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package com.sun.faces.facelets.tag.jsf;
import com.sun.faces.component.behavior.AjaxBehaviors;
import com.sun.faces.component.validator.ComponentValidators;
import com.sun.faces.component.CompositeComponentStackManager;
import static com.sun.faces.component.CompositeComponentStackManager.StackType.TreeCreation;
import com.sun.faces.facelets.impl.IdMapper;
import com.sun.faces.facelets.tag.MetaRulesetImpl;
import com.sun.faces.facelets.tag.jsf.core.FacetHandler;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
import javax.el.ValueExpression;
import javax.faces.application.Application;
import javax.faces.application.ProjectStage;
import javax.faces.component.*;
import javax.faces.component.behavior.ClientBehaviorHolder;
import javax.faces.context.FacesContext;
import javax.faces.view.facelets.ComponentConfig;
import javax.faces.view.facelets.ComponentHandler;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.MetaRuleset;
import javax.faces.view.facelets.TagAttribute;
import javax.faces.view.facelets.TagException;
import javax.faces.view.facelets.TagHandlerDelegate;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
public class ComponentTagHandlerDelegateImpl extends TagHandlerDelegate {
private ComponentHandler owner;
private final static Logger log = FacesLogger.FACELETS_COMPONENT.getLogger();
private final TagAttribute binding;
protected String componentType;
protected final TagAttribute id;
private final String rendererType;
private CreateComponentDelegate createCompositeComponentDelegate;
public ComponentTagHandlerDelegateImpl(ComponentHandler owner) {
this.owner = owner;
ComponentConfig config = owner.getComponentConfig();
this.componentType = config.getComponentType();
this.rendererType = config.getRendererType();
this.id = owner.getTagAttribute("id");
this.binding = owner.getTagAttribute("binding");
}
/**
* Method handles UIComponent tree creation in accordance with the JSF 1.2
* spec.
* <ol>
* <li>First determines this UIComponent's id by calling
* {@link javax.faces.view.facelets.ComponentHandler#getTagId()}.</li>
* <li>Search the parent for an existing UIComponent of the id we just
* grabbed</li>
* <li>If found, {@link com.sun.faces.facelets.tag.jsf.ComponentSupport#markForDeletion(javax.faces.component.UIComponent) mark}
* its children for deletion.</li>
* <li>If <i>not</i> found, call
* {@link #createComponent(FaceletContext) createComponent}.
* <ol>
* <li>Only here do we apply
* {@link com.sun.faces.facelets.tag.MetaTagHandlerImpl#setAttributes(FaceletContext, Object)}</li>
* <li>Set the UIComponent's id</li>
* <li>Set the RendererType of this instance</li>
* </ol>
* </li>
* <li>Now apply the nextHandler, passing the UIComponent we've
* created/found.</li>
* <li>Now add the UIComponent to the passed parent</li>
* <li>Lastly, if the UIComponent already existed (found), then
* {@link ComponentSupport#finalizeForDeletion(UIComponent) finalize} for deletion.</li>
* </ol>
*
* @throws TagException
* if the UIComponent parent is null
*/
@Override
public void apply(FaceletContext ctx, UIComponent parent) throws IOException {
// make sure our parent is not null
if (parent == null) {
throw new TagException(owner.getTag(), "Parent UIComponent was null");
}
// our id
String id = ctx.generateUniqueId(owner.getTagId());
// grab our component
UIComponent c = ComponentSupport.findChildByTagId(parent, id);
boolean componentFound = false;
if (c != null) {
componentFound = true;
// mark all children for cleaning
if (log.isLoggable(Level.FINE)) {
log.fine(owner.getTag()
+ " Component["+id+"] Found, marking children for cleanup");
}
ComponentSupport.markForDeletion(c);
} else {
c = this.createComponent(ctx);
if (log.isLoggable(Level.FINE)) {
log.fine(owner.getTag() + " Component["+id+"] Created: "
+ c.getClass().getName());
}
// If this is NOT a composite component...
if (null == createCompositeComponentDelegate) {
// set the attributes and properties into the UIComponent instance.
owner.setAttributes(ctx, c);
}
// otherwise, allow the composite component code to do it.
