Add a new page

[Migrated From Jforum.net]

Hi,
I would add a new page in JForum but I don't understand the mechanism that lies behind the link, for exmple how is "${contextPath}/${moduleName}/permissions/${node.id}${extension}" formed?
I have to add a page, what are the files I have to modify?
Thanks, bye bye.
[originally posted on jforum.net by abdujaparov]

[Migrated From Jforum.net]

Hi,
I don't understand how JForum link a page. In my case I have to add a page in the group management of JForum.
I have added this line into the templatesMapping.properties:

group.importUser = admin/group_import_user.htm

Then I inseted into TemplateKeys.java this line:

public static final String GROUP_IMPORT_USER  = "group.importUser";

Then I have inserted into the GroupAction.java this method:

public void importUser(){
		
		int id = this.request.getIntParameter("group_id");
		
		this.context.put("sections", sections);
		this.context.put("group", gm.selectById(id));
		this.setTemplateName(TemplateKeys.GROUP_IMPORT_USER);
	}

And then I created the page group_import_user.htm:

<#setting number_format = "#"/>
<style type="text/css">@import url( ${contextPath}/templates/${templateName}/styles/style.css?${startupTime} );</style>

<#import "macros/group_macros.ftl" as lib>

<p>Hello</p>

So I would that when I clink on the link defined in group_list.htm in this way:

<a >${I18n.getMessage("ImportUser")}</a>

JForum opens the group_import_user.htm an shows me Hello.

But I receive this error:

10:04:31,680 ERROR [ExceptionWriter     ] java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.String
	at net.jforum.context.web.WebRequestContext.getParameter(WebRequestContext.java:331)
	at net.jforum.context.web.WebRequestContext.getModule(WebRequestContext.java:457)
	at net.jforum.JForum.service(JForum.java:167)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	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:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)

URL is: /jforum/adminGroups/importUser/3.page?null
10:04:31,696 ERROR [runtime             ] 
Expression session is undefined on line 67, column 162 in default/header.htm.
The problematic instruction:
----------
==> ${session.userId} [on line 67, column 160 in default/header.htm]
 in include "header.htm" [on line 1, column 1 in default/message.htm]
 in include "${templateName}/message.htm" [on line 7, column 9 in exception.html]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Expression session is undefined on line 67, column 162 in default/header.htm.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134)
	at freemarker.core.Dot._getAsTemplateModel(Dot.java:78)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.renderElementToString(Environment.java:1461)
	at freemarker.core.StringLiteral.getStringValue(StringLiteral.java:95)
	at freemarker.core.StringLiteral._getAsTemplateModel(StringLiteral.java:80)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.ListLiteral.getModelList(ListLiteral.java:119)
	at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:89)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.IfBlock.accept(IfBlock.java:82)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.process(Environment.java:176)
	at freemarker.template.Template.process(Template.java:232)
	at net.jforum.exceptions.ExceptionWriter.handleExceptionData(ExceptionWriter.java:115)
	at net.jforum.JForum.handleException(JForum.java:285)
	at net.jforum.JForum.service(JForum.java:205)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	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:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)
10:04:31,711 ERROR [runtime             ] 
Expression session is undefined on line 67, column 162 in default/header.htm.
The problematic instruction:
----------
==> ${session.userId} [on line 67, column 160 in default/header.htm]
 in include "header.htm" [on line 1, column 1 in default/message.htm]
 in include "${templateName}/message.htm" [on line 7, column 9 in exception.html]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Expression session is undefined on line 67, column 162 in default/header.htm.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134)
	at freemarker.core.Dot._getAsTemplateModel(Dot.java:78)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.renderElementToString(Environment.java:1461)
	at freemarker.core.StringLiteral.getStringValue(StringLiteral.java:95)
	at freemarker.core.StringLiteral._getAsTemplateModel(StringLiteral.java:80)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.ListLiteral.getModelList(ListLiteral.java:119)
	at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:89)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.IfBlock.accept(IfBlock.java:82)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.process(Environment.java:176)
	at freemarker.template.Template.process(Template.java:232)
	at net.jforum.exceptions.ExceptionWriter.handleExceptionData(ExceptionWriter.java:115)
	at net.jforum.JForum.handleException(JForum.java:285)
	at net.jforum.JForum.service(JForum.java:205)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	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:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)
10:04:31,711 ERROR [ExceptionWriter     ] 
Expression session is undefined on line 67, column 162 in default/header.htm.
The problematic instruction:
----------
==> ${session.userId} [on line 67, column 160 in default/header.htm]
 in include "header.htm" [on line 1, column 1 in default/message.htm]
 in include "${templateName}/message.htm" [on line 7, column 9 in exception.html]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Expression session is undefined on line 67, column 162 in default/header.htm.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134)
	at freemarker.core.Dot._getAsTemplateModel(Dot.java:78)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.renderElementToString(Environment.java:1461)
	at freemarker.core.StringLiteral.getStringValue(StringLiteral.java:95)
	at freemarker.core.StringLiteral._getAsTemplateModel(StringLiteral.java:80)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.ListLiteral.getModelList(ListLiteral.java:119)
	at freemarker.core.MethodCall._getAsTemplateModel(MethodCall.java:89)
	at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)
	at freemarker.core.Expression.getStringValue(Expression.java:93)
	at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.IfBlock.accept(IfBlock.java:82)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.process(Environment.java:176)
	at freemarker.template.Template.process(Template.java:232)
	at net.jforum.exceptions.ExceptionWriter.handleExceptionData(ExceptionWriter.java:115)
	at net.jforum.JForum.handleException(JForum.java:285)
	at net.jforum.JForum.service(JForum.java:205)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)
	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:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)

The link generated by JForum is: Importa utenti /jforum/adminGroups/importUser/X.page
where X is the number of the line of the group.

Please could someone help me?
Thanks, bye bye.
[originally posted on jforum.net by abdujaparov]

[Migrated From Jforum.net]

FWIW, the error about a class cast exception is coming from a know bug in the error handling code. See:

http://www.coderanch.com/t/578221 #19661

That said, I think that you need to add the group_id parameter definition to the urlPattern.properties file. E.g.,

adminGroups.insertUser.1 = group_id

This file maps the parameter locations to the tags used to get the parameter.. e.g. getIntParameter("group_id").

In the dimm past, jforumURLs used to be a single servlet URL with query strings instead of a .page mapping. E.g.,
/jforum?module=groups&action=insertUser&group_id=1. There is still some legacy code that uses this format. So the urlPattern file maps positional parameters into "named" query parameters so both forms work.
[originally posted on jforum.net by monroe]