Re: Indexed Properties and Lazy List behaviour

2004-10-02 Thread Hubert Rabago 
Cool.  I get it.  Wow.  Now that I get it, I really like it.  It's
like the dyna form bean finally caught up with the nested tags!

Thanks, Niall.

On Sat, 2 Oct 2004 00:50:14 +0100, Niall Pemberton
[EMAIL PROTECTED] wrote:
 OK I think I must be spreading confusion - thats what you get, arrays of
 beans, not strings.
 
 For LazyValidatorForm the default for an indexed property is an ArrayList of
 LazyDynaBean - and it populates the LazyDynaBean for you automatically.
 
 For LazyDynaBean the default indexed property is an ArrayList - but it
 doesn't populate it with anything. If however you create a custom
 LazyDynaBean (like the example I gave) changing the default indexed property
 to an LazyDynaBean array then the default indexed property is an Array of
 LazyDynaBean  - populated automatically. Now you can have 1...n levels of
 indexed beans to your hearts content.
 
 Niall
 
 - Original Message -
 From: Hubert Rabago [EMAIL PROTECTED]
 Subject: Re: Indexed Properties and Lazy List behaviour
 
  My understanding of the question on the user list was for a form which
  contained an array of beans, instead of just an array of strings.  An
  example would be a form bean containing a list/array of children, each
  with a name, date of birth, daily allowance, etc.  If each child is a
  dyna form, I can use FormDef for each element.


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RE: Indexed Properties and Lazy List behaviour

2004-10-01 Thread David Suarez 
Your other solutions are awesome.  I use the hand crank... one since I
didn't know of the lazylist at the time.  The code looks right.

Thanks for posting the other lazy solutions, I'll try them in the
future.

Regards...djsuarez

-Original Message-
From: Niall Pemberton [mailto:[EMAIL PROTECTED] 
Sent: Thursday, September 30, 2004 6:18 PM
To: Struts Users Mailing List
Subject: Indexed Properties and Lazy List behaviour

I've set up this wiki page showing how to use indexed properties and
implement lazy list behaviour in an ActionForm.

http://wiki.apache.org/struts/StrutsCatalogLazyList

There are three possible solutions to lazy list beviour on that page -
but
since I'm only using LazyDynaBeans myself, I would appreciate if anyone
using either the Commons Collections LazyList or hand cranked lazy lists
would take a look to see if what I posted looks right.

Niall






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Re: Indexed Properties and Lazy List behaviour

2004-10-01 Thread Hubert Rabago 
In 2.3 of StrutsCatalogLazyList, it uses a Lazy*Form flavor to hold an
indexed property.  Can the indexed property itself an array or list of
Lazy*Form objects?

form-bean name=skillForm 
type=org.apache.struts.validator.LazyValidatorForm
form-property name=skills
type=org.apache.struts.validator.LazyValidatorForm/
/form-bean


On Fri, 1 Oct 2004 00:17:40 +0100, Niall Pemberton
[EMAIL PROTECTED] wrote:
 I've set up this wiki page showing how to use indexed properties and
 implement lazy list behaviour in an ActionForm.
 
 http://wiki.apache.org/struts/StrutsCatalogLazyList
 
 There are three possible solutions to lazy list beviour on that page - but
 since I'm only using LazyDynaBeans myself, I would appreciate if anyone
 using either the Commons Collections LazyList or hand cranked lazy lists
 would take a look to see if what I posted looks right.
 
 Niall
 
 -
 To unsubscribe, e-mail: [EMAIL PROTECTED]
 For additional commands, e-mail: [EMAIL PROTECTED]
 


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Re: Indexed Properties and Lazy List behaviour

2004-10-01 Thread Niall Pemberton 
It could, although there is no need for it to be an ActionForm - could just
be a LazyDynaBean. Having said that, you would probably want to override the
default indexed type to be a LazyDynaBean array rather than ArrayList as
LazyDynaBean doesn't populate Lists, but it does Arrays.

public class CustomLazyBean extends LazyDynaBean {

public CustomLazyBean() {
 super();
}

   protected Object defaultIndexedProperty(String name) {
return new CustomLazyBean[0];
}

}


 form-bean name=skillForm
 type=org.apache.struts.validator.LazyValidatorForm
 form-property name=skills
 type=myPackage.CustomLazyBean[]/
 /form-bean


Niall

- Original Message - 
From: Hubert Rabago [EMAIL PROTECTED]
To: Struts Users Mailing List [EMAIL PROTECTED]
Sent: Friday, October 01, 2004 8:07 PM
Subject: Re: Indexed Properties and Lazy List behaviour


