Looking through the code and the exception. This appears to be a bug. It appears that OGNL is mistaking the TreeMap.Values Collection as a java.util.Set, when it attempts to coerce it in ognl.SetPropertyAccessor, you get the noted exception. This should probably be reported as a bug, but one workaround would be to change your PersonService code like this: static public Collection getPeople(){ logger.debug(people.values()); logger.debug(people.values().getClass().toString()); return new ArrayList<>(people.values()); } (*Chris*) On Sat, Jan 12, 2013 at 1:22 PM, Chris Pratt wrote: > You're right Dave, somehow I replied to the wrong email. Looking over the > code now. > (*Chris*) > > > On Sat, Jan 12, 2013 at 1:08 PM, Dave Newton wrote: > >> (Isn't it around where the iterator tag is in that source? I thought >> that *was* the OP's code this second barf of source.) >> >> Dave >> >> >> On Sat, Jan 12, 2013 at 4:04 PM, Chris Pratt >> wrote: >> > You said in your original post that you used the tag, >> > correct? Can I see how you used it? >> > (*Chris*) >> > >> > >> > On Sat, Jan 12, 2013 at 3:06 AM, fusillator >> wrote: >> > >> >> Sorry for my misunderstanding, I changed the code of the wiki tutorial >> >> about wildcard >> >> >> >> These is the view: >> >> >> >> <%@ page language="java" contentType="text/html; charset=UTF-8" >> >> pageEncoding="UTF-8"%> >> >> <%@ taglib prefix="s" uri="/struts-tags" %> >> >> > >> http://www.w3.org/TR/xhtml1/**DTD/xhtml1-transitional.dtd< >> http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd> >> >> "> >> >> >> >> >> >> >> >> List of people >> >> >> >> >> >>

List of persons:

>> >> >> >>
    >> >> >> >>
  1. >> >> >> >> > >> value="id" /> >> >> > value="id" >> >> /> >> >> Edit >> >> Remove >> >>
  2. >> >>
    >> >>
>> >>
>> >> >> >> No person inserted >> >> >> >> >> >> Insert a new person >> >> >> >> >> >> >> >> and this is the action class: >> >> >> >> package org.apache.struts.tutorial.**wildcard.action; >> >> >> >> import java.util.Collection; >> >> //import java.util.List; >> >> import org.apache.struts.tutorial.**wildcard.service.**PersonService; >> >> import org.apache.struts.tutorial.**wildcard.model.Person; >> >> import org.apache.log4j.Logger; >> >> import com.opensymphony.xwork2.**ActionSupport; >> >> >> >> public class PersonAction extends ActionSupport { >> >> >> >> private static final long serialVersionUID = 1L; >> >> >> >> private static final Logger logger = >> Logger.getLogger(PersonAction.** >> >> class.getName()); >> >> >> >> private Collection people=PersonService.**getPeople(); >> >> private int code=-1; //parametro passato da view >> >> private Person personBean; >> >> private PersonService personService=new PersonService(); >> >> >> >> @Override >> >> public String execute(){ >> >> return SUCCESS; >> >> } >> >> >> >> public String edit(){ >> >> setPersonBean(personService.**getPerson(code)); >> >> return INPUT; >> >> } >> >> >> >> public String save(){ >> >> personService.savePerson(**getPersonBean()); >> >> return SUCCESS; >> >> } >> >> >> >> public String remove(){ >> >> personService.removePerson(**code); >> >> return SUCCESS; >> >> } >> >> >> >> public Collection getPeople() { >> >> return people; >> >> } >> >> >> >> public void setPeople(Collection people) { >> >> this.people = people; >> >> } >> >> >> >> public int getCode() { >> >> return code; >> >> } >> >> >> >> public void setCode(int code) { >> >> this.code = code; >> >> } >> >> >> >> public Person getPersonBean() { >> >> return personBean; >> >> } >> >> >> >> public void setPersonBean(Person personBean) { >> >> this.personBean = personBean; >> >> } >> >> >> >> } >> >> >> >> and my modified PersonService class: >> >> >> >> package org.apache.struts.tutorial.