[jboss-user] [JBoss Seam] - where's detailed JBoss EL documentation?

[ellenzhao]

I'd like to express a rendering condition using something like this:

rendered= "#{fooController.foo.crudStatus >= 'a'}"

where 'a' is a character in database. The semantics of 'a', 'b', ... is defined in an enum. For example 'a' means "creating", 'b' means "created" etc. 

However I got error message like this:

  | java.lang.NumberFormatException: For input string: "a"
  |         at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
  |         at java.lang.Long.parseLong(Long.java:403)
  |         at java.lang.Long.valueOf(Long.java:518)
  |         at org.jboss.el.lang.ELSupport.coerceToNumber(ELSupport.java:278)
  |         at org.jboss.el.lang.ELSupport.coerceToNumber(ELSupport.java:259)
  |         at org.jboss.el.lang.ELSupport.compare(ELSupport.java:85)
  |         at org.jboss.el.parser.AstGreaterThanEqual.getValue(AstGreaterThanEqual.java:29)
  |         at org.jboss.el.parser.AstAnd.getValue(AstAnd.java:26)
  |         at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
  |         at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
  |         at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:370)
  |         at javax.faces.component.UIComponent.encodeAll(UIComponent.java:880)
  |         at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
  |         at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:571)
  |         at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
  |         at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:233)
  |         at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
  |         at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  |         at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
  |         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:82)
  |         at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:68)
  |         at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:68)
  |         at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:68)
  |         at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
  |         at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
  |         at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:68)
  |         at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:68)
  |         at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  |         at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:68)
  |         at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:149)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |         at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  |         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  |         at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  |         at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
  |         at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  |         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  |         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  |         at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  |         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  |         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  |         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  |         at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |         at java.lang.Thread.run(Thread.java:619)
  | 

I'd like to learn how should I express my rendering condition to make the JBoss EL parser happy. Looked in Seam doc chapter 29, but this chapter does not address my problem. I googled for JBoss EL doc too, only got links to javadoc but not the manual of how to use the JBoss EL ....

Any link to the language manual of JBoss EL or any hint about how to solve my EL-parser-happiness problem would be highly appreciated! 


Regards,
Ellen

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