This has been discussed numerous times on this list. The EL can reference javabean properties, and elements of collections and maps. That's it. The length of a collection is not a javabean property.
It's straightforward to implement a simple class called "CollectionBean" (and "MapBean") that is constructed with a collection (or map), which has two javabean properties, being "collection" and "size". You would do this setup outside of your JSP page, in your "prepare" servlets or actions. > -----Original Message----- > From: Sgarlata Matt [mailto:[EMAIL PROTECTED] > > Does anyone know how to get the length of a collection using the EL? I am > trying to do one of the tests below. Note that "children" is a List. > > <c:if test="${component.parentDao.children.length > 1}"> > <!-- stuff here --> > </c:if> > > or > > <c:if test="${component.parentDao.children.size > 1}"> > <!-- stuff here --> > </c:if> > > And get this error: > > javax.servlet.jsp.JspException: An error occurred while evaluating custom > action attribute "test" with value "${component.parentDao.children.length > > 1}": The "." operator was supplied with an index value of type > "java.lang.String" to be applied to a List or array, but that value cannot > be converted to an integer. > > Thanks! > > Matt --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
