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What is the equivalent of JSTL <c:forTokens> in JSF or PrimeFaces?

Assume we have the following JSP code:
<c:forTokens items="${someBean.aStringOfIntNumbersSeparatedBySemicolons}"
delims=";"
var="item"
varStatus="stat">
${item}
<c:if test="${!stat.last}">;</c:if>
<c:if test="${stat.count %5 == 0}">
<br/>
</c:if>
</c:forTokens>
Of which the output is rendered in rows with 5 columns each, like so:
How can I possibly do this with the JSF or Primefaces tags?

There is no direct equivalent, you should transform your token into a list in the managed bean and consume the list in the framework components.
List<String> tokens = Arrays.asList("car1,car2,car3,car4".split(","));
For such simple scenario you might not need the primefaces components. When you go for a Object Oriented model, you can take advantage of PF components to iterate through the list and present its fields using data binding. For instance:
DataList - For each Car type in the cars1 list, a line will be added in the list.
<p:dataList value="#{dataListView.cars1}" var="car" type="ordered">
<f:facet name="header">
Basic
</f:facet>
#{car.brand}, #{car.year}
</p:dataList>
DataTable - For each car in cars list, a row is added to the table component.
<p:dataTable var="car" value="#{dtBasicView.cars}">
<p:column headerText="Id">
<h:outputText value="#{car.id}" />
</p:column>
<p:column headerText="Year">
<h:outputText value="#{car.year}" />
</p:column>
<p:column headerText="Brand">
<h:outputText value="#{car.brand}" />
</p:column>
<p:column headerText="Color">
<h:outputText value="#{car.color}" />
</p:column>
</p:dataTable>
Using such component framework you might speed your development focusing on the business logic instead of UI design.

The only working solution I've found
For now, the only working solution I've found lies partly in the JSF and partly in the back-end code:
Edit the back-end code so that it adds a <br/> after every fifth element of that String field aStringOfIntNumbersSeparatedBySemicolons.
Add escape="false" to the <h:outputText> tag that holds the data on the front end. (The default value is escape="true", which renders <br/> as <br/>)

PrimeFaces filling dataTable with List<Object> inside another List<Object>

UPDATE:
I found that the issue with the dataGrid not looping through a list inside a list was an issue on the XML code side. Now the dataGrid is reading the List and looping through it creating panels based on the name. The issue now seems to be accessing certain properties in this List.
<p:dataGrid value="#{objList.objList2}" var="objList2" columns="1">
<p:panel id="obj2" header="#{objList2.name}" toggleable="true" collapsed="false">
<h:panelGrid columns="2" style="width: 100%" columnClasses="scenario-viewer-leftcolumn,scenario-viewer-rightcolumn">
<h:outputText value="Output Name:" />
<p:inputText value="#{objList2.objType}" styleClass="textBoxStyle"/>
<h:outputText value="Output Bool:" />
<p:selectBooleanCheckbox value="#{objList2.boolVar}"/>
</h:panelGrid>
</p:panel>
</p:dataGrid>
</p:panel>
</p:dataGrid>
When I try to access a variable under objList2 is gives me the error saying The class obj2 does not have a readable property 'objType'. I double checked and it does have this property/variable and it is initialized.
What makes this even more strange is if I use objList2.boolVar in place of objList2.name in the header for each panel, it displays the information fine. This proves that the property exists and is initialized. Why wouldn't this work in inputText?? Any help would be greatly appreciated.
ORIGINAL:
I am working with PrimeFaces and trying to create a xhtml form for my UI. I am trying to dynamically display data from a list into a dataGrid structure. I am able to do this successfully, but I also need to display data from a list inside the first list.
For example:
I have a List under the variable objList which I use for my first dataGrid. I am able to loop through this list and create panels for each object and some other String data per object.
<p:dataGrid value="#{scenarioTree.objList}" var="objList" columns="1">
<p:panel id="obj" header="#{objList.name}" toggleable="true" collapsed="true">
<h:panelGrid columns="2" style="width: 100%" columnClasses="scenario-viewer-leftcolumn,scenario-viewer-rightcolumn">
<h:outputText value="text:" />
<p:inputText value="#{objList.variable}" styleClass="textBoxStyle"/>
<h:outputText value="text2:" />
<p:inputText value="#{objList.variable2}" styleClass="textBoxStyle"/>
</h:panelGrid>
Now I want to be able to create a second dataGrid that refers to objList2 which is inside objList1. Doing this though returns No records found in the UI even though there is a bunch of records there.
<p:dataGrid value="#{objList.objList2}" var="objList2" columns="1">
<p:panel id="obj2" header="#{objList2.name}" toggleable="true" collapsed="false">
</p:panel>
</p:dataGrid>
</p:panel>
</p:dataGrid>
Is this a bug with PrimeFaces or am I not able to do this? Or am I doing this wrong?

