org.apache.myfaces.trinidaddemo.composite
Class DateFieldAsRenderer

java.lang.Object
  javax.faces.render.Renderer
      org.apache.myfaces.trinidaddemo.composite.DateFieldAsRenderer

public class DateFieldAsRenderer
extends javax.faces.render.Renderer

An experiment in building a renderer that uses a composite component strategy to render. Some basic principles:

• The child components get re-created on each pass through the system; this means seeing if they exist in both Apply Request Values (decode()) and Render Response (encodeBegin()), and marking the components transient so they don't get saved.
• The model is the tricky part: instead of using real ValueBindings on the children, I let them use local values, and then manully transfer over their local values into an overall "local value" during validate(). Unfortunately, using ValueBindings to automate the transfer wouldn't quite work, since the transfer wouldn't happen 'til Update Model, which is too late to preserve the semantics of an editable value component in JSF.

Constructor Summary

DateFieldAsRenderer()

Method Summary

void	decode(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component)
void	encodeBegin(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component)
void	encodeChildren(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component)
Object	getConvertedValue(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, Object submittedValue)
boolean	getRendersChildren()

Methods inherited from class javax.faces.render.Renderer

convertClientId, encodeEnd

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DateFieldAsRenderer

public DateFieldAsRenderer()

Method Detail

decode

public void decode(javax.faces.context.FacesContext context,
                   javax.faces.component.UIComponent component)

Overrides:

decode in class javax.faces.render.Renderer

getConvertedValue

public Object getConvertedValue(javax.faces.context.FacesContext context,
                                javax.faces.component.UIComponent component,
                                Object submittedValue)

Overrides:

getConvertedValue in class javax.faces.render.Renderer

encodeBegin

public void encodeBegin(javax.faces.context.FacesContext context,
                        javax.faces.component.UIComponent component)
                 throws IOException

Overrides:

encodeBegin in class javax.faces.render.Renderer

Throws:

IOException

encodeChildren

public void encodeChildren(javax.faces.context.FacesContext context,
                           javax.faces.component.UIComponent component)
                    throws IOException

Overrides:

encodeChildren in class javax.faces.render.Renderer

Throws:

IOException

getRendersChildren

public boolean getRendersChildren()

Overrides:

getRendersChildren in class javax.faces.render.Renderer