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From Benedikt Mohrmann <mohrm...@mail.upb.de>
Subject Plugin ClassCastException
Date Sun, 21 Sep 2008 11:07:50 GMT
Hi,

I already developed a plugin, which works quite well.
Now I tried to develope a new one, export it via Eclipse as a .jar file, 
but when I visit the page, where it should be inserted I get the error:
"Instanziierung des Plugins 'ReadRoomStructurePlugin' fehlgeschlagen."
English: "Instantiation of Plugin 'ReadRoomStructurePlugin' failed.

The Stacktrace says:

2008-09-21 12:48:18,421 [http-localhost%2F127.0.0.1-8080-1] INFO 
com.ecyrd.jspwiki.plugin.PluginManager JSPWiki:/JSPWiki/ 
JSPWiki:http://localhost:8080/JSPWiki/ - Cannot initialize plugin 
ReadRoomStructurePlugin
java.lang.ClassCastException: ReadRoomStructurePlugin cannot be cast to 
com.ecyrd.jspwiki.plugin.WikiPlugin
    at 
com.ecyrd.jspwiki.plugin.PluginManager$WikiPluginInfo.newPluginInstance(PluginManager.java:868)
    at 
com.ecyrd.jspwiki.plugin.PluginManager$WikiPluginInfo.initializePlugin(PluginManager.java:794)
    at 
com.ecyrd.jspwiki.plugin.PluginManager.registerPlugin(PluginManager.java:683)
    at 
com.ecyrd.jspwiki.plugin.PluginManager.execute(PluginManager.java:348)
    at com.ecyrd.jspwiki.forms.FormOutput.execute(FormOutput.java:127)
    at 
com.ecyrd.jspwiki.plugin.PluginManager.execute(PluginManager.java:383)
    at 
com.ecyrd.jspwiki.parser.PluginContent.getText(PluginContent.java:158)
    at org.jdom.output.XMLOutputter.printTextRange(XMLOutputter.java:1054)
    at org.jdom.output.XMLOutputter.printElement(XMLOutputter.java:934)
    at 
org.jdom.output.XMLOutputter.printContentRange(XMLOutputter.java:1007)
    at 
org.jdom.output.XMLOutputter.outputElementContent(XMLOutputter.java:445)
    at 
com.ecyrd.jspwiki.render.XHTMLRenderer.getString(XHTMLRenderer.java:63)
    at 
com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:258)
    at 
com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:299)
    at com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1469)
    at com.ecyrd.jspwiki.WikiEngine.getHTML(WikiEngine.java:1411)
    at 
com.ecyrd.jspwiki.tags.InsertPageTag.doWikiStartTag(InsertPageTag.java:128)
    at com.ecyrd.jspwiki.tags.WikiTagBase.doStartTag(WikiTagBase.java:89)
    at 
org.apache.jsp.templates.default_.PageTab_jsp._jspx_meth_wiki_005fInsertPage_005f0(PageTab_jsp.java:677)
    at 
org.apache.jsp.templates.default_.PageTab_jsp._jspService(PageTab_jsp.java:277)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    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:290)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
    at 
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557)
    at 
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481)
    at 
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
    at 
org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:609)
    at com.ecyrd.jspwiki.tags.IncludeTag.doEndTag(IncludeTag.java:84)
    at 
org.apache.jsp.templates.default_.PageContent_jsp._jspx_meth_wiki_005fInclude_005f0(PageContent_jsp.java:442)
    at 
org.apache.jsp.templates.default_.PageContent_jsp._jspService(PageContent_jsp.java:148)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    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:290)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
    at 
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557)
    at 
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481)
    at 
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
    at 
org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:609)
    at com.ecyrd.jspwiki.tags.ContentTag.doEndTag(ContentTag.java:126)
    at 
org.apache.jsp.templates.default_.ViewTemplate_jsp._jspx_meth_wiki_005fContent_005f0(ViewTemplate_jsp.java:566)
    at 
org.apache.jsp.templates.default_.ViewTemplate_jsp._jspService(ViewTemplate_jsp.java:142)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    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:290)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
    at 
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557)
    at 
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481)
    at 
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
    at 
org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:609)
    at com.ecyrd.jspwiki.tags.IncludeTag.doEndTag(IncludeTag.java:84)
    at org.apache.jsp.Wiki_jsp._jspService(Wiki_jsp.java:114)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    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:290)
    at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at 
com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:99)
    at com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:91)
    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:182)
    at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    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:262)
    at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
    at java.lang.Thread.run(Unknown Source)


Any idea, why it is not able to cast ?

Regards
Benedikt

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