**wildcard.service; >> >> >> >> //import java.util.ArrayList; >> >> import java.util.Collection; >> >> //import java.util.List; >> >> import java.util.SortedMap; >> >> import java.util.TreeMap; >> >> >> >> import org.apache.log4j.Logger; >> >> import org.apache.struts.tutorial.**wildcard.model.Person; >> >> >> >> public class PersonService { >> >> >> >> private static final Logger logger = Logger.getLogger(** >> >> PersonService.class.getName())**; >> >> >> >> //static private List peopleList=new ArrayList(); >> >> static private SortedMap people=new >> >> TreeMap(); >> >> static { >> >> people.put(new Integer(1), new >> Person(1,"Paolino","Paperino")**); >> >> people.put(new Integer(2), new Person(2,"Paperon","De >> Paperoni")); >> >> people.put(new Integer(3), new Person(3,"Archimede","** >> >> Pitagorica")); >> >> //generateList(); >> >> } >> >> /* >> >> static void generateList(){ >> >> peopleList.clear(); >> >> for (Integer i : people.keySet()){ >> >> peopleList.add(people.get(i)); >> >> } >> >> } >> >> */ >> >> static public Collection getPeople(){ >> >> logger.debug(people.values()); >> >> logger.debug(people.values().**getClass().toString()); >> >> return people.values(); >> >> } >> >> >> >> public Person getPerson(int code){ >> >> if (code<0) >> >> return new Person(-1,"",""); >> >> else >> >> return people.get(new Integer(code)); >> >> } >> >> >> >> public void savePerson(Person person){ >> >> logger.debug(person); >> >> if (person.getId()>=0){ >> >> people.put(new Integer(person.getId()),**person); >> >> } else { >> >> int id = people.isEmpty() ? 1 : >> people.lastKey().intValue()+1; >> >> person.setId(id); >> >> people.put(new Integer(id),person); >> >> } >> >> //generateList(); >> >> } >> >> >> >> public void removePerson(int code){ >> >> people.remove(new Integer(code)); >> >> //generateList(); >> >> } >> >> >> >> } >> >> >> >> >> >> The mapping definitions are: >> >> >> >> >> >> /view.jsp >> >> /input.jsp >> >> >> >> >> >> The model Person is a pojo with 3 attributes: firstName, lastName, id >> >> >> >> thanks for the support >> >> >> >> Il 12/01/2013 11:50, Umesh Awasthi ha scritto: >> >> >> >> I believe what *Chris* has asked is to copy the code from your JSP >> page >> >>> >> >>> i believe you must be using tag in your JSP page to >> iterate >> >>> some list >> >>> so please copy that code from your JSP and provide here >> >>> >> >>> >> >>> >> >>> On Sat, Jan 12, 2013 at 4:16 PM, fusillator >> wrote: >> >>> >> >>> Hi Chris, not really sure how to find that code... Anyway this has >> been >> >>>> my >> >>>> steps: >> >>>> $ for lib in /opt/struts-2.3.7/lib/* ; do jar tvf $lib | grep tld && >> echo >> >>>> $lib; done >> >>>> 3349 Wed Aug 10 12:51:32 CEST 2005 >> META-INF/sitemesh-decorator.**** >> >>>> tld >> >>>> 3013 Sat May 15 11:55:14 CEST 2004 META-INF/sitemesh-page.tld >> >>>> /opt/struts-2.3.7/lib/****sitemesh-2.4.2.jar >> >>>> 346038 Tue Nov 06 08:13:06 CET 2012 META-INF/struts-tags.tld >> >>>> /opt/struts-2.3.7/lib/struts2-****core-2.3.7.jar >> >>>> 136496 Tue Nov 06 08:24:22 CET 2012 META-INF/struts-dojo-tags.tld >> >>>> /opt/struts-2.3.7/lib/struts2-****dojo-plugin-2.3.7.jar >> >>>> 752 Tue Nov 06 08:27:06 CET 2012 META-INF/tags/JsonPlugin.tld >> >>>> /opt/struts-2.3.7/lib/struts2-****json-plugin-2.3.7.jar >> >>>> 0 Tue May 13 21:39:54 CEST 2008 META-INF/tld/ >> >>>> 27808 Tue May 13 21:39:54 CEST 2008 META-INF/tld/tiles-jsp.tld >> >>>> /opt/struts-2.3.7/lib/tiles-****jsp-2.0.6.jar >> >>>> >> >>>> $ jar xvf /opt/struts-2.3.7/lib/struts2-****core-2.3.7.jar >> >>>> META-INF/struts-tags.tld >> >>>> \decompresso: META-INF/struts-tags.tld >> >>>> >> >>>> $ grep -n "iterator" META-INF/struts-tags.tld >> >>>> 4881: iterator >> >>>> >> >>>> and the tag definition in the tld file is: >> >>>> >> >>>> >> >>>> > value]]> >> >>>> iterator >> >>>> >> org.apache.struts2.