OmniFaces Showcase

cdicomponentscontextsconverterseleventlistenersexceptionhandlersfacesviewsfiltersfunctionsmanagedbeanspushresourcehandlerssearchservletstaghandlersutilsvalidatorsviewhandlers

 

• cdi
• components
• contexts
• converters
• el
• eventlisteners
• exceptionhandlers
• facesviews
• filters
• functions
• managedbeans
• push
• resourcehandlers
• search
• servlets
• taghandlers
• utils
• validators
• viewhandlers

 - 

converterenableRestorableViewignoreValidationFailedimportConstantsimportFunctionsmassAttributemethodParamskipValidatorstagAttributevalidatorviewParamValidationFailed

 

• converter
• enableRestorableView
• ignoreValidationFailed
• importConstants
• importFunctions
• massAttribute
• methodParam
• skipValidators
• tagAttribute
• validator
• viewParamValidationFailed

<o:converter converterId="javax.faces.DateTime" pattern="#{item.pattern}" locale="#{item.locale}" />

Demo

In the below demo, it was the intent to use <f:convertDateTime> as follows:

 <f:convertDateTime type="both" dateStyle="full" timeStyle="full" locale="#{locale}" />

But this wouldn't even run, it will throw the following exception because the #{locale} isn't available during view build time (for a background explanation, check this Stack Overflow answer).

 javax.faces.view.facelets.TagAttributeException: /taghandlers/converter @62,92 
 locale="" Attribute did not evaluate to a String or Locale: null
     at com.sun.faces.facelets.tag.jsf.ComponentSupport.getLocale(ComponentSupport.java:297)
     at com.sun.faces.facelets.tag.jsf.core.ConvertDateTimeHandler.setAttributes(ConvertDateTimeHandler.java:127)
     at com.sun.faces.facelets.tag.jsf.ConverterTagHandlerDelegateImpl.applyAttachedObject(ConverterTagHandlerDelegateImpl.java:130)
		

It works as intuitively expected with the <o:converter> as it allows a render time evaluation of attributes.

For another related use case, checkout the <o:validator> showcase page.

<h:dataTable value="#{converterBean.locales}" var="locale">
    <h:column>
        <f:facet name="header">Language</f:facet>
        #{locale.displayLanguage}
    </h:column>
    <h:column>
        <f:facet name="header">Full date time pattern</f:facet>
        <h:outputText value="#{now}">
            <o:converter converterId="javax.faces.DateTime" type="both" dateStyle="full" timeStyle="full" locale="#{locale}" />
        </h:outputText>
    </h:column>
</h:dataTable>

package org.omnifaces.showcase.taghandlers;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import javax.annotation.PostConstruct;
import javax.enterprise.context.RequestScoped;
import javax.inject.Named;

@Named
@RequestScoped
public class ConverterBean {

    private List<Locale> locales;

    @PostConstruct
    public void init() {
        locales = new ArrayList<>();

        for (String language : new String[] { "en", "es", "fr", "de", "nl", "ar", "he", "zh" }) {
            locales.add(new Locale(language));
        }
    }

    public List<Locale> getLocales() {
        return locales;
    }

}