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http://issues.apache.org/bugzilla/show_bug.cgi?id=32347 Summary: bean.propertyName does not evaluate correctly if the bean implements java.util.List Product: Commons Version: 1.0 Final Platform: PC OS/Version: Windows 2000 Status: NEW Severity: normal Priority: P2 Component: EL AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] I was using EL in a choose tag and could not get it to work at all on a particular page. It worked on other pages, but on one particular page I kept getting errors no matter what I tried. I would get errors like the following: "${VistaTreeModelProxy.empty == false}" contains invalid expression(s): javax.servlet.jsp.el.ELException: Encountered "empty", expected one of [<IDENTIFIER>] at org.apache.jasper.compiler.DefaultErrorHandler.jspError (DefaultErrorHandler.java:39) at org.apache.jasper.compiler.ErrorDispatcher.dispatch (ErrorDispatcher.java:409) After trying many different syntaxes, I got a trace of: 2004-11-22 09:28:16 ApplicationDispatcher[/JSF] Servlet.service() for servlet jsp threw exception javax.servlet.jsp.el.ELException: 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. at org.apache.commons.el.Logger.logError(Logger.java:481) at org.apache.commons.el.Logger.logError(Logger.java:498) at org.apache.commons.el.Logger.logError(Logger.java:566) at org.apache.commons.el.ArraySuffix.evaluate(ArraySuffix.java:227) at org.apache.commons.el.ComplexValue.evaluate(ComplexValue.java:145) I downloaded the source and followed the stack-trace. It looks as though the fact that my bean implemented java.util.List was causing the problem. (This is the only difference I could really find from my identical use of the "choose" tag in other pages.) >From what I have read, the dot-syntax should always try for a bean property, but this doesn't seem to work in the case of a List. Also, using the ["property"] syntax will also always try to coerce "property" into an integer. I am not sure if this is correct either, although what I have read is a bit ambiguous. To work-around this, just don't use EL when it gets confused. The syntax below works: <c:when test="<%= VistaTreeModelProxy.isEmpty() == false %>"> -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
