Conditionally render element's attribute in a composite component

Question

I have the following composite component:

Answer 1

You can use JSTL <c:if> to build the view conditionally and <f:attribute> to specify an attribute separately:

<h:inputText ...>
    <c:if test="#{not empty cc.attrs.size}">
        <f:attribute name="size" value="#{cc.attrs.size}" />
    </c:if>
</h:inputText>

An alternative is to specify a default for the composite component attribute:

<cc:attribute name="size" required="false" default="10" />

Answer 2

I believe there is an alternate method for accessing attributes. I've used this with JSF 2 when accessing an attribute named with a java reserved keyword.

{cc.attrs['size']}

Answer 3

Additional to BalusC's post:

You must use

type="int" in the cc:attribute-tag :

cc:attribute name="maxlength" type="int"