Why do JSTL tags not work properly?

Why can't I use {JSP Tag library name here} with Facelets?

All tag libraries written before Facelets came into existence, were written for and using JSP technology. Which means that unless you have a Facelets implementation of the same tag, the tag won't work. Newer tag libraries often ship with a Facelets implementation too, so contact the maintainer of your tag library, and ask for it. Or write it yourself!

How do I use the JSF 1.2 beforePhase or afterPhase attributesinside of Facelets compositions?

Two things. Fist, in Facelets 1.14 or earlier, the attribute "beforePhase" is misnamed "beforePhaseListener" (same goes for afterPhase). This issue [[http://facelets.dev.java.net/issues/show_bug.cgi?id=294] [294]].

Second, make sure you use this tag with or instead of or :

<f:view beforePhaseListener="#{myBean.myPhaseListenerMethod}">
    <ui:decorate template="/WEB-INF/templates/template.xhtml">
        ....
    </ui:decorate>
</f:view>

Facelets 1.1.11 comes with jars for both Mojarra (JSF RI 1.2) and MyFaces (JSF 1.1) so which one am I running?

The technical differences can be fairly dramatic. Lets say you are iterating over 5,000 items in a list, with c:forEach, you'll end up with 5,000 * the number of child components. This could mean your tree now has 15,000 components in a generation, each with it's own set of state. With ui:repeat, h:dataTable, t:dataList, etc-- these 5,000 items are only represented at the time of rendering, leaving you with a single set of children. Basically, your outputText or input instances are just re-evaluated 5,000 times. StateSaving^? wise, they are also more efficient since between each iteration, it only saves values for those components which are inputs. If you are simply outputting data (no inputs), your StateSize^? shouldn't group by N times.

<-- Facelets pages will use the .xhtml extension -->

<-- Use prefix mapping for Facelets pages, e.g. http://localhost:8080/webapp/faces/mypage.xhtml -->

I'm getting Duplicate ID Errors (and Bindings)

The second way this can happen is when you using 'binding' attributes on your components. If you are binding components to anything other than request-scope, you can run into problems where components, and their assigned identifiers, get injected into another page, conflicting with their identifiers. Again, you can attempt to provide explicit id's to your components to avoid conflict and guarantee uniqueness, but it doesn't fix the greater issue with application/session scoped bindings:

1) UIComponents are not Serializable-- and therefore cannot be clustered

2) UIComponents are not thread safe can cannot be used by multiple requests at once

Binding UIComponents to backing beans is actually something worth doing to ease particular use cases. Instead of using a session/application scoped bean, use a request-scoped composite mediator that receives your session beans and the UIComponent instance to coordinate behavior. The injection of your session-scoped beans can be managed with the faces-config managed-property or with any of the 3rd party extensions such as Spring 2.0 or Seam.

I'm getting a java.lang.IllegalStateException, instead of the Facelets debug screen

You get this exception because some error occurred, and Facelets tries to render the debug screen, but a part of the rendered output were already send to the client. This happens if the Facelets response writer fills up and is thus flushed and send to the client BEFORE the debug output method was invoked.

When part of the rendered output is send to the client, the isCommitted() method of HttpServletResponse will return true and it will not be possible to call HttpServletResonse methods such as reset() or sendRedirect(). These methods are called during generation of the Facelets debug screen.

A response writer will fill up if your (x)html output is larger than the "default" response buffer size, which is may easily be to small. The solution is to increase the web context parameter facelets.BUFFER_SIZE to a sufficiently large value. See the documentation for more information on this parameter.

I'm getting a java.lang.IllegalStateException, instead of my (web.xml) error page

See above

How do I change the response contentType?

<f:view contentType="application/rss+xml"> ... </f:view>

<h:commandLink id="#{action}" value="#{label}" 
                                     action="#{backingBean[action]}"/>

And he calls the template like this:

<a:columnCommand label="Edit" action="editCD" 
backingBean="${CDManagerBean}"/>

The el-jars from the newest facelets-distro require java 5. Where do I find el-jars that work with JDK 1.4?

Use the two jar-files from facelets-1.1.8.

<-- Please do not ask questions here.  Ask questions on the facelets user mailing list. -->

Facelets 1.1.11 comes with RI's for both Sun (JSF 1.2) and MyFaces (JSF 1.1) so which one am I running?

Can I pass a MethodBinding to a template?

No, you can only pass a value binding to a template.

One workaround is to pass the bean as a ValueBinding and hardcode the method name in your template (example needed here).

Another is to pass the bean as a ValueBinding and pass the method as a ValueBinding (example needed here).

There is also an article that discusses using a custom ComponentHandler to pass method bindings.

http://andrewfacelets.blogspot.com/2006/06/creating-composite-controls-with-jsf.html

<-- Please do not ask questions here.  Ask questions on the facelets user mailing list. -->

Why doesn't my • / Å / & render in the output?

You must use the numeric entities for • Å, etc.

Is Facelets in ibiblio or another Maven repository?

It's in the java.net Maven repository:

https://maven-repository.dev.java.net/repository/

groupId : com.sun.facelets artifactId: jsf-facelets

In the pom:

<repositories>
              <repository>
                        <id>dev.java.net</id>
                        <name>dev.java.net-repo </name>
                        <url>https://maven-repository.dev.java.net/repository/</url>
                        <layout>legacy</layout> 
                </repository>

</repositories>

Does Facelets support JSR-168 portlets?

