[jbosstools-issues] [JBoss JIRA] Commented: (JBIDE-3136) New decorator from existing Web Bean

[Dan Allen (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBIDE-3136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12437398#action_12437398 ] 

Dan Allen commented on JBIDE-3136:
----------------------------------

My focus is on getting that @Decorates field created at the time the class is created through the use of an Eclipse form. It's also I think about raising awareness for the decorator.

So the idea would be, I have a Web Bean open and a right click on an interface and say "create decorator for interface". Then I get the standard class-from-interface dialogs. But when the class is created, it has a
@Decorates field that matches the Web Bean I had opened. Perhaps I can even pick which methods I want to decorate and the body is filled out with a call to the target method.

> New decorator from existing Web Bean
> ------------------------------------
>
>                 Key: JBIDE-3136
>                 URL: https://jira.jboss.org/jira/browse/JBIDE-3136
>             Project: Tools (JBoss Tools)
>          Issue Type: Feature Request
>          Components: webbeans
>            Reporter: Dan Allen
>             Fix For: LATER
>
>
> Suppose we have an interface that represents accounts:
> public interface Account {
>     public BigDecimal getBalance();
>     public User getOwner();
>     public void withdraw(BigDecimal amount);
>     public void deposit(BigDecimal amount);
> }
> A decorator is a simple Web Bean that implements the type it decorates and is annotated @Decorator.
> @Decorator
> public abstract class LargeTransactionDecorator 
>         implements Account {
>     
>     @Decorates Account account;
>     
>     @PersistenceContext EntityManager em;
>     
>     public void withdraw(BigDecimal amount) {
>         account.withdraw(amount);
>         if ( amount.compareTo(LARGE_AMOUNT)>0 ) {
>             em.persist( new LoggedWithdrawl(amount) );
>         }
>     }
>     
>     public void deposit(BigDecimal amount);
>         account.deposit(amount);
>         if ( amount.compareTo(LARGE_AMOUNT)>0 ) {
>             em.persist( new LoggedDeposit(amount) );
>         }
>     }
>     
> }
> The tooling would not only help you create the class that acts as the decorator, but make sure that it implements the same interfaces as the Web Beans and injects the Web Bean into a @Decorates field.

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