For JSTL + EL experts

[Dan Nun]

In the example:

    
(This Work)True or false :${!empty myobject.myMap["key1"]["key2"]}<br>
(This doesn't Work)Value:${myobject.myMap["key1"]["key2"].value}
<c:if test="${!empty myobject.myMap["key1"]}"  >
<h2>Testing 123!</h2>
</c:if>

I have an object that has a map ( myMap ), where myMap holds another map(acessed a entry with "key2"). I can get the value using common EL outside JSTL tags, but when I try to use <c:if test="...it fails saying:

/usr/userMainPage.jsp(37,63) equal symbol expected
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:88)
at org.apache.jasper.compiler.Parser.parseAttribute(Parser.java:194)
at org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:144)
at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1339)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1578)
at org.apache.jasper.compiler.Parser.parseBody(Parser.java:1807)
at org.apache.jasper.compiler.Parser.parseOptionalBody(Parser.java:1070)
at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1378)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1578)
at org.apache.jasper.compiler.Parser.parse(Parser.java:127)
at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:212)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:156)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:296)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:299)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.pix.filters.HibernateTransactionFilter.doFilter(HibernateTransactionFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:595)
    

What could this be? When I use<c:if test="${!empty myobject.myMap}"> it works....damN!
[ June 16, 2008: Message edited by: Bear Bibeault ]

[Bear Bibeault]

What's in column 63 of the failing line?

[Dan Nun]

I don't know. When I compile in the IDE I can't see the source code generated by the JSP. There's no way for me to know this, sorry...

But....I've manage to make it work. I switched all the (") characters in the <c:if tag using map objects to (') characters. Now it's all working. I didn't even know that we could use this character =)

But thank's anyway...

[Bear Bibeault]

test="${!empty myobject.myMap["key1"]}"

If you use the quote character to delimit the attribute, then yeah, you need to use ' inside or the parser thinks that your quote is being closed.