type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: java.lang.ClassCastException: net.ontopia.topicmaps.impl.basic.Occurrence cannot be cast to net.ontopia.topicmaps.core.TopicIF org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:532) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
java.lang.ClassCastException: net.ontopia.topicmaps.impl.basic.Occurrence cannot be cast to net.ontopia.topicmaps.core.TopicIF net.ontopia.topicmaps.nav2.utils.TreeWidget.getTopic(TreeWidget.java:476) net.ontopia.topicmaps.nav2.utils.TreeWidget.run(TreeWidget.java:224) net.ontopia.topicmaps.nav2.utils.TreeWidget.run(TreeWidget.java:206) org.apache.jsp.categories_jsp._jspService(categories_jsp.java:151) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:722) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:417) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.10 logs.