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package javax.faces.render;
import java.util.Iterator;
import javax.faces.FacesWrapper;
import javax.faces.context.FacesContext;
/**
* <p><strong class="changed_modified_2_0 changed_modified_2_3">RenderKitFactory</strong> is a
* factory object that registers
* and returns {@link RenderKit} instances. Implementations of
* JavaServer Faces must provide at least a default implementation of
* {@link RenderKit}. Advanced implementations (or external third party
* libraries) may provide additional {@link RenderKit} implementations
* (keyed by render kit identifiers) for performing different types of
* rendering for the same components.</p>
*
* <p>There must be one {@link RenderKitFactory} instance per web
* application that is utilizing JavaServer Faces. This instance can be
* acquired, in a portable manner, by calling:</p>
* <pre>
* RenderKitFactory factory = (RenderKitFactory)
* FactoryFinder.getFactory(FactoryFinder.RENDER_KIT_FACTORY);
* </pre>
*
* <p class="changed_added_2_3">Usage: extend this class and push the implementation being wrapped to the
* constructor and use {@link #getWrapped} to access the instance being wrapped.</p>
*/
public abstract class RenderKitFactory implements FacesWrapper<RenderKitFactory> {
private RenderKitFactory wrapped;
/**
* @deprecated Use the other constructor taking the implementation being wrapped.
*/
@Deprecated
public RenderKitFactory() {
}
/**
* <p class="changed_added_2_3">If this factory has been decorated,
* the implementation doing the decorating should push the implementation being wrapped to this constructor.
* The {@link #getWrapped()} will then return the implementation being wrapped.</p>
*
* @param wrapped The implementation being wrapped.
*/
public RenderKitFactory(RenderKitFactory wrapped) {
this.wrapped = wrapped;
}
/**
* <p class="changed_modified_2_3">If this factory has been decorated, the
* implementation doing the decorating may override this method to provide
* access to the implementation being wrapped.</p>
*
* @since 2.0
*/
@Override
public RenderKitFactory getWrapped() {
return wrapped;
}
/**
* <p>The render kit identifier of the default {@link RenderKit} instance
* for this JavaServer Faces implementation.</p>
*/
public static final String HTML_BASIC_RENDER_KIT = "HTML_BASIC";
/**
* <p>Register the specified {@link RenderKit} instance, associated with
* the specified <code>renderKitId</code>, to be supported by this
* {@link RenderKitFactory}, replacing any previously registered
* {@link RenderKit} for this identifier.</p>
*
* @param renderKitId Identifier of the {@link RenderKit} to register
* @param renderKit {@link RenderKit} instance that we are registering
*
* @throws NullPointerException if <code>renderKitId</code> or
* <code>renderKit</code> is <code>null</code>
*/
public abstract void addRenderKit(String renderKitId,
RenderKit renderKit);
/**
* <p>Return a {@link RenderKit} instance for the specified render
* kit identifier, possibly customized based on dynamic
* characteristics of the specified {@link FacesContext}, if
* non-<code>null</code>. If there is no registered {@link
* RenderKit} for the specified identifier, return
* <code>null</code>. The set of available render kit identifiers
* is available via the <code>getRenderKitIds()</code> method.</p>
*
* @param context FacesContext for the request currently being
* processed, or <code>null</code> if none is available.
* @param renderKitId Render kit identifier of the requested
* {@link RenderKit} instance
*
* @throws IllegalArgumentException if no {@link RenderKit} instance
* can be returned for the specified identifier
* @throws NullPointerException if <code>renderKitId</code> is
* <code>null</code>
*
* @return a {@link RenderKit} instance
*/
public abstract RenderKit getRenderKit(FacesContext context,
String renderKitId);
/**
* <p>Return an <code>Iterator</code> over the set of render kit
* identifiers registered with this factory. This set must include
* the value specified by <code>RenderKitFactory.HTML_BASIC_RENDER_KIT</code>.
* </p>
*
* @return an <code>Iterator</code> over the set of render kit identifiers
*/
public abstract Iterator<String> getRenderKitIds();
}