[ 
https://issues.apache.org/jira/browse/WW-4813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16087121#comment-16087121
 ] 

Markus Fischer commented on WW-4813:
------------------------------------

Thanks for this great documentation!

Version 1 and 3 do work perfect. However version 2 does lead to an Exception, 
at least if called in a Class extending {{ActionSupport}}:

{code}
com.opensymphony.xwork2.inject.DependencyException: 
com.opensymphony.xwork2.inject.ContainerImpl$MissingDependencyException: No 
mapping found for dependency [type=util.Texti18n, name='default'] in public 
void ch.myPackage.myClass.setI18n(util.Texti18n).
        
com.opensymphony.xwork2.inject.ContainerImpl.addInjectorsForMembers(ContainerImpl.java:145)
        
com.opensymphony.xwork2.inject.ContainerImpl.addInjectorsForMethods(ContainerImpl.java:116)
        
com.opensymphony.xwork2.inject.ContainerImpl.addInjectors(ContainerImpl.java:94)
        
com.opensymphony.xwork2.inject.ContainerImpl$1.create(ContainerImpl.java:75)
        
com.opensymphony.xwork2.inject.ContainerImpl$1.create(ContainerImpl.java:71)
        
com.opensymphony.xwork2.inject.util.ReferenceCache$CallableCreate.call(ReferenceCache.java:155)
        java.util.concurrent.FutureTask.run(FutureTask.java:266)
        
com.opensymphony.xwork2.inject.util.ReferenceCache.internalCreate(ReferenceCache.java:79)
        
com.opensymphony.xwork2.inject.util.ReferenceCache.get(ReferenceCache.java:123)
        
com.opensymphony.xwork2.inject.ContainerImpl.inject(ContainerImpl.java:468)
        
com.opensymphony.xwork2.inject.ContainerImpl$6.call(ContainerImpl.java:507)
        
com.opensymphony.xwork2.inject.ContainerImpl$6.call(ContainerImpl.java:505)
        
com.opensymphony.xwork2.inject.ContainerImpl.callInContext(ContainerImpl.java:560)
        
com.opensymphony.xwork2.inject.ContainerImpl.inject(ContainerImpl.java:505)
        
com.opensymphony.xwork2.ObjectFactory.injectInternalBeans(ObjectFactory.java:158)
        com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:188)
        com.opensymphony.xwork2.ObjectFactory.buildBean(ObjectFactory.java:172)
        
com.opensymphony.xwork2.factory.DefaultActionFactory.buildAction(DefaultActionFactory.java:22)
        
com.opensymphony.xwork2.ObjectFactory.buildAction(ObjectFactory.java:137)
        
com.opensymphony.xwork2.DefaultActionInvocation.createAction(DefaultActionInvocation.java:299)
        
com.opensymphony.xwork2.DefaultActionInvocation.init(DefaultActionInvocation.java:399)
        
com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:204)
        
org.apache.struts2.factory.StrutsActionProxy.prepare(StrutsActionProxy.java:62)
        
org.apache.struts2.factory.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
        
com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
        
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:567)
        
org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
        
org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
{code}

Maybe I am doing this wrong, but using i18n seems to remain quite a bit mor 
complex than it used to be. Do not worry too much. My helper class Texti18n 
does work perfectly and your inputs above do open some more usable options.

> NP with TextProvider and wildcardmapping
> ----------------------------------------
>
>                 Key: WW-4813
>                 URL: https://issues.apache.org/jira/browse/WW-4813
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.5.12
>         Environment: Linux / FF / Java 8
>            Reporter: Markus Fischer
>             Fix For: 2.5.x
>
>
> Probably another corner case around TextProvider in connection with wildcard 
> mapping:
> Embeded elements (in URLs, image tags...) in jsp like {{<s:text 
> name="edit"/>}} throw an NP-Exception.
> {{struts.xml}}
> {code}
>         <action name="**" class="org.package.MyClassDoingNothing">
>           <result name="test">/view/test.jsp</result>
>         </action>
> {code}
> {{test.jsp}} contains an element like this:
> {code}
> <img title="<s:text name="edit"/>" alt="<s:text name="edit"/>" 
> src="editImage.jpg"/>
> {code}
> This will give since 2.5.12 null pointer exception:
> {code}
> ERROR DefaultDispatcherErrorHandler - Exception occurred during processing 
> request: java.lang.NullPointerException
> org.apache.jasper.JasperException: java.lang.NullPointerException
>       at 
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:591)
>       at 
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476)
>       at 
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
>       at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>       at 
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>       at 
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:719)
>       at 
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:465)
>       at 
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:390)
>       at 
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:317)
>       at 
> org.apache.struts2.result.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:173)
>       at 
> org.apache.struts2.result.StrutsResultSupport.execute(StrutsResultSupport.java:208)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:373)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:277)
>       at 
> org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:253)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
>       at 
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:260)
>       at 
> org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:52)
>       at 
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.doIntercept(ConversionErrorInterceptor.java:139)
>       at 
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:134)
>       at 
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:134)
>       at 
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:199)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:69)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:115)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:88)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:246)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:99)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:139)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:157)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:174)
>       at 
> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> org.apache.struts2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:123)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:171)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:201)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:193)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> util.AuthenticationInterceptor.intercept(AuthenticationInterceptor.java:88)
>       at 
> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:247)
>       at 
> org.apache.struts2.factory.StrutsActionProxy.execute(StrutsActionProxy.java:53)
>       at 
> org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:577)
>       at 
> org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
>       at 
> org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>       at customization.RequestFilter.doFilter(RequestFilter.java:57)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
>       at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>       at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
>       at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
>       at 
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
>       at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
>       at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
>       at 
> org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
>       at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
>       at 
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521)
>       at 
> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096)
>       at 
> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674)
>       at 
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
>       at 
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at 
> org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
>       at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.NullPointerException
>       at 
> com.opensymphony.xwork2.ActionSupport.getTextProvider(ActionSupport.java:278)
>       at com.opensymphony.xwork2.ActionSupport.getText(ActionSupport.java:111)
>       at 
> org.apache.struts2.util.TextProviderHelper.getText(TextProviderHelper.java:76)
>       at org.apache.struts2.components.Text.end(Text.java:162)
>       at 
> org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:42)
>       at 
> org.apache.jsp.view.admin_jsp._jspx_meth_s_005ftext_005f23(admin_jsp.java:1441)
>       at 
> org.apache.jsp.view.admin_jsp._jspx_meth_s_005fiterator_005f0(admin_jsp.java:1331)
>       at 
> org.apache.jsp.view.admin_jsp._jspx_meth_s_005fif_005f0(admin_jsp.java:1242)
>       at org.apache.jsp.view.admin_jsp._jspService(admin_jsp.java:269)
>       at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
>       at 
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
>       ... 88 more
> {code}



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