RE: getChildren().iterator() problem

2006-04-21 Thread Jesse Alexander \(KSFD 121\) 



I usually prefer the while-loop for this kind of 
operation:

Iterator kids = 
myComponent.getChildren().iterator();
while (kids.hasNext()) {
 UIComponent child = 
(UIComponent)kids.next();
 ...
}

hth
Alexander

  
  
  From: arti [mailto:[EMAIL PROTECTED] 
  Sent: Friday, April 21, 2006 12:25 PMTo: MyFaces 
  DiscussionSubject: getChildren().iterator() 
  problem
  
  Hi,
  
  I am facing a problem 
  withgetChildren().iterator(). (using getChildren().listIterator()works perfect) 
  Why?
  
  My custom table 
  component has just one child column element in it. 
  
  But still the 
  iterator obtained as mentioned above,enters the following loop twice and 
  second time throws NullPointerException
  
   Iterator kids = 
  myComponent.getChildren().iterator();
   
  if (kids.hasnext()) {
   
  do {
   
  UICompoment child = 
  kids.next(); 
  // this line throws NullPointerException when executed second time in 
  loop
   
  /* some code here */
   
  } while (kids.hasnext());
   }
  
  Thanks
  Arti

Re: getChildren().iterator() problem

2006-04-21 Thread Raj Saini 
Better approach is to use for loop.

for (Iterator kids = myComponent.getChildren().iterator(); kids.hasNext();) {
  UIComponent child = (UIComponent)kids.next();
  ...
}

On 4/21/06, Jesse Alexander (KSFD 121)
[EMAIL PROTECTED] wrote:

 I usually prefer the while-loop for this kind of operation:


 Iterator kids = myComponent.getChildren().iterator();

 while (kids.hasNext()) {
   UIComponent child = (UIComponent)kids.next();
   ...
 }

 hth
 Alexander


  
  From: arti [mailto:[EMAIL PROTECTED]
 Sent: Friday, April 21, 2006 12:25 PM
 To: MyFaces Discussion
 Subject: getChildren().iterator() problem



 Hi,

 I am facing a problem with getChildren().iterator(). (using
 getChildren().listIterator() works perfect)  Why?

 My custom table component has just one child column element in it.

 But still the iterator obtained as mentioned above, enters the following
 loop twice and second time throws NullPointerException

 Iterator kids = myComponent.getChildren().iterator();
 if (kids.hasnext()) {
 do {
 UICompoment child = kids.next();// this line throws
 NullPointerException when executed second time in loop
 /* some code here */
 } while (kids.hasnext());
 }

 Thanks
 Arti

RE: getChildren().iterator() problem

2006-04-21 Thread Frank Russo 
No offense guys, but the for and while loop approach is identical. I use
the for loop, but it gets compiled into the same jvm code. 

Looking at the original do/while code, it looks ok. I'd be surprised if
the for approach works, but it's probably worth a shot since it will
only take a couple of minutes to try...

Frank Russo
Senior Developer
FX Alliance, LLC


-Original Message-
From: Raj Saini [mailto:[EMAIL PROTECTED] 
Sent: Friday, April 21, 2006 8:03 AM
To: MyFaces Discussion
Subject: Re: getChildren().iterator() problem

Better approach is to use for loop.

for (Iterator kids = myComponent.getChildren().iterator();
kids.hasNext();) {
  UIComponent child = (UIComponent)kids.next();
  ...
}

On 4/21/06, Jesse Alexander (KSFD 121)
[EMAIL PROTECTED] wrote:

 I usually prefer the while-loop for this kind of operation:


 Iterator kids = myComponent.getChildren().iterator();

 while (kids.hasNext()) {
   UIComponent child = (UIComponent)kids.next();
   ...
 }

 hth
 Alexander


  
  From: arti [mailto:[EMAIL PROTECTED]
 Sent: Friday, April 21, 2006 12:25 PM
 To: MyFaces Discussion
 Subject: getChildren().iterator() problem



 Hi,

 I am facing a problem with getChildren().iterator(). (using
 getChildren().listIterator() works perfect)  Why?

 My custom table component has just one child column element in it.

 But still the iterator obtained as mentioned above, enters the 
 following loop twice and second time throws NullPointerException

 Iterator kids = myComponent.getChildren().iterator();
 if (kids.hasnext()) {
 do {
 UICompoment child = kids.next();// this line
throws
 NullPointerException when executed second time in loop
 /* some code here */
 } while (kids.hasnext());
 }

 Thanks
 Arti

RE: getChildren().iterator() problem

2006-04-21 Thread arti 
Hi 

It did not work with both solutions suggested. I removed if statement
and tried with both for loop and while loop as suggested, but iterator()
method does not work.

It still goes into the loop for second child and throws
NullPointerException.

Thanks 
Arti
-Original Message-
From: Raj Saini [mailto:[EMAIL PROTECTED] 
Sent: Friday, April 21, 2006 2:03 PM
To: MyFaces Discussion
Subject: Re: getChildren().iterator() problem

Better approach is to use for loop.

for (Iterator kids = myComponent.getChildren().iterator();
kids.hasNext();) {
  UIComponent child = (UIComponent)kids.next();
  ...
}

On 4/21/06, Jesse Alexander (KSFD 121)
[EMAIL PROTECTED] wrote:

 I usually prefer the while-loop for this kind of operation:


 Iterator kids = myComponent.getChildren().iterator();

 while (kids.hasNext()) {
   UIComponent child = (UIComponent)kids.next();
   ...
 }

 hth
 Alexander


  
  From: arti [mailto:[EMAIL PROTECTED]
 Sent: Friday, April 21, 2006 12:25 PM
 To: MyFaces Discussion
 Subject: getChildren().iterator() problem



 Hi,

 I am facing a problem with getChildren().iterator(). (using
 getChildren().listIterator() works perfect)  Why?

 My custom table component has just one child column element in it.

 But still the iterator obtained as mentioned above, enters the 
 following loop twice and second time throws NullPointerException

 Iterator kids = myComponent.getChildren().iterator();
 if (kids.hasnext()) {
 do {
 UICompoment child = kids.next();// this line
throws
 NullPointerException when executed second time in loop
 /* some code here */
 } while (kids.hasnext());
 }

 Thanks
 Arti