Question

I’m making a simple form with an input field implementing Bean Validation. All of the validations work fine. The issue is the message rendered (or lack of rendering) when the user enters a non numeric value:

• If I use the @Pattern check in the Bean, no warning message is displayed in the view when the user enters a non numeric value.

• If I remove the @Pattern from the Bean, the following warning message shows up when the user enters a non numberic value:

  “j_idt8:age: ‘some string’ debe ser un número entre -2147483648 y 2147483647. Ejemplo: 9346”

  which is translated to: “j_idt8:age: ‘some string’ must be a number between -2147483648 and 2147483647. Example: 9346”.

Is there anything I’m missing? Is there any way to implement a simple message warning? or is there anyway to customize the default message of: “j_idt8:age: ‘some string’ debe ser un número entre -2147483648 y 2147483647. Ejemplo: 9346”?

These are some code excerpt, in case you ask for them:

web.xml

<context-param>
    <description>JSF will interpret empty strings submitted values as null</description>
    <param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
    <param-value>true</param-value>
</context-param>

user Bean:

@NotNull(message = "Please enter your age")
@Pattern(regexp = "[0-9][0-9]", message = "Age must be numeric")
@Max(99)
@Min(18)
private Integer age;

Facelets:

<h:form>
    Enter your age:<br/>
    <h:inputText id="age" value="#{user.age}">
        <f:ajax event="blur" render="ageMessage" />
    </h:inputText>
    <h:message id="ageMessage" for="age" /><br/>

    <h:commandButton value="Insert" action="#{user.showChoice}">
        <f:ajax execute="@form" render="@form" />
    </h:commandButton>
</h:form>

Answer 1

You’re facing a conversion error, not a validation error. The problem manifests long before the validation can ever take place. It’s the builtin JSF String–Integer conversion which failed. Note that the @Pattern makes no sense on an Integer property. You cannot set it with an arbitrary String value.

If you change the property to be a String, then you’ll see the “expected” results. But keeping it Integer is of course better if it should really represent a number. You can finetune the JSF converter message by the converterMessage attribute, or by supplying a custom Converter implementation, or by overriding the default message bundle file in <message-bundle>.