org.apache.struts.faces.renderer
Class AbstractRenderer

java.lang.Object
  javax.faces.render.Renderer
      org.apache.struts.faces.renderer.AbstractRenderer

Direct Known Subclasses:

BaseRenderer, CommandLinkRenderer, ErrorsRenderer, FormRenderer, HtmlRenderer, StylesheetRenderer, WriteRenderer

public abstract class AbstractRenderer
extends javax.faces.render.Renderer

Abstract base class for concrete implementations of javax.faces.render.Renderer for the Struts-Faces Integration Library.

Version:

$Rev: 471754 $ $Date: 2006-11-06 08:55:09 -0600 (Mon, 06 Nov 2006) $

Constructor Summary

AbstractRenderer()

Method Summary

void	decode(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Decode any new state of the specified UIComponent from the request contained in the specified FacesContext, and store that state on the UIComponent.
void	encodeBegin(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Render the beginning of the specified UIComponent to the output stream or writer associated with the response we are creating.
void	encodeChildren(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Render the children of the specified UIComponent to the output stream or writer associated with the response we are creating.
void	encodeEnd(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Render the ending of the specified UIComponent to the output stream or writer associated with the response we are creating.
protected void	encodeRecursive(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) Render nested child components by invoking the encode methods on those components, but only when the rendered property is true.
protected String	getAsString(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, Object value) Convert the Object representation of this component's value to the corresponding String representation.
protected boolean	isDisabled(javax.faces.component.UIComponent component) Return true if the specified component is disabled.
protected boolean	isReadOnly(javax.faces.component.UIComponent component) Return true if the specified component is read only.
protected void	renderAttributes(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, javax.faces.context.ResponseWriter writer) Render the element attributes for the generated markup related to this component.
protected void	renderBoolean(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, javax.faces.context.ResponseWriter writer, String[] names) Render any boolean attributes on the specified list that have true values on the corresponding attribute of the specified UIComponent.
protected void	renderEnd(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, javax.faces.context.ResponseWriter writer) Render the element end for the generated markup related to this component.
protected void	renderPassThrough(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, javax.faces.context.ResponseWriter writer, String[] names) Render any attributes on the specified list directly to the specified ResponseWriter for which the specified UIComponent has a non-null attribute value.
protected void	renderStart(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component, javax.faces.context.ResponseWriter writer) Render the element start for the generated markup related to this component.
protected void	setSubmittedValue(javax.faces.context.FacesContext context, javax.faces.component.UIComponent component) If a submitted value was included on this request, store it in the component as appropriate.

Methods inherited from class javax.faces.render.Renderer

convertClientId, getConvertedValue, getRendersChildren

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractRenderer

public AbstractRenderer()

Method Detail

decode

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

Decode any new state of the specified UIComponent from the request contained in the specified FacesContext, and store that state on the UIComponent.

The default implementation calls setSubmittedValue() unless this component has a boolean disabled or readonly attribute that is set to true.

Overrides:

decode in class javax.faces.render.Renderer

Parameters:

context - FacesContext for the current request

component - UIComponent to be decoded

Throws:

NullPointerException - if context or component is null

encodeBegin

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

Render the beginning of the specified UIComponent to the output stream or writer associated with the response we are creating.

The default implementation calls renderStart() and renderAttributes().

Overrides:

encodeBegin in class javax.faces.render.Renderer

Parameters:

context - FacesContext for the current request

component - UIComponent to be decoded

Throws:

NullPointerException - if context or component is null

IOException - if an input/output error occurs

encodeChildren

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

Render the children of the specified UIComponent to the output stream or writer associated with the response we are creating.

The default implementation iterates through the children of this component and renders them.

Overrides:

encodeChildren in class javax.faces.render.Renderer

Parameters:

context - FacesContext for the current request

component - UIComponent to be decoded

Throws:

NullPointerException - if context or component is null

IOException - if an input/output error occurs

encodeEnd

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

Render the ending of the specified UIComponent to the output stream or writer associated with the response we are creating.

The default implementation calls renderEnd().

Overrides:

encodeEnd in class javax.faces.render.Renderer

Parameters:

context - FacesContext for the current request

component - UIComponent to be decoded

Throws:

NullPointerException - if context or component is null

IOException - if an input/output error occurs

encodeRecursive

protected void encodeRecursive(javax.faces.context.FacesContext context,
                               javax.faces.component.UIComponent component)
                        throws IOException

Render nested child components by invoking the encode methods on those components, but only when the rendered property is true.

