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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/>)

Error p:ajax update

In an edit screen, I'm using p:ajax to grab the selected value in an autocomplete field and fill in other fields in the form. But when ajax is running in question it is updating the information in the database table (update). How do I block this behavior? After all I should only do this when I clicked the save button.
Code:
<h:panelGroup>
<p:autoComplete id="demandaBeanDemandaLogradouroNome" value="#{demandaBean.demanda.logradouro}"
var="_item" minQueryLength="3" maxResults="15" required="true"
itemLabel="#{_item.nome}" itemValue="#{_item}" converter="#{logradouroBean.converter}"
completeMethod="#{logradouroBean.buscaLogradouro}" title="Busca pelo Logradouro">
<p:column>
<h:outputText value="#{_item.categoria.descricao}"/>
</p:column>
<p:column>
<h:outputText value="#{_item.nome}"/>
</p:column>
<p:ajax partialSubmit="true" immediate="true" event="itemSelect" update="demandaBeanDemandaBairro demandaBeanDemandaCruzamento"
listener="#{logradouroBean.buscaComplementoSelectEvent}"/>
</p:autoComplete>
<p:message for="demandaBeanDemandaLogradouroNome" styleClass="error"/>
</h:panelGroup>

I have found that what happens is that Hibernate synchronizes the persistent objects and if you change it it automatically updates in the database. To solve, I used an auxiliary object with the #Transient tag. Thanks.

Primefaces datatable: partial processing on row selection

I have a primefaces datatable with ajax events to handle multiple row selection. Within the table I also have some in-place editing components. The problem is that whenever I select a row, the whole table gets processed, including the input components.
Is there a way to only process the row selections, not the inputs?
example xhtml...
<p:dataTable value="#{controller.data}" var="d" rowKey="#{d.id}"
selection="#{controller.selected}" rowSelectMode="add">
<p:ajax event="rowSelect" partialSubmit="true" process="#this"
update=":anotherComponent"/>
<!-- ...and other events -->
<p:column selectionMode="multiple"/>
<p:column>
<p:inplace editor="true" saveLabel="Apply changes" >
<p:inputText value="#{d.value}"/>
<p:ajax event="save" partialSubmit="true" process="#this"
listener="#{controller.saveChanges(d)}"/>
</p:inplace>
</p:column>
<!-- ...and other columns -->
</p:dataTable>

Unfortunately there is no official way to do this. I reported this to the PF team a half year ago and they promised that they will introduce something like process="#onlyThis", but there is no ETA for this enhancement.

get row number in primefaces datatable by clicking button in row

how can I get row number in Primefaces (2.2) DataTable by clicking button in some row?
I need pass this number to javascript code with prompt() function.
1 solution
using WidgetVar.selection but in this case I use manually row selection and then click button -> bad scenario.
<p:column>
<p:commandButton id="someButton" value="Button"
actionListener="#{managedBean.someEvent}" onclick="return jsMethod(widgetVar.selection)" />
</p:column>
Thank You!

You can use UIData#getRowIndex() for this.
<p:dataTable binding="#{table}" ...>
<p:column>
<p:commandButton ... onclick="return jsMethod(#{table.rowIndex})" />
</p:column>
</p:dataTable>

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.