https://issues.apache.org/bugzilla/show_bug.cgi?id=51544
Bug #: 51544
Summary: EL parser problem for EmptyList
Product: Tomcat 7
Version: 7.0.19
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
AssignedTo: dev@tomcat.apache.org
ReportedBy: gl...@abv.bg
Classification: Unclassified
When I return Collections.emptyList() and then use ${list.isEmpty()} in a JSP,
a problem occurs (see below). It didn't occur in older Tomcat 7 versions (like
7.0.5).
15: ${user.names}<br />
16: </div>
17: </c:forEach>
18: <c:if test="${users.isEmpty()}">
19: <div>${msg.noResults}</div>
20: </c:if>
21: </div>
Stacktrace:] with root cause
java.lang.IllegalAccessException: Class javax.el.BeanELResolver can not access
a member of class java.util.Collections$EmptyList with modifiers "public"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:95)
at java.lang.reflect.Method.invoke(Method.java:607)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:467)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:161)
at org.apache.el.parser.AstValue.getValue(AstValue.java:159)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
at
org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:985)
at
org.apache.jsp.WEB_002dINF.jsp.externalUsers_jsp._jspx_meth_c_005fif_005f2(externalUsers_jsp.java:2060)
at
org.apache.jsp.WEB_002dINF.jsp.externalUsers_jsp._jspService(externalUsers_jsp.java:396)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262)
at
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1120)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:890)
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