whenever we are talking about iterating list in xhtml we have dataTable,dataGrid, etc and panelGrid also becoz dataTable and all others are child of panelGrid(we can say this becoz panelGrid is also going to form table and others as well i meant child from this way) so in this case try to iterate the inner list in panelGrid since you are using panelGrid and referring variable is list so internally jsf is going to understand like this:
objList.get(i).getVariable();//For the first row
but according to your code it is understanding like this:
objList.getVariable();
which is not at all present so it is giving issue take out panel i don't find it's use and use like this:
<p:panelGrid value="#{objList}" var="obj">
//Access properties inside that
</p:panelGrid>
you can use <f:facet> tag if you want something in header

Primefaces DataTable - Filtering [column not filtering]

I am trying this example 'DataTable - Filtering'. Everything works except for the Search all fields: textbox that filters. when i enter characters to it it doesn't filter as in the example.
There is no errors or exceptions thrown. I don't undestand what onkeyup="carsTable.filter()" does in the code. can someone explain this ? and any idea why it fails to filter
<f:facet name="header">
<p:outputPanel>
<h:outputText value="Search all fields:" />
<p:inputText id="globalFilter" onkeyup="carsTable.filter()" style="width:150px" />
</p:outputPanel>
</f:facet>

carsTable is the name of the datatable. Somehow its missing from the example, but the p:dataTable should have an attribute widgetVar="carsTable". onkeyup is the event that is firedafter you released a key. It tells the carsTable to filter after you entered a new character.
So add the widgetVar="carsTable" attribute to p:dataTable and you are good to go.
If you have a look at the PrimeFaces userguide, you will find the correct example.

h:dataTable inside ui:repeat, how specify render id from f:ajax?

I have:
<ui:repeat id="projectsTable" var="project" value="#{projectsBacking.projectList}">
#{project.id}
<h:dataTable id="usersAssignedToProject#{project.id}" var="appUser" value="#{projectsBacking.getAllUsersAssignedToProject(project)}">
#{project.id}
<h:column>
<h:outputText value="#{appUser.getUsername()}"/>
</h:column>
</h:dataTable>
</ui:repeat>
Using <f:ajax> I can not render h:dataTable with given id, can someone explain me what is wrong in this code? When I checked by FireBug <table id="usersAssignedToProject">, but in client side #{project.id} was printed (before and inside datatable).

It is because of id of h:dataTable is resolved when components tree is being build, but var project is only available on render response.
Try using c:forEach in this case instead of ui:repeat.
More information on this:
https://rogerkeays.com/jsf-c-foreach-vs-ui-repeat

Server-side DataTable Sorting in RichFaces

I have a data table with a variable number of columns and a data scroller. How can I enable server side sorting? I prefer that it be fired by the user clicking the column header.
<rich:datascroller for="instanceList" actionListener="#{pageDataModel.pageChange}"/>
<rich:dataTable id="instanceList" rows="10" value="#{pageDataModel}"
var="fieldValues" rowKeyVar="rowKey">
<rich:columns value="#{pageDataModel.columnNames}" var="column" index="idx">
<f:facet name="header">
<h:outputText value="#{column}"/>
</f:facet>
<h:outputText value="#{classFieldValues[idx]}" />
</rich:columns>
</rich:dataTable>
I already have a method on the bean for executing the sort.
public void sort(int column)

I ended up doing it manually. I adding a support tag to the header text tag, like so.
<h:outputText value="#{column}">
<a4j:support event="onclick" action="#{pageDataModel.sort(idx)}"
eventsQueue="instancesQueue"
reRender="instanceList,instanceListScroller"/>
</h:outputText>
To get the ascending/descending arrows, I added a css class.
<h:outputText value="#{column}" styleClass="#{pageDataModel.getOrderClass(idx)}" >
<a4j:support event="onclick" action="#{pageDataModel.sort(idx)}"
eventsQueue="instancesQueue"
reRender="instanceList,instanceListScroller"/>
</h:outputText>

There is a fairly elegant solution to this solution here:
http://livedemo.exadel.com/richfaces-demo/richfaces/sortingFeature.jsf?tab=ex-usage
This demo avoids using the tag.

Your datamodel needs to implement "Modifiable" interface.
The datatable will call it's modify() method to do serverside
sorting and filtering.

Have a look at the "sortBy" property of "rich:columns", maybe that's what you're looking for.
Richfaces Reference

Cant you just use Collection.sort() when you retrieve the List?