****views.jsp.IteratorTag >> >>>> JSP >> >>>> >> >>>> >> >>>> >> >>>> $ find src -name IteratorTag.java >> >>>> src/core/src/main/java/org/****apache/struts2/views/jsp/**** >> >>>> IteratorTag.java >> >>>> >> >>>> $ cat src/core/src/main/java/org/****apache/struts2/views/jsp/** >> >>>> IteratorTag.java >> >>>> /* >> >>>> * $Id: IteratorTag.java 741179 2009-02-05 16:55:14Z musachy $ >> >>>> * >> >>>> * Licensed to the Apache Software Foundation (ASF) under one >> >>>> * or more contributor license agreements. See the NOTICE file >> >>>> * distributed with this work for additional information >> >>>> * regarding copyright ownership. The ASF licenses this file >> >>>> * to you under the Apache License, Version 2.0 (the >> >>>> * "License"); you may not use this file except in compliance >> >>>> * with the License. You may obtain a copy of the License at >> >>>> * >> >>>> * http://www.apache.org/****licenses/LICENSE-2.0< >> http://www.apache.org/**licenses/LICENSE-2.0> >> >>>> > http://www.apache.org/licenses/LICENSE-2.0> >> >>>> > >> >>>> * >> >>>> * Unless required by applicable law or agreed to in writing, >> >>>> * software distributed under the License is distributed on an >> >>>> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY >> >>>> * KIND, either express or implied. See the License for the >> >>>> * specific language governing permissions and limitations >> >>>> * under the License. >> >>>> */ >> >>>> >> >>>> package org.apache.struts2.views.jsp; >> >>>> >> >>>> import javax.servlet.http.****HttpServletRequest; >> >>>> import javax.servlet.http.****HttpServletResponse; >> >>>> import javax.servlet.jsp.****JspException; >> >>>> >> >>>> import org.apache.struts2.components.****Component; >> >>>> import org.apache.struts2.components.****IteratorComponent; >> >>>> >> >>>> import com.opensymphony.xwork2.util.****ValueStack; >> >>>> >> >>>> /** >> >>>> * @see IteratorComponent >> >>>> */ >> >>>> public class IteratorTag extends ContextBeanTag { >> >>>> >> >>>> private static final long serialVersionUID = >> -1827978135193581901L; >> >>>> >> >>>> protected String statusAttr; >> >>>> protected String value; >> >>>> protected String begin; >> >>>> protected String end; >> >>>> protected String step; >> >>>> >> >>>> public Component getBean(ValueStack stack, HttpServletRequest >> req, >> >>>> HttpServletResponse res) { >> >>>> return new IteratorComponent(stack); >> >>>> } >> >>>> >> >>>> protected void populateParams() { >> >>>> super.populateParams(); >> >>>> >> >>>> IteratorComponent tag = (IteratorComponent) getComponent(); >> >>>> tag.setStatus(statusAttr); >> >>>> tag.setValue(value); >> >>>> tag.setBegin(begin); >> >>>> tag.setEnd(end); >> >>>> tag.setStep(step); >> >>>> } >> >>>> >> >>>> public void setStatus(String status) { >> >>>> this.statusAttr = status; >> >>>> } >> >>>> >> >>>> public void setValue(String value) { >> >>>> this.value = value; >> >>>> } >> >>>> >> >>>> public void setBegin(String begin) { >> >>>> this.begin = begin; >> >>>> } >> >>>> >> >>>> public void setEnd(String end) { >> >>>> this.end = end; >> >>>> } >> >>>> >> >>>> public void setStep(String step) { >> >>>> this.step = step; >> >>>> } >> >>>> >> >>>> public int doEndTag() throws JspException { >> >>>> component = null; >> >>>> return EVAL_PAGE; >> >>>> } >> >>>> >> >>>> public int doAfterBody() throws JspException { >> >>>> boolean again = component.end(pageContext.****getOut(), >> >>>> getBody()); >> >>>> >> >>>> if (again) { >> >>>> return EVAL_BODY_AGAIN; >> >>>> } else { >> >>>> if (bodyContent != null) { >> >>>> try { >> >>>> bodyContent.writeOut(****bodyContent.