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