 In 2.3 of StrutsCatalogLazyList, it uses a Lazy*Form flavor to hold an
 indexed property.  Can the indexed property itself an array or list of
 Lazy*Form objects?

 form-bean name=skillForm
 type=org.apache.struts.validator.LazyValidatorForm
 form-property name=skills
 type=org.apache.struts.validator.LazyValidatorForm/
 /form-bean


 On Fri, 1 Oct 2004 00:17:40 +0100, Niall Pemberton
 [EMAIL PROTECTED] wrote:
  I've set up this wiki page showing how to use indexed properties and
  implement lazy list behaviour in an ActionForm.
 
  http://wiki.apache.org/struts/StrutsCatalogLazyList
 
  There are three possible solutions to lazy list beviour on that page -
but
  since I'm only using LazyDynaBeans myself, I would appreciate if anyone
  using either the Commons Collections LazyList or hand cranked lazy lists
  would take a look to see if what I posted looks right.
 
  Niall
 
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Re: Indexed Properties and Lazy List behaviour

2004-10-01 Thread Hubert Rabago 
But if I need it to be a DynaActionForm subclass, then I'd just use
LazyValidatorForm or its subclass, right?  In which case, wouldn't I
have to worry about it being properly initialized, as indicated in
http://struts.apache.org/userGuide/building_controller.html#dyna_action_form_classes
?

Someone asked about combining FormDef and LazyBeans to come up with a
form containing indexed properties.  FormDef works with
DynaActionForms.  If I have an array or list of dyna forms, I can use
FormDef with each element.  The problem is coming up with a lazy,
non-session-scope implementation.  I came up with the code snippet at
https://formdef.dev.java.net/servlets/ReadMsg?list=usersmsgNo=12
because I assumed that in order to create a proper ActionForm, it
needed to go through FormBeanConfig's createActionForm.  Are lazy dyna
forms exempt from this requirement?


On Fri, 1 Oct 2004 21:14:25 +0100, Niall Pemberton
[EMAIL PROTECTED] wrote:
 It could, although there is no need for it to be an ActionForm - could just
 be a LazyDynaBean. Having said that, you would probably want to override the
 default indexed type to be a LazyDynaBean array rather than ArrayList as
 LazyDynaBean doesn't populate Lists, but it does Arrays.
 
 public class CustomLazyBean extends LazyDynaBean {
 
public CustomLazyBean() {
 super();
}
 
   protected Object defaultIndexedProperty(String name) {
return new CustomLazyBean[0];
}
 
 }
 
 form-bean name=skillForm
 type=org.apache.struts.validator.LazyValidatorForm
 form-property name=skills
 type=myPackage.CustomLazyBean[]/
 /form-bean
 
 
 Niall
 
 
 
 - Original Message -
 From: Hubert Rabago [EMAIL PROTECTED]
 To: Struts Users Mailing List [EMAIL PROTECTED]
 Sent: Friday, October 01, 2004 8:07 PM
 Subject: Re: Indexed Properties and Lazy List behaviour
 
  In 2.3 of StrutsCatalogLazyList, it uses a Lazy*Form flavor to hold an
  indexed property.  Can the indexed property itself an array or list of
  Lazy*Form objects?
 
  form-bean name=skillForm
  type=org.apache.struts.validator.LazyValidatorForm
  form-property name=skills
  type=org.apache.struts.validator.LazyValidatorForm/
  /form-bean
 
 
  On Fri, 1 Oct 2004 00:17:40 +0100, Niall Pemberton
  [EMAIL PROTECTED] wrote:
   I've set up this wiki page showing how to use indexed properties and
   implement lazy list behaviour in an ActionForm.
  
   http://wiki.apache.org/struts/StrutsCatalogLazyList
  
   There are three possible solutions to lazy list beviour on that page -
 but
   since I'm only using LazyDynaBeans myself, I would appreciate if anyone
   using either the Commons Collections LazyList or hand cranked lazy lists
   would take a look to see if what I posted looks right.
  
   Niall
  
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   For additional commands, e-mail: [EMAIL PROTECTED]
  
  
 
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Re: Indexed Properties and Lazy List behaviour

2004-10-01 Thread Niall Pemberton 
I believe I understand the principle of FormDef - you're combining the form
definition with the validation rules. So is that why you want to nest
indexed ActionForms rather than any old type of DynaBean? Are you then
calling the validate() method on each of the indexed ActionForms?

You're right if you want a properly initialized lazy ActionForm then you
need to go through the FormBeanConfig's createActionForm method. Having said
that the default indexed property type of LazyDynaBean/LazyValdatorForm is
an ArrayList - changing that to a LazyDynaBean[] as I showed in the
CustomLazyBean means there is no need to then initialize that indexed
property - its done automatically for arrays (CustomLazyBean would
instantiate a new DynaBean and grows it accordingly).