****getEnclosingWriter()); >> >>>> } catch (Exception e) { >> >>>> throw new JspException(e.getMessage()); >> >>>> } >> >>>> } >> >>>> return SKIP_BODY; >> >>>> } >> >>>> } >> >>>> >> >>>> } >> >>>> >> >>>> Thanks a lot for your help. >> >>>> >> >>>> >> >>>> >> >>>> >> >>>> >> >>>> Il 11/01/2013 20:21, Chris Pratt ha scritto: >> >>>> >> >>>> Can you cut and paste your code into the email so we >> can >> >>>>> see? >> >>>>> (*Chris*) >> >>>>> >> >>>>> >> >>>>> On Fri, Jan 11, 2013 at 11:12 AM, fusillator >> >>>>> wrote: >> >>>>> >> >>>>> Hi all, I'm new to struts2/java matters, so be sympathetic please. >> >>>>> >> >>>>>> I've a question about tag >> >>>>>> >> >>>>>> I recently used it to loop on a Iterable collection of type >> >>>>>> java.util.TreeMap$Values retrieved by the method >> >>>>>> java.util.TreeMap.values() >> >>>>>> >> >>>>>> getting the following cast exception: >> >>>>>> >> >>>>>> 2013-01-11 18:45:00,520 DEBUG org.apache.struts.tutorial.** >> >>>>>> wildcard.service.******PersonService.getPeople:33 [Person [1: >> Paolino >> >>>>>> Paperino], Person [2: Paperon De Paperoni], Person [3: Archimede >> >>>>>> Pitagorica]] >> >>>>>> 2013-01-11 18:45:00,523 DEBUG org.apache.struts.tutorial.** >> >>>>>> wildcard.service.******PersonService.getPeople:34 class >> >>>>>> java.util.TreeMap$Values >> >>>>>> 2013-01-11 18:45:00,523 DEBUG org.apache.struts.tutorial.** >> >>>>>> wildcard.service.******PersonService.getPeople:34 class >> >>>>>> java.util.TreeMap$Values >> >>>>>> gen 11, 2013 6:45:01 PM org.apache.jasper.compiler.***** >> >>>>>> *TldLocationsCache >> >>>>>> tldScanJar >> >>>>>> WARNING: Caught an exception while evaluating expression >> >>>>>> 'people.isEmpty' >> >>>>>> against value stack >> >>>>>> java.lang.ClassCastException: java.util.TreeMap$Values cannot be >> cast >> >>>>>> to >> >>>>>> java.util.Set >> >>>>>> at ognl.SetPropertyAccessor.******getProperty(** >> >>>>>> SetPropertyAccessor.java:47) >> >>>>>> at com.opensymphony.xwork2.ognl.******accessor.** >> >>>>>> XWorkCollectionPropertyAccesso******r.getProperty(** >> >>>>>> XWorkCollectionPropertyAccesso******r.java:93) >> >>>>>> at >> ognl.OgnlRuntime.getProperty(******OgnlRuntime.java:2300) >> >>>>>> >> >>>>>> The used variable is reported by log4j. >> >>>>>> Is there any restriction on the iterator tags? >> >>>>>> Could someone suggest me a tutorial/howto about ognl/value stack? >> >>>>>> >> >>>>>> Best regards >> >>>>>> >> >>>>>> >> >>>>>> >> >>>>>> >> ------------------------------******--------------------------**--** >> >>>>>> --**--------- >> >>>>>> To unsubscribe, e-mail: user-unsubscribe@struts.****apac**he.org< >> >>>>>> http://apache.org**> >> >>>>>> > >< >> >>>>>> user-unsubscribe@**struts.apache.org< >> user-unsubscribe@struts.apache.org> >> >>>>>> > >> >>>>>> For additional commands, e-mail: user-help@struts.apache.org >> >>>>>> >> >>>>>> >> >>>>>> >> >>>>>> ------------------------------****----------------------------** >> >>>> --**--------- >> >>>> To unsubscribe, e-mail: user-unsubscribe@struts.**apac**he.org< >> http://apache.org> >> >>>> > user-unsubscribe@struts.apache.org> >> >>>> > >> >>>> For additional commands, e-mail: user-help@struts.apache.org >> >>>> >> >>>> >> >>>> >> >>> >> >> >> >> >> ------------------------------**------------------------------**--------- >> >> To unsubscribe, e-mail: user-unsubscribe@struts.**apache.org< >> user-unsubscribe@struts.apache.org> >> >> >> >> For additional commands, e-mail: user-help@struts.apache.org >> >> >> >> >> >> >> >> -- >> e: davelnewton@gmail.com >> m: 908-380-8699 >> s: davelnewton_skype >> t: @dave_newton >> b: Bucky Bits >> g: davelnewton >> so: Dave Newton >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org >> For additional commands, e-mail: user-help@struts.apache.org >> >> >