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Date: Thu, 1 Sep 2005 18:05:05 +0300
From: Alexandr Kundirenko <akundirenko@gmail.com>
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To: "Tapestry users" <tapestry-user@jakarta.apache.org>, akundirenko@gmail.com
Subject: Beta-5. Page loading logic changed? More details
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It seems that initial-value is assigned is piece of generated code...
Because:

<property name="itemClass" initial-value="literal:research.model.SomeObject"/>

=== PageLoader.constructComponent(...) ===
...
            //NOT initialized at this point
            container.finishLoad(cycle, this, containerSpec);

            //INITIALIZED!!!
            container.enterActiveState();
...
==========================================

But in our overidden methods:

class FormPage extend PasePage {

        @Override
        public void enterActiveState() {
            //INITIALIZED
            super.enterActiveState();
        }

        @Override
        protected void finishLoad() {
            super.finishLoad();
            //NOT INITIALIZED EVEN AFTER SUPER CALL, WHY???
        }        

{

Or did I miss something?

AK> Hello All,

AK> I have persistent property which I want to initialize using
AK> another property value.

AK> Page spec:

AK>         <property name="itemClass"
AK> initial-value="literal:research.model.SomeObject"/>

AK> Page class:

AK>         /**
AK>          * Item which is initialized using value of #getItemClass
AK>          */
AK>          @Persist
AK>          public abstract IPersistable getItem();
AK>          public abstract void setItem(IPersistable item);

AK> In beta-4 I tried to do it in finishLoad:

AK>         /**
AK>          * @see org.apache.tapestry.AbstractComponent#finishLoad()
AK>          */
AK>          @Override
AK>          protected void finishLoad() {
AK>             super.finishLoad();
AK>             //itemClass is NOT initialized at this point!
AK>             setItem(getNewFormItemInstance());
AK>          }

AK> But for some reason after super.finishLoad() call "itemClass" property
AK> still WAS NOT initialized with intial-value. (Is it OK?)
AK> I examined sources and found another place for it, which worked:

AK>         /**
AK>          * @see
AK> org.apache.tapestry.AbstractComponent#enterActiveState()
AK>          */
AK>         @Override
AK>         public void enterActiveState() {                
AK>             super.enterActiveState();
AK>             //worked in beta-4
AK>             setItem(getNewFormItemInstance());
AK>         }

AK> But in beta-5 changes to propeties which are made in
AK> enterActiveState() are reset in some magic way... I'm trying to find
AK> where for a few hours. I set item in enterActiveState() and it is back
AK> to NULL in pageBeginRender(). Is it normal behaviour?

AK> Thank you,
AK>   aku


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