ToolTips for error on validation

[vineet]

<h:panelGrid id="details" columns="2" columnClasses="formColumn1,formColumn2">
<pe:requiredLabel for="firstName" value="First Name: "/>
<p:inputText id="firstName" required="true" title="#{component.valid ? '' : 'First Name can not be empty'}"/>
<pe:requiredLabel for="lastName" value="Last Name: "/>
<p:inputText id="lastName" required="true" title="#{component.valid ? '' : 'Last Name can not be empty'}"/>
</h:panelGrid>

<p:commandButton value="Submit" process="details" update="details" style="margin-top: 10px;"/>

<pe:tooltip global="true" position="left center" targetPosition="right center" forSelector=".ui-state-error"/>

In this case if i need to handle error other validations like minimum length , datatype of field then how can i handle it ?

[Oleg]

With attached validators

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<p:inputText id="lastName" required="true" title="#{component.valid ? '' : myBean.errorMessage}">
    <f:validateABC ..../>
    <f:validateXYZ ..../>
</p:inputText>

myBean.errorMessage should return last added (by any validator(s)) error message(s) which you can get in your bean as

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Iterator<FacesMessage> msgs = facesContext.getMessages("lastName");

Look in PF's MessageRenderer.java for more information.

[vineet]

Does it mean we will have to write custom validator for each validation which will call bean to validate errors like minimum length , required etc ?

[Oleg]

No. You can use quite normally validators. In case of validation error, component set to invalid and the message is added to FacesContext as FacesMessage. You should try to get the added message in the bean.

[vineet]

But if i have a validation like required = "true" in such case bean is not being called then how do we add message from the bean ?

[Oleg]

The bean is called when you update (render) input fields. If validation failed, the rendering phase is called. Input fields will be re-rendered in any case. As I said you can access messages in FacesContext from your bean. Maybe sogar in facelets direct (not tried)

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title="#{component.valid ? '' : facesContext.getMessages('lastName').next().getDetail()}"

Look into MessageRenderer.java as I said. You can copy code from there. Where is the problem?

[Oleg]

I tried it special for you. It works. Here is the code:

XHTML

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<p:inputText id="lastName" required="true" label="Last Name" title="#{component.valid ? '' : myController.messageForLastName}"/>

Java (controller bean)

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public String getMessageForLastName() {
    return FacesContext.getCurrentInstance().getMessages("lastName").next().getDetail();
}

The same is for all fields and validators. You can also customize default message text in JSF validators. Standard JSF validators store messages under well-defined keys. Refer JSF docu please how to do this.

[vineet]

Thanks a lot ..Greatly appreciated

[Oleg]

More generic and better if you use EL 2.x

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<p:inputText id="lastName" required="true" label="Last Name" title="#{component.valid ? '' : myController.getErrorMessage(component.clientId)}"/>

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public String getErrorMessage(final String clientId) {
    Iterator<FacesMessage> iter = FacesContext.getCurrentInstance().getMessages(clientId);
    if (iter.hasNext()) {
        return iter.next().getDetail(); // or getSummary()
    }

    return "";
}

I added this tip to my blog post http://ovaraksin.blogspot.de/2012/03/sh ... -with.html