How to display value of List#size() in JSF EL?
I\'d like to know if there\'s a way to bind the returned value of a method into a JSF component. I\'ll explain myself better. Let\'s say I have a class like this:
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If you're running an EL 2.2 capable container (Tomcat 7, Glassfish 3, JBoss AS 6 or newer, all implementing Servlet 3.0), or are using JBoss EL, then you should be able to invoke non-getter methods by EL:
<h:outputText value="#{myManagedBean.currentDocument.attachment.size()}" />An alternative is to use JSTL
fn:length():<html xmlns:fn="http://java.sun.com/jsp/jstl/functions" ...> ... <h:outputText value="#{fn:length(myManagedBean.currentDocument.attachment)}" />If none of that is possible for you for some reason, then your best bet is to create an EL function yourself
<h:outputText value="#{my:size(myManagedBean.currentDocument.attachment)}" />or to add an extra getter method to
#{myManagedBean}which returns exactly that.<h:outputText value="#{myManagedBean.currentDocumentAttachmentSize}" />See also:
- Invoke direct methods or methods with arguments / variables / parameters in EL
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