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Central module for Tapestry, containing interfaces to the Java Servlet API and all core services and components.

There is a newer version: 5.8.6


    
        

            

                
    
        Welcome!

        
            Welcome back, ${user.firstName}
            
                Login /
                Register
            
        
        
        . . .

]]>

Here, the main text is rendered if the user is logged in (the user property will
be non-null after the user logs in). Otherwise, links to a login and register
page are rendered.


Note the use of the
p:
namespace (new in Tapestry 5.1). In 5.0, this would be
<t:parameter name="else">.





Tapestry has many built in coercions to boolean:


String
True if non-blank and not the literal string "false" (case insensitive)
Number
True if non-zero
Collection
True if non-empty
Object
True (as long as its not null)