1 Reply Latest reply on May 23, 2016 4:19 PM by amostech

transfer a value from javascript to a backingbean java

voicul Apr 30, 2014 3:02 AM

Hello guys,

I have a js code that finds out the timezone and then I am trying to "send" a value to a java backingbean.

This code must be execute during the load of the xhtml page because in the process I use the "localTimeZone" bean.

	<h:inputHidden value="#{localTimeZone.timeZoneID}" id="clientSelectedTimeZoneID"/>
	<h:inputHidden value="#{localTimeZone.offset}" id="clientSelectedOffset"/>

	<script type="text/javascript">
		var userTimeZone = userTimeZone();

		var hiddenElementTimeZoneID = document.getElementById("requestWizardForm:clientSelectedTimeZoneID");
		hiddenElementTimeZoneID.value = userTimeZone.timeZoneID;

		var hiddenElementOffset = document.getElementById("requestWizardForm:clientSelectedOffset");
		hiddenElementOffset.value = userTimeZone.offset;
	</script>

Can you please tell me how is the correct way to do this in order to have the setters of backingbean called ?

Thanks

PS:

JSF ver: Implementation-Version: 1.2_12-b01-FCS
RICHFACES: Implementation-Version: 3.3.3.Final

1. Re: transfer a value from javascript to a backingbean java

amostech May 23, 2016 4:19 PM (in response to voicul)
I have no specific information regarding richfaces itself but I am guessing this should be similar regardless of which template library you use.

For example in primefaces you would have a component called <p:remoteCommand which allowed you to bind a javascript function to a backing bean method.

Anyway.

Let's say you are doing this in a non-ajax manner. Meaning that your parameters are going to be sent through a POST or GET request to your backing bean.

Then I would just create a button in the screen:
<h:commandButton id="hdnBtn" actionListener="#{personBean.method}" style="display: none;" />
Note the display: none; css. So when your page loads you change the value of this field and trigger it's click manually. Like this:

onclick="jQuery('#form:hdnBtn').click();"

If you don't like this approach, please refer to this stackoverflow entry where you will find other suggestions.
Hope this helps.

Best,
Arthur.
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