Question

JSF custom composite components
input.xhtml

<cc:interface>
    <cc:attribute name="validator"/>
</cc:interface>

<cc:implementation>
    <h:inputText validator="#{cc.attrs.validator}"/>
</cc:implementation>

*.xhtml

<l:input value = ... validator="#{testValidator.validator}"/>

java code

@ManagedBean

public class TestValidator {

    public void validator(FacesContext context, UIComponent component, Object value) throws ValidatorException {
         System.out.println("Call validator");
    }
}

PropertyNotFoundException:

validator="#{testValidator.validator}": The class 'TestValidator' does not have the property 'validator'.

How to solve this problem?
my final way:

Answer 1

This is indeed not going to work. In order to attach a validator to an input component specified by the composite, you need to register the input component as a <cc:editableValueHolder> in the <cc:interface> first.

<cc:interface>
    <cc:editableValueHolder name="yourInputName" targets="yourInputId" />
</cc:interface>
<cc:implementation>
    <h:inputText id="yourInputId" ... />
</cc:implementation>

This way, any <f:validator for="yourInputName"> nested in the composite component declaration will be applied to the desired input component.

<l:input>
    <f:validator validatorId="myValidator" for="yourInputName" />
</l:input>

You’ll only need to replace the tight coupled validator method by a real standalone Validator implementation.

@FacesValidator("myValidator")
public class MyValidator implements Validator {
    // ...
}

Note: the standard JSF validators like <f:validateLength>, <f:validateRequired>, etc have all also a for attribute for this purpose.