How can I use ADF and Facelets together?

What's the difference between c:forEach and ui:repeat?

What's the difference between using h:outputText v. just the EL, e.g. #{foo) ?

Why are my attributes not set in my component ?

How do I use Facelets and JSP in the same application?

Facelets 1.1.11 comes with RI's for both Sun (JSF 1.2) and MyFaces^? (JSF 1.1) so which one am I running?

What does "Re: SEVERE: Error listenerStart " mean?

How do I insert a non-breaking space?

How do I prevent HTML comments from being rendered?

  <context-param>
    <param-name>facelets.SKIP_COMMENTS</param-name>
    <param-value>true</param-value>
  </context-param>

Why doesn't my c:if / ui:repeat / ui:include work properly?

Build-time (facelet) tags:

• all JSTL tags (e.g. c:if, c:forEach, c:choose)
• all ui tags except ui:repeat (e.g. ui:include, ui:decorate, ui:composition)
• all core faces tags except f:verbatim (e.g. f:validator, f:convertNumber, f:selectItem)

Render-time tags (UIComponents):

• all UIComponent tags (e.g. ui:repeat, h:inputText, t:saveState)

Facelets 1.1.11 comes with RI's for both Sun (JSF 1.2) and MyFaces^? (JSF 1.1) so which one am I running?

Answer

To use the Sun JSF 1.2 RI, simply remove the WEB-INF/lib files myfaces-api-1.1.3-SNAPSHOT.jar and myfaces-impl-1.1.3-SNAPSHOT.jar.

To use the MyFaces^? JSF 1.1 RI (MyFaces^? version 1.1.3 in Facelets 1.1.11) you must remove the WEB-INF/lib files jsf-api.jar and jsf-impl.jar and then download the Apache Jakarta Commons Codec (version 1.3 works) jar file and put it into WEB-INF/lib. The Codec is required by MyFaces^? to perform (URL) Base64 encoding and decoding. To download the "Commons Codec" see http://jakarta.apache.org/commons/codec. These (Myfaces) changes have been used to make Facelets v1.1.11 run under Tomcat 5.5.16 with MyFaces^? release 1.1.3

What does "Re: SEVERE: Error listenerStart " mean?

Answer

> SEVERE: Exception sending context initialized event to listener instance of class com.sun.faces.config.GlassFishConfigureListener
> java.lang.NoSuchMethodError: javax.servlet.ServletContext.getContextPath()Ljava/lang/String;

Then it indicates you are using the Sun RI v1.2 or higher on a container or application server which does not support the Servlet Spec v2.5 or above. An example is Tomcat 5.5 which only supports Servlet v2.4.

How do I use Facelets and JSP in the same application?

Answer

<web-app>
  <context-param>
    <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
    <param-value>.jsp</param-value>
  </context-param>
  <context-param>
    <param-name>facelets.VIEW_MAPPINGS</param-name>
    <param-value>*.xhtml</param-value>
  </context-param>     
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
   </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/faces/*</url-pattern>
  </servlet-mapping>
</web-app>

Does Facelets support JSR-168 portlets?

Answer

What's the difference between c:forEach and ui:repeat?

Answer

Unanswered questions

• How do you use i18n with Facelets?
• Does Facelets support JSR-168 porlets?

Why are my attributes not set in my component ?

The basics about UIComponents and tags can be found in the facelet docs in section UIComponent: https://facelets.dev.java.net/nonav/docs/dev/docbook.html#taglib-create-component

There are different ways in obtaining the tag attribute value in your component. But a plain getter-setter property implementation won't do it.

In JSF 1.1, you have to implement your property foo like this

private String foo = null;
public String getFoo() {
  if (this.foo != null) return this.label;
  ValueBinding vb = this.getValueBinding("foo");
  if (vb != null) return (String) vb.getValue(faces);
  return null;
}
public void setFoo(String foo) {
  this.foo = foo;
}

In JSF 1.2, ValueBinding^? becomes ValueExpression^? and the getter changes a bit

private String foo = null;
public String getFoo() {
  if (this.foo != null) return this.label;
  ValueExpression ve = this.getValueExpression("foo");
  if (ve != null) return (String) ve.getValue(faces.getELContext());
  return null;
}
public void setFoo(String foo) {
  this.foo = foo;
}

alternatives are using getAttributes() within your renderer or overriding the setValueBinding in your component like this

public void setValueBinding(String name, ValueBinding valueBinding) {
  if ("foo".equals(name)) {
    this.foo = valueBinding.get(getFacesContext());
  }
}

How can I use ADF and Facelets together?

 <context-param>
   <param-name>oracle.adf.view.faces.ALTERNATE_VIEW_HANDLER</param-name>
   <param-value>com.sun.facelets.FaceletViewHandler</param-value>
 </context-param>

What's the difference between using h:outputText v. just the EL, e.g. #{foo) ?

Unanswered questions

--++ How do you use i18n with Facelets?

Answer

How do you use i18n with Facelets?

Answer

What's the difference between using h:outputText v. just the EL, e.g. #{foo) ?

Answer