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

[Max Rydahl Andersen (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBIDE-3136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12437412#action_12437412 ] 

Max Rydahl Andersen commented on JBIDE-3136:
--------------------------------------------

Thanks for the examples - makes it much easier to relate ;)

It is definitly possible to create a "New Decorator wizard" that will pick up the current selection and add the Decorates field.

Alternatively we could just let users use the default "implement interface" wizard and have a refactor operation that checks that the class fullfill the Decorator needs and if somethings are missing add them (i.e. @Decorator and @Decorates)



> 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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