@AfterCompose"

From Documentation
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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.
 
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 doAfterCompose, it will call D's AfterCompose method.
+
* When <javadoc>org.zkoss.bind.BindComposer</javadoc> start to handle D while doAfterCompose, it will call D's AfterCompose method.
* When binder reaches C, no method will be called.
+
* When <javadoc>org.zkoss.bind.BindComposer</javadoc> reaches C, no method will be called.
* When binder reaches B , it will call As' then B's.  
+
* When <javadoc>org.zkoss.bind.BindComposer</javadoc> reaches B , it will call As' then B's.  
* When binder reaches A, it will call A's.
+
* When <javadoc>org.zkoss.bind.BindComposer</javadoc> 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]].
 
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]].

Revision as of 02:03, 28 June 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 during BindComposer's doAfterCompose invocation.

Only one or none AfterCompose method is allowed in a ViewModel class. If you set annotation element superclass to true, the ViewModel's parent class's ini 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 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.


  1. If you override parent class's AfterCompose method e.g. Parent.m1() <- Child.m1(). Because of Java's limitation, binder still call Child.m1(), and Child.m1() will be called twice. To avoid this, you should set superclass to false of 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.
	}
}

//since 6.0.2
@AfterCompose(superclass=true)
public class ChildViewModel extends BarViewModel{

}

Version History

Last Update : 2012/06/28


Version Date Content
6.0.2 June 2012 The MVVM was introduced.




Last Update : 2012/06/28

Copyright © Potix Corporation. This article is licensed under GNU Free Documentation License.