// mark it owned by a facelet instance
c.getAttributes().put(ComponentSupport.MARK_CREATED, id);
if (ctx.getFacesContext().isProjectStage(ProjectStage.Development)) {
// inject the location into the component
c.getAttributes().put(UIComponent.VIEW_LOCATION_KEY,
owner.getTag().getLocation());
}
// assign our unique id
if (this.id != null) {
c.setId(this.id.getValue(ctx));
} else {
UIViewRoot root = ComponentSupport.getViewRoot(ctx, parent);
if (root != null) {
String uid;
IdMapper mapper = IdMapper.getMapper(ctx.getFacesContext());
String mid = ((mapper != null) ? mapper.getAliasedId(id) : id);
UIComponent ancestorNamingContainer = parent
.getNamingContainer();
if (null != ancestorNamingContainer &&
ancestorNamingContainer instanceof UniqueIdVendor) {
uid = ((UniqueIdVendor) ancestorNamingContainer)
.createUniqueId(ctx.getFacesContext(), mid);
} else {
uid = root.createUniqueId(ctx.getFacesContext(), mid);
}
c.setId(uid);
}
}
if (this.rendererType != null) {
c.setRendererType(this.rendererType);
}
// hook method
owner.onComponentCreated(ctx, c, parent);
}
c.pushComponentToEL(ctx.getFacesContext(), c);
boolean compcompPushed = false;
CompositeComponentStackManager ccStackManager =
CompositeComponentStackManager.getManager(ctx.getFacesContext());
if (UIComponent.isCompositeComponent(c)) {
compcompPushed = ccStackManager.push(c, TreeCreation);
}
// first allow c to get populated
owner.applyNextHandler(ctx, c);
// finish cleaning up orphaned children
if (componentFound) {
ComponentSupport.finalizeForDeletion(c);
if (getFacetName(ctx, parent) == null) {
parent.getChildren().remove(c);
}
}
this.privateOnComponentPopulated(ctx, c, parent);
owner.onComponentPopulated(ctx, c, parent);
// add to the tree afterwards
// this allows children to determine if it's
// been part of the tree or not yet
ComponentSupport.addComponent(ctx, parent, c);
c.popComponentFromEL(ctx.getFacesContext());
if (compcompPushed) {
ccStackManager.pop(TreeCreation);
}
if (shouldMarkInitialState(ctx.getFacesContext())) {
c.markInitialState();
}
}
@Override
public MetaRuleset createMetaRuleset(Class type) {
Util.notNull("type", type);
MetaRuleset m = new MetaRulesetImpl(owner.getTag(), type);
// ignore standard component attributes
m.ignore("binding").ignore("id");
// add auto wiring for attributes
m.addRule(ComponentRule.Instance);
// if it's an ActionSource
if (ActionSource.class.isAssignableFrom(type)) {
m.addRule(ActionSourceRule.Instance);
}
// if it's a ValueHolder
if (ValueHolder.class.isAssignableFrom(type)) {
m.addRule(ValueHolderRule.Instance);
// if it's an EditableValueHolder
if (EditableValueHolder.class.isAssignableFrom(type)) {
m.ignore("submittedValue");
m.ignore("valid");
m.addRule(EditableValueHolderRule.Instance);
}
}
// if it's a selectone or selectmany
if (UISelectOne.class.isAssignableFrom(type) || UISelectMany.class.isAssignableFrom(type)) {
m.addRule(RenderPropertyRule.Instance);
}
return m;
}
void setCreateCompositeComponentDelegate(CreateComponentDelegate createComponentDelegate) {
this.createCompositeComponentDelegate = createComponentDelegate;
}
/**
* @param ctx the <code>FacesContext</code> for the current request.
* @return <code>true</code> if <code>UIComponent.markInitialState()</code>
* should be called on the component that is being processed, otherwise
* return <code>false</code>
*/
private boolean shouldMarkInitialState(FacesContext ctx) {
// RELEASE_PENDING - this is *ugly*. We need to *not*
// call PartialStateHolder.markInitialState() if the component
// has a composite component parent under the assumption that
// the CompositeComponentTagHandler will take care of it.
return (Boolean.TRUE.equals(ctx.getAttributes().get("partialStateSaving"))
&& UIComponent.getCurrentCompositeComponent(ctx) == null);
}
/**
* If the binding attribute was specified, use that in conjuction with our
* componentType String variable to call createComponent on the Application,
* otherwise just pass the componentType String.
* <p />
* If the binding was used, then set the ValueExpression "binding" on the
* created UIComponent.
*
* @see Application#createComponent(javax.faces.el.ValueBinding,
* javax.faces.context.FacesContext, java.lang.String)
* @see Application#createComponent(java.lang.String)
* @param ctx
* FaceletContext to use in creating a component
* @return
*/
private UIComponent createComponent(FaceletContext ctx) {
if (null != createCompositeComponentDelegate) {
return createCompositeComponentDelegate.createComponent(ctx);
}
UIComponent c;
FacesContext faces = ctx.getFacesContext();
Application app = faces.getApplication();
if (this.binding != null) {
ValueExpression ve = this.binding.getValueExpression(ctx,
Object.class);
c = app.createComponent(ve, faces, this.componentType, this.rendererType);
if (c != null) {
// Make sure the component supports 1.2
c.setValueExpression("binding", ve);
}
} else {
c = app.createComponent(faces, this.componentType, this.rendererType);
}
return c;
}
/*
* Internal hook that allows us to perform common processing for all
* components after they are populated. At the moment, the only common
* processing we need to perform is applying wrapping AjaxBehaviors,
* if any exist.
*/
private void privateOnComponentPopulated(FaceletContext ctx, UIComponent c, UIComponent parent) {
if (c instanceof ClientBehaviorHolder) {
FacesContext context = ctx.getFacesContext();
AjaxBehaviors ajaxBehaviors = AjaxBehaviors.getAjaxBehaviors(context, false);
if (ajaxBehaviors != null) {
ajaxBehaviors.addBehaviors(context, (ClientBehaviorHolder)c);
}
}
if (c instanceof EditableValueHolder) {
processValidators(ctx.getFacesContext(), (EditableValueHolder) c);
}
}
/**
* Process default validatior/wrapping validation information and install
* <code>Validators</code> based off the result.
*/
private void processValidators(FacesContext ctx,
EditableValueHolder editableValueHolder) {
ComponentValidators componentValidators =
ComponentValidators.getValidators(ctx, false);
if (componentValidators != null) {
// process any elements on the stack.
componentValidators.addValidators(ctx, editableValueHolder);
} else {
// no custom handling required, so add the default validators
ComponentValidators.addDefaultValidatorsToComponent(ctx, editableValueHolder);
}
}
/**
* Return the Facet name we are scoped in, otherwise null
* @param ctx
* @return
*/
private String getFacetName(FaceletContext ctx, UIComponent parent) {
return (String) parent.getAttributes().get(FacetHandler.KEY);
}
interface CreateComponentDelegate {
public UIComponent createComponent(FaceletContext ctx);
}
}