Is there an alternative to c:choose in JSF when using f:validator

I understand I cannot use <c:choose> within a component in a jsf page. I am trying to see if there is an alternative. I looked at the Tomahawk and that isn't what I really need. I am trying to validate negative and positive numbers in a column. I want to be able to choose between the 2 validator tags that I have created. I tried using the rendered attribute but it still doesn't work. Below is kind of what I am looking for but it is not working like I want it to. Does anyone have any suggestions??

Thanks in advance.

 <c:choose>
        <c:when test="#{entry.dataEntry.posValue}">
           <f:validator validatorId="hits.positiveNumberValidator"/>
        </c:when>
        <c:otherwise test="#{entry.dataEntry.开发者_如何学JAVAnegValue}">
           <f:validator validatorId="hits.negativeNumberValidator"/>
        </c:otherwise>
    </c:choose>

---

Wrap in another validator and add them as attributes.

<f:validator validatorId="hits.numberValidator"/>
<f:attribute name="posValue" value="#{entry.dataEntry.posValue}" />
<f:attribute name="negValue" value="#{entry.dataEntry.negValue}" />

And then in the NumberValidator:

Boolean negValue = component.getAttributes().get("negValue");

if (posValue != null && posValue) {
    new PositiveNumberValidator().validate(context, component, value);
}

Boolean posValue = component.getAttributes().get("posValue");

if (negValue != null && negValue) {
    new NegativeNumberValidator().validate(context, component, value);
}

Note that this doesn't work when #{entry} is actually an iterated item like as declared in var attribute of h:dataTable or ui:repeat, because the f:attribute is tied to the JSF component, not to its output. Since the variable name #{entry} hints less or more that this is actually the case, here's how you could do it.

Wrap the collection in a DataModel:

private DataModel entries;

public Bean() {
    entries = new ListDataModel(someDAO.list());
}

// ...

Use it in h:dataTable or ui:repeat as follows:

<h:dataTable value="#{bean.entries}" var="entry">
    <h:column>
        <h:inputText validator="#{bean.numberValidator}" />
    </h:column>
</h:dataTable>

And implement the validator in the Bean as follows:

public void numberValidator(FacesContext context, UIComponent component, Object value) throws ValidatorException) {
    Entry entry = (Entry) entries.getRowData();

    if (entry.isPosValue()) {
        new PositiveNumberValidator().validate(context, component, value);
    }

    if (entry.isNegValue()) {
        new NegativeNumberValidator().validate(context, component, value);
    }
}

(you may want to make those validators an instance variable of the bean instead (only if they are threadsafe))