Throws:

IOException

isDisabled

protected boolean isDisabled(javax.faces.component.UIComponent component)

Return true if the specified component is disabled.

Parameters:

component - UIComponent to be checked

isReadOnly

protected boolean isReadOnly(javax.faces.component.UIComponent component)

Return true if the specified component is read only.

Parameters:

component - UIComponent to be checked

renderAttributes

protected void renderAttributes(javax.faces.context.FacesContext context,
                                javax.faces.component.UIComponent component,
                                javax.faces.context.ResponseWriter writer)
                         throws IOException

Render the element attributes for the generated markup related to this component. Simple renderers that create a single markup element for this component should override this method and include calls to to writeAttribute() and writeURIAttribute on the specified ResponseWriter.

The default implementation does nothing.

Parameters:

context - FacesContext for the current request

component - EditableValueHolder component whose submitted value is to be stored

writer - ResponseWriter to which the element start should be rendered

Throws:

IOException - if an input/output error occurs

renderEnd

protected void renderEnd(javax.faces.context.FacesContext context,
                         javax.faces.component.UIComponent component,
                         javax.faces.context.ResponseWriter writer)
                  throws IOException

Render the element end for the generated markup related to this component. Simple renderers that create a single markup element for this component should override this method and include a call to endElement() on the specified ResponseWriter.

The default implementation does nothing.

Parameters:

context - FacesContext for the current request

component - EditableValueHolder component whose submitted value is to be stored

writer - ResponseWriter to which the element start should be rendered

Throws:

IOException - if an input/output error occurs

renderBoolean

protected void renderBoolean(javax.faces.context.FacesContext context,
                             javax.faces.component.UIComponent component,
                             javax.faces.context.ResponseWriter writer,
                             String[] names)
                      throws IOException

Render any boolean attributes on the specified list that have true values on the corresponding attribute of the specified UIComponent.

Parameters:

context - FacesContext for the current request

component - EditableValueHolder component whose submitted value is to be stored

writer - ResponseWriter to which the element start should be rendered

names - List of attribute names to be passed through

Throws:

IOException - if an input/output error occurs

renderPassThrough

protected void renderPassThrough(javax.faces.context.FacesContext context,
                                 javax.faces.component.UIComponent component,
                                 javax.faces.context.ResponseWriter writer,
                                 String[] names)
                          throws IOException

Render any attributes on the specified list directly to the specified ResponseWriter for which the specified UIComponent has a non-null attribute value. This method may be used to "pass through" commonly used attribute name/value pairs with a minimum of code.

Parameters:

context - FacesContext for the current request

component - EditableValueHolder component whose submitted value is to be stored

writer - ResponseWriter to which the element start should be rendered

names - List of attribute names to be passed through

Throws:

IOException - if an input/output error occurs

renderStart

protected void renderStart(javax.faces.context.FacesContext context,
                           javax.faces.component.UIComponent component,
                           javax.faces.context.ResponseWriter writer)
                    throws IOException

Render the element start for the generated markup related to this component. Simple renderers that create a single markup element for this component should override this method and include a call to startElement() on the specified ResponseWriter.

The default implementation does nothing.

Parameters:

context - FacesContext for the current request

component - EditableValueHolder component whose submitted value is to be stored

writer - ResponseWriter to which the element start should be rendered

Throws:

IOException - if an input/output error occurs

setSubmittedValue

protected void setSubmittedValue(javax.faces.context.FacesContext context,
                                 javax.faces.component.UIComponent component)

If a submitted value was included on this request, store it in the component as appropriate.

The default implementation determines whether this component implements EditableValueHolder. If so, it checks for a request parameter with the same name as the clientId of this UIComponent. If there is such a parameter, its value is passed (as a String) to the setSubmittedValue() method on the EditableValueHolder component.

Parameters:

context - FacesContext for the current request

component - EditableValueHolder component whose submitted value is to be stored

getAsString

protected String getAsString(javax.faces.context.FacesContext context,
                             javax.faces.component.UIComponent component,
                             Object value)
                      throws javax.faces.convert.ConverterException

Convert the Object representation of this component's value to the corresponding String representation. The default implementation utilizes the getAsString() method of any associated Converter.

Parameters:

context - The FacesContext for this request

component - The UIComponent whose value is being converted

value - The Object representation to be converted

Throws:

javax.faces.convert.ConverterException - if conversion fails