properties are to maintain internal component state, while parameters
are the tying the component to its container.
properties are (in the simple case) a "shortcut" for implementing real
Pojo properties for your page/component - but they offer some extras,
like persistance -
parameters update automatically and you can not set them - if you do
call "setXXX" on a parameter, it will either end up in an exception, or
will update some object outside your component, but it will *not* "just"
change the parameter.
say you have an InsertText component inside a loop -
you bind the value parameter to some property of the container, and the
text that will be rendered on each iteration will be different -
depending on the "value" parameter -
Hope that helps,
Ron
Alex Kartashev wrote:
Hi guys,
I am a new Tapestry 4 user. I've been researching Tapestry 4 for about a
week now, even developed some toy apps. I am already sold on the value
proposition.
One thing I am a bit confused about is Component parameters and properties.
1. Is there any difference between a component parameter and property?
Or are these words used interchangeably?
2. Whereas lifecycle of page properties is very clear: pages are pooled
and their properties are cleared out upon returning to the pool,
components are not pooled independently but along with their pages. So,
what about they properties/parameters? Will they be cleared out
automatically as well?
Thank a lot in advance,
Alex
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