/**
* @author Jacob Hookom
* @version $Id$
*/
final class ComponentRule extends MetaRule {
static final class LiteralAttributeMetadata extends Metadata {
private final String name;
private final String value;
public LiteralAttributeMetadata(String name, String value) {
this.value = value;
this.name = name;
}
public void applyMetadata(FaceletContext ctx, Object instance) {
((UIComponent) instance).getAttributes().put(this.name, this.value);
}
}
static final class ValueExpressionMetadata extends Metadata {
private final String name;
private final TagAttribute attr;
private final Class type;
public ValueExpressionMetadata(String name, Class type, TagAttribute attr) {
this.name = name;
this.attr = attr;
this.type = type;
}
public void applyMetadata(FaceletContext ctx, Object instance) {
((UIComponent) instance)
.setValueExpression(this.name, this.attr.getValueExpression(ctx, this.type));
}
}
static final class ValueBindingMetadata extends Metadata {
private final String name;
private final TagAttribute attr;
private final Class type;
public ValueBindingMetadata(String name, Class type, TagAttribute attr) {
this.name = name;
this.attr = attr;
this.type = type;
}
public void applyMetadata(FaceletContext ctx, Object instance) {
((UIComponent) instance)
.setValueBinding(
this.name, new LegacyValueBinding(this.attr.getValueExpression(ctx, this.type)));
}
}
private static final Logger log = FacesLogger.FACELETS_COMPONENT.getLogger();
public static final ComponentRule Instance = new ComponentRule();
public ComponentRule() {
super();
}
public Metadata applyRule(String name, TagAttribute attribute, MetadataTarget meta) {
if (meta.isTargetInstanceOf(UIComponent.class)) {
// if component and dynamic, then must set expression
if (!attribute.isLiteral()) {
Class type = meta.getPropertyType(name);
if (type == null) {
type = Object.class;
}
return new ValueExpressionMetadata(name, type, attribute);
} else if (meta.getWriteMethod(name) == null) {
// this was an attribute literal, but not property
warnAttr(attribute, meta.getTargetClass(), name);
return new LiteralAttributeMetadata(name, attribute.getValue());
}
}
return null;
}
private static void warnAttr(TagAttribute attr, Class type, String n) {
if (log.isLoggable(Level.FINER)) {
log.finer(attr + " Property '" + n + "' is not on type: " + type.getName());
}
}
}
public class ComponentTagHandlerDelegateImpl extends TagHandlerDelegate {
private ComponentHandler owner;
private static final 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>Search the parent for an existing UIComponent of the id we just grabbed
* <li>If found, {@link
* com.sun.faces.facelets.tag.jsf.ComponentSupport#markForDeletion(javax.faces.component.UIComponent)
* mark} its children for deletion.
* <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>Set the UIComponent's id
* <li>Set the RendererType of this instance
* </ol>
* <li>Now apply the nextHandler, passing the UIComponent we've created/found.
* <li>Now add the UIComponent to the passed parent
* <li>Lastly, if the UIComponent already existed (found), then {@link
* ComponentSupport#finalizeForDeletion(UIComponent) finalize} for deletion.
* </ol>
*
* @throws TagException if the UIComponent parent is null
*/
@Override
public void apply(FaceletContext ctx, UIComponent parent) throws IOException {
FacesContext context = ctx.getFacesContext();
// 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 = findChild(ctx, parent, id);
if (null == c
&& context.isPostback()
&& UIComponent.isCompositeComponent(parent)
&& parent.getAttributes().get(id) != null) {
c = findReparentedComponent(ctx, parent, id);
} else {
/**
* If we found a child that is dynamic, the actual parent might have changed, so we need to
* remove it from the actual parent. The reapplyDynamicActions will then replay the actions
* and will make sure it ends up in the correct order.
*/
if (c != null
&& c.getParent() != parent
&& c.getAttributes().containsKey(DYNAMIC_COMPONENT)) {
c.getParent().getChildren().remove(c);
}
}
boolean componentFound = false;
if (c != null) {
componentFound = true;
doExistingComponentActions(ctx, id, c);
} else {
c = this.createComponent(ctx);
doNewComponentActions(ctx, id, c);
assignUniqueId(ctx, parent, id, c);
// hook method
owner.onComponentCreated(ctx, c, parent);
}
CompositeComponentStackManager ccStackManager =
CompositeComponentStackManager.getManager(context);
boolean compcompPushed = pushComponentToEL(ctx, c, ccStackManager);
if (ProjectStage.Development == context.getApplication().getProjectStage()) {
ComponentSupport.setTagForComponent(context, c, this.owner.getTag());
}
// If this this a naming container, stop generating unique Ids
// for the repeated tags
boolean setUniqueIds = false;
boolean oldUnique = false;
if (c instanceof NamingContainer) {
oldUnique = ComponentSupport.setNeedUniqueIds(ctx, false);
setUniqueIds = true;
}
try {
// first allow c to get populated
owner.applyNextHandler(ctx, c);
} finally {
if (setUniqueIds) ComponentSupport.setNeedUniqueIds(ctx, oldUnique);
}
// finish cleaning up orphaned children
if (componentFound) {
doOrphanedChildCleanup(ctx, parent, c);
}
this.privateOnComponentPopulated(ctx, c);
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
addComponentToView(ctx, parent, c, componentFound);
adjustIndexOfDynamicChildren(context, c);
popComponentFromEL(ctx, c, ccStackManager, compcompPushed);
}
private void adjustIndexOfDynamicChildren(FacesContext context, UIComponent parent) {
StateContext stateContext = StateContext.getStateContext(context);
if (!stateContext.hasOneOrMoreDynamicChild(parent)) {
return;
}
List<UIComponent> children = parent.getChildren();
List<UIComponent> dynamicChildren = Collections.emptyList();
for (UIComponent cur : children) {
if (stateContext.componentAddedDynamically(cur)) {
if (dynamicChildren.isEmpty()) {
dynamicChildren = new ArrayList<UIComponent>(children.size());
}
dynamicChildren.add(cur);
}
}
// First remove all the dynamic children, this puts the non-dynamic children at
// their original position
for (UIComponent cur : dynamicChildren) {
int i = stateContext.getIndexOfDynamicallyAddedChildInParent(cur);
if (-1 != i) {
children.remove(cur);
}
}
// Now that the non-dynamic children are in the correct position add the dynamic children
// back in.
