@AfterCompose"
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| 6.0.2 | | 6.0.2 | ||
| June 2012 | | June 2012 | ||
− | | The | + | | The @AfterCompose was introduced. |
|} | |} | ||
Revision as of 03:51, 10 July 2012
since 6.0.2
Syntax
@AfterCompose
@AfterCompose(superclass=true)
Description
Target: method, class
Purpose: Marker annotation to identify a life cycle method which will be invoked in doAfterCompose() of BindComposer.
Only one @AfterCompose-annotated method is allowed in a ViewModel class. If you set annotation element superclass to true, the ViewModel's parent class's @AfterCompose-annotated method will be invoked first then child's, and this logic repeat on super class. If a class has no method with @AfterCompose, no method will be called (including the super class's) [1].
For example, in class hierarchy A(has @AfterCompose) <- B(has @AfterCompose) <- C(no @AfterCompose) <- D (has @AfterCompose, superclass=true). D is the last child class.
- When BindComposer start to handle D while in doAfterCompose(), it will call D's @AfterCompose method.
- When BindComposer reaches C, no method will be called.
- When BindComposer reaches B , it will call As' then B's.
- When BindComposer reaches A, it will call A's.
We also can use parameter related annotation on AfterCompose method's parameters just as what we can do in @Init, please refer to subsections of ZK Developer's Reference/MVVM/Syntax/ViewModel/Parameters.
- ↑ If you override parent class's @AfterCompose-annotated method e.g. Parent.m1() <- Child.m1(). Because of Java's limitation, BindComposer still call Child.m1(), and Child.m1() will be called twice. To avoid this, you should set superclass=false for Child.m1() and call super.m1() inside it.
Example
public class FooViewModel{
@AfterCompose
public void doFoo(){
//do while AfterCompose
}
}
public class BarViewModel extends FooViewModel{
@AfterCompose(superclass=true)
public void afterComposeBar(){
//AfterCompose method of super class FooViewModel will be called first.
}
}
@AfterCompose(superclass=true)
public class ChildViewModel extends BarViewModel{
}
Version History
Version | Date | Content |
---|---|---|
6.0.2 | June 2012 | The @AfterCompose was introduced. |