From reading the message on the FormDef user list, then just having a
property which is a CustomLazyBean (rather than CustomLazyBean array) sounds
like it would work for your user - then only thing then is I don't really
understand how that then interacts with FormDef - hence my questions at the
top.

Sorry, should have got round to giving FormDef a go - but lifes busy :-(

Niall

- Original Message - 
From: Hubert Rabago [EMAIL PROTECTED]
To: Struts Users Mailing List [EMAIL PROTECTED]
Sent: Friday, October 01, 2004 9:43 PM
Subject: Re: Indexed Properties and Lazy List behaviour


 But if I need it to be a DynaActionForm subclass, then I'd just use
 LazyValidatorForm or its subclass, right?  In which case, wouldn't I
 have to worry about it being properly initialized, as indicated in

http://struts.apache.org/userGuide/building_controller.html#dyna_action_form_classes
 ?

 Someone asked about combining FormDef and LazyBeans to come up with a
 form containing indexed properties.  FormDef works with
 DynaActionForms.  If I have an array or list of dyna forms, I can use
 FormDef with each element.  The problem is coming up with a lazy,
 non-session-scope implementation.  I came up with the code snippet at
 https://formdef.dev.java.net/servlets/ReadMsg?list=usersmsgNo=12
 because I assumed that in order to create a proper ActionForm, it
 needed to go through FormBeanConfig's createActionForm.  Are lazy dyna
 forms exempt from this requirement?


 On Fri, 1 Oct 2004 21:14:25 +0100, Niall Pemberton
 [EMAIL PROTECTED] wrote:
  It could, although there is no need for it to be an ActionForm - could
just
  be a LazyDynaBean. Having said that, you would probably want to override
the
  default indexed type to be a LazyDynaBean array rather than ArrayList
as
  LazyDynaBean doesn't populate Lists, but it does Arrays.
 
  public class CustomLazyBean extends LazyDynaBean {
 
 public CustomLazyBean() {
  super();
 }
 
protected Object defaultIndexedProperty(String name) {
 return new CustomLazyBean[0];
 }
 
  }
 
  form-bean name=skillForm
  type=org.apache.struts.validator.LazyValidatorForm
  form-property name=skills
  type=myPackage.CustomLazyBean[]/
  /form-bean
 
 
  Niall
 
 
 
  - Original Message -
  From: Hubert Rabago [EMAIL PROTECTED]
  To: Struts Users Mailing List [EMAIL PROTECTED]
  Sent: Friday, October 01, 2004 8:07 PM
  Subject: Re: Indexed Properties and Lazy List behaviour
 
   In 2.3 of StrutsCatalogLazyList, it uses a Lazy*Form flavor to hold an
   indexed property.  Can the indexed property itself an array or list of
   Lazy*Form objects?
  
   form-bean name=skillForm
   type=org.apache.struts.validator.LazyValidatorForm
   form-property name=skills
   type=org.apache.struts.validator.LazyValidatorForm/
   /form-bean
  
  
   On Fri, 1 Oct 2004 00:17:40 +0100, Niall Pemberton
   [EMAIL PROTECTED] wrote:
I've set up this wiki page showing how to use indexed properties and
implement lazy list behaviour in an ActionForm.
   
http://wiki.apache.org/struts/StrutsCatalogLazyList
   
There are three possible solutions to lazy list beviour on that
page -
  but
since I'm only using LazyDynaBeans myself, I would appreciate if
anyone
using either the Commons Collections LazyList or hand cranked lazy
lists
would take a look to see if what I posted looks right.
   
Niall
   
  
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Re: Indexed Properties and Lazy List behaviour

2004-10-01 Thread Hubert Rabago 
Aside from form field definition, which isn't needed for a lazy form
bean, having a FormDef-backed form would take care of the
formatting/parsing of the data, even i18n.  The form definition 
validation config combo is actually just optional.

My understanding of the question on the user list was for a form which
contained an array of beans, instead of just an array of strings.  An
example would be a form bean containing a list/array of children, each
with a name, date of birth, daily allowance, etc.  If each child is a
dyna form, I can use FormDef for each element.

On Fri, 1 Oct 2004 22:35:15 +0100, Niall Pemberton
[EMAIL PROTECTED] wrote:
 I believe I understand the principle of FormDef - you're combining the form
 definition with the validation rules. So is that why you want to nest
 indexed ActionForms rather than any old type of DynaBean? Are you then
 calling the validate() method on each of the indexed ActionForms?
 