for (UIComponent cur : dynamicChildren) {
int i = stateContext.getIndexOfDynamicallyAddedChildInParent(cur);
if (-1 != i) {
if (i < children.size()) {
children.add(i, cur);
} else {
children.add(cur);
}
}
}
}
@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;
}
// ------------------------------------------------------- Protected Methods
protected void addComponentToView(
FaceletContext ctx, UIComponent parent, UIComponent c, boolean componentFound) {
FacesContext context = ctx.getFacesContext();
boolean suppressEvents = ComponentSupport.suppressViewModificationEvents(context);
boolean compcomp = UIComponent.isCompositeComponent(c);
if (suppressEvents && componentFound && !compcomp) {
context.setProcessingEvents(false);
}
ComponentSupport.addComponent(ctx, parent, c);
if (suppressEvents && componentFound && !compcomp) {
context.setProcessingEvents(true);
}
}
protected boolean pushComponentToEL(
FaceletContext ctx, UIComponent c, CompositeComponentStackManager ccStackManager) {
c.pushComponentToEL(ctx.getFacesContext(), c);
boolean compcompPushed = false;
if (UIComponent.isCompositeComponent(c)) {
compcompPushed = ccStackManager.push(c, TreeCreation);
}
return compcompPushed;
}
protected void popComponentFromEL(
FaceletContext ctx,
UIComponent c,
CompositeComponentStackManager ccStackManager,
boolean compCompPushed) {
c.popComponentFromEL(ctx.getFacesContext());
if (compCompPushed) {
ccStackManager.pop(TreeCreation);
}
}
protected void doOrphanedChildCleanup(FaceletContext ctx, UIComponent parent, UIComponent c) {
ComponentSupport.finalizeForDeletion(c);
if (getFacetName(parent) == null) {
FacesContext context = ctx.getFacesContext();
boolean suppressEvents = ComponentSupport.suppressViewModificationEvents(context);
if (suppressEvents) {
// if the component has already been found, it will be removed
// and added back to the view. We don't want to publish events
// for this case.
context.setProcessingEvents(false);
}
// suppress the remove event for this case since it will be re-added
parent.getChildren().remove(c);
if (suppressEvents) {
// re-enable event processing
context.setProcessingEvents(true);
}
}
}
protected void assignUniqueId(FaceletContext ctx, UIComponent parent, String id, UIComponent c) {
// If the id is specified as a literal, and the component is being
// repeated (by c:forEach, for example), use generated unique ids
// after the first instance
if (this.id != null && !(this.id.isLiteral() && ComponentSupport.getNeedUniqueIds(ctx))) {
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);
}
}
protected void doNewComponentActions(FaceletContext ctx, String id, UIComponent c) {
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());
}
}
protected void doExistingComponentActions(FaceletContext ctx, String id, UIComponent c) {
// mark all children for cleaning
if (log.isLoggable(Level.FINE)) {
log.fine(owner.getTag() + " Component[" + id + "] Found, marking children for cleanup");
}
ComponentSupport.markForDeletion(c);
/*
* Repply the id, for the case when the component tree was changed, and the id's are set explicitly.
*/
if (this.id != null) {
c.setId(this.id.getValue(ctx));
}
}
@SuppressWarnings({"UnusedDeclaration"})
protected UIComponent findChild(FaceletContext ctx, UIComponent parent, String tagId) {
return ComponentSupport.findChildByTagId(parent, tagId);
}
@SuppressWarnings({"UnusedDeclaration"})
protected UIComponent findReparentedComponent(
FaceletContext ctx, UIComponent parent, String tagId) {
UIComponent facet = parent.getFacets().get(UIComponent.COMPOSITE_FACET_NAME);
if (facet != null) {
UIComponent newParent = facet.findComponent((String) parent.getAttributes().get(tagId));
if (newParent != null) return ComponentSupport.findChildByTagId(newParent, tagId);
}
return null;
}
// ------------------------------------------------- Package Private Methods
void setCreateCompositeComponentDelegate(CreateComponentDelegate createComponentDelegate) {
this.createCompositeComponentDelegate = createComponentDelegate;
}
/**
* 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) {
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 */
private String getFacetName(UIComponent parent) {
return (