i am getting an error when i submit a form.
briefly i have a tree stucture that gets displayed, along with checkboxes to select a particular node. the tree structure is of the type:
class TreeStructure{ private ArrayList children;} //the ArrayList children contains objects of type
//TreeStructure
the structure includes a property 'selected' of type boolean.
My ActionForm includes the tree as a property called 'functions'. i display them as
<html:form action="/saveUserConfig">
<nested:nest property="functions">
<jsp:include page="treenode.jsp"/>
</nested:nest>
<html:submit value="Submit"/>
</html:form>//treenode.jsp is
<nested:root>
<nested:checkbox property="selected" value="true"/>
<nested:write property="nodeName"/><br>
<nested:iterate property="children">
<jsp:include page="treenode.jsp" />
</nested:iterate>
</nested:root>the error i get is exception
javax.servlet.ServletException: BeanUtils.populate
org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1254)
org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)root cause
java.lang.IllegalArgumentException: Null property value for 'functions'
org.apache.commons.beanutils.PropertyUtils.getNestedProperty(PropertyUtils.java:755)
org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.java:801)
org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:796)
org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:729)
org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1252)
org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
please help thanks Ajay
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