 You're right if you want a properly initialized lazy ActionForm then you
 need to go through the FormBeanConfig's createActionForm method. Having said
 that the default indexed property type of LazyDynaBean/LazyValdatorForm is
 an ArrayList - changing that to a LazyDynaBean[] as I showed in the
 CustomLazyBean means there is no need to then initialize that indexed
 property - its done automatically for arrays (CustomLazyBean would
 instantiate a new DynaBean and grows it accordingly).
 
 From reading the message on the FormDef user list, then just having a
 property which is a CustomLazyBean (rather than CustomLazyBean array) sounds
 like it would work for your user - then only thing then is I don't really
 understand how that then interacts with FormDef - hence my questions at the
 top.
 
 Sorry, should have got round to giving FormDef a go - but lifes busy :-(
 
 Niall
 
 
 
 - Original Message -
 From: Hubert Rabago [EMAIL PROTECTED]
 To: Struts Users Mailing List [EMAIL PROTECTED]
 Sent: Friday, October 01, 2004 9:43 PM
 Subject: Re: Indexed Properties and Lazy List behaviour
 
  But if I need it to be a DynaActionForm subclass, then I'd just use
  LazyValidatorForm or its subclass, right?  In which case, wouldn't I
  have to worry about it being properly initialized, as indicated in
 
 http://struts.apache.org/userGuide/building_controller.html#dyna_action_form_classes
  ?
 
  Someone asked about combining FormDef and LazyBeans to come up with a
  form containing indexed properties.  FormDef works with
  DynaActionForms.  If I have an array or list of dyna forms, I can use
  FormDef with each element.  The problem is coming up with a lazy,
  non-session-scope implementation.  I came up with the code snippet at
  https://formdef.dev.java.net/servlets/ReadMsg?list=usersmsgNo=12
  because I assumed that in order to create a proper ActionForm, it
  needed to go through FormBeanConfig's createActionForm.  Are lazy dyna
  forms exempt from this requirement?
 
 
  On Fri, 1 Oct 2004 21:14:25 +0100, Niall Pemberton
  [EMAIL PROTECTED] wrote:
   It could, although there is no need for it to be an ActionForm - could
 just
   be a LazyDynaBean. Having said that, you would probably want to override
 the
   default indexed type to be a LazyDynaBean array rather than ArrayList
 as
   LazyDynaBean doesn't populate Lists, but it does Arrays.
  
   public class CustomLazyBean extends LazyDynaBean {
  
  public CustomLazyBean() {
   super();
  }
  
 protected Object defaultIndexedProperty(String name) {
  return new CustomLazyBean[0];
  }
  
   }
  
   form-bean name=skillForm
   type=org.apache.struts.validator.LazyValidatorForm
   form-property name=skills
   type=myPackage.CustomLazyBean[]/
   /form-bean
  
  
   Niall
  
  
  
   - Original Message -
   From: Hubert Rabago [EMAIL PROTECTED]
   To: Struts Users Mailing List [EMAIL PROTECTED]
   Sent: Friday, October 01, 2004 8:07 PM
   Subject: Re: Indexed Properties and Lazy List behaviour
  
In 2.3 of StrutsCatalogLazyList, it uses a Lazy*Form flavor to hold an
indexed property.  Can the indexed property itself an array or list of
Lazy*Form objects?
   
form-bean name=skillForm
type=org.apache.struts.validator.LazyValidatorForm
form-property name=skills
type=org.apache.struts.validator.LazyValidatorForm/
/form-bean
   

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Re: Indexed Properties and Lazy List behaviour

2004-10-01 Thread Niall Pemberton 
OK I think I must be spreading confusion - thats what you get, arrays of
beans, not strings.

For LazyValidatorForm the default for an indexed property is an ArrayList of
LazyDynaBean - and it populates the LazyDynaBean for you automatically.

For LazyDynaBean the default indexed property is an ArrayList - but it
doesn't populate it with anything. If however you create a custom
LazyDynaBean (like the example I gave) changing the default indexed property
to an LazyDynaBean array then the default indexed property is an Array of
LazyDynaBean  - populated automatically. Now you can have 1...n levels of
indexed beans to your hearts content.

Niall

- Original Message - 
From: Hubert Rabago [EMAIL PROTECTED]
Subject: Re: Indexed Properties and Lazy List behaviour

 My understanding of the question on the user list was for a form which
 contained an array of beans, instead of just an array of strings.  An
 example would be a form bean containing a list/array of children, each
 with a name, date of birth, daily allowance, etc.  If each child is a
 dyna form, I can use FormDef for each element.



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