, when the getAsObject
method is called, we remove the object from the map and return it.
On Wed, 16 Mar 2005 22:25:56 +0000, Kostas Karadamoglou
<[EMAIL PROTECTED]> wrote:
> Sorry about my previous email, I didn't read it correctly!
>
> Another question if I don't bother you
>
> As far as I understood the methods getAsString and getAsObject
> serialize and deserialize an object isnt true?
> If yes then we send the object to the client and we don't keep it in the
> server. In your previous reply you send that
> MyFaces keeps the object in the memory but I cannot understand how it is
> done OR How I have to do it.
> Can you explain me this confusion that I have?
>
> Thank your in advance, Kostas
>
> Heath Borders wrote:
>
> >>It could be a good idea for JSF to store the objects in the server side and
> >>just submit an
> >>identifier to with the html. Once the request is received to the server JSF
> >>can indentify the
> >>referenced object by the identifier.
> >>
> >>
> >
> >We did exactly this.
> >
> >
> >
> >
> >On Wed, 16 Mar 2005 21:34:26 +0000, Kostas Karadamoglou
> ><[EMAIL PROTECTED]> wrote:
> >
> >
> >>In you previous message you said:
> >>
> >>We elected to keep
> >>everything in memory since we don't have that many concurrent users.
> >>
> >>I didn't understand it can you explain it?
> >>
> >>It could be a good idea for JSF to store the objects in the server side and
> >>just submit an
> >>identifier to with the html. Once the request is received to the server JSF
> >>can indentify the
> >>referenced object by the identifier.
> >>
> >>
> >>Heath Borders wrote:
> >>
> >>
> >>
> >>>Depending on the size of your object graph, you might run into
> >>>performance problems doing that. It really depends on your situation,
> >>>but that's something you could definitely try. We elected to keep
> >>>everything in memory since we don't have that many concurrent users.
> >>>
> >>>
> >>>On Wed, 16 Mar 2005 19:37:20 +0000, Kostas Karadamoglou
> >>><[EMAIL PROTECTED]> wrote:
> >>>
> >>>
> >>>
> >>>
> >>>>and what if my bean that I want to convert includes another nested
> >>>>objects?
> >>>>
> >>>>Is it a good idea to use libraries that serialize and deserialize object
> >>>>
> >>>>
> >>>>from and to xml?
> >>>
> >>>
> >>>>Heath Borders wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>getAsString converts the Object to a String and getAsObject converts
> >>>>>the String back to an Object.
> >>>>>
> >>>>>The behaviour should be like this:
> >>>>>
> >>>>>MyBean foo = // get a bean from somewhere
> >>>>>Converter converter = // get a converter that converts MyBeans.
> >>>>>String fooString = converter.getAsString(foo);
> >>>>>MyBean bar = converter.getAsObject(fooString);
> >>>>>
> >>>>>foo.equals(bar); // should return true.
> >>>>>
> >>>>>
> >>>>>Basically, the converter needs to convert an object to a String that
> >>>>>can be used later to recreate that Object. You can do this many
> >>>>>different ways. We have a unique id for every type of object and
> >>>>>store all objects in session. Our converter just returns that unique
> >>>>>id and pulls the objects from session using a Map.
> >>>>>
> >>>>>
> >>>>>On Wed, 16 Mar 2005 16:49:25 +0000, Kostas Karadamoglou
> >>>>><[EMAIL PROTECTED]> wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Hi again thank you for your reply,
> >>>>>>I am new to JSF so I need some information on how to create converters.
> >>>>>>Do you know any site one the internet that has such information?
> >>>>>>
> >>>>>>I have already looked on the internet but I only foound converters for
> >>>>>>String not for
> >>>>>>other classes.
> >>>>>>
> >>>>>>Can you give directions on how to implement the getAsString and
> >>>>>>getAsObject ?
> >>>>>>
> >>>>>>
> >>>>>>Heath Borders wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Yes, you must write a converter for Category.
> >>>>>>>
> >>>>>>>The object you pass as the 'value' of your SelectItem objects should
> >>>>>>>be of a type that is assignment-compatible with the property you've
> >>>>>>>bound to your component.
> >>>>>>>
> >>>>>>>
> >>>>>>>On Wed, 16 Mar 2005 10:05:13 +0000, Kostas Karadamoglou
> >>>>>>><[EMAIL PROTECTED]> wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>>Hello I have a problem with the selectItems tag
> >>>>>>>>Bellow I have the method that brings the value attribute of the tag:
> >>>>>>>>
> >>>>>>>>public List getCategories() {
> >>>>>>>> ArrayList retValue = new ArrayList();
> >>>>>>>> retValue.add(new SelectItem("","Choose a category..."));
> >>>>>>>> for(Iterator iter=this.eventRegistry.getCategories().iterator();
> >>>>>>>>iter.hasNext();){
> >>>>>>>> Category category=(Category)iter.next();
> >>>>>>>> retValue.add(new SelectItem(category,category.getTitle()));
> >>>>>>>> }
> >>>>>>>> return retValue;
> >>>>>>>>}
> >>>>>>>>
> >>>>>>>>When I run the web application I get the following exception:
> >>>>>>>>
> >>>>>>>>javax.faces.FacesException: There is no registered converter for class
> >>>>>>>>essex.cc403.hbeans.Category
> >>>>>>>>
> >>>>>>>>Do I really need to write a converter for the Category? Can I avoid
> >>>>>>>>it?
> >>>>>>>>Can you axplain me what I have to do because I am not familiar with
> >>>>>>>>JSF
> >>>>>>>>
> >>>>>>>>Thank you in advanec, kostas
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >
> >
> >
> >
>
>
--
-Heath Borders-Wing
[EMAIL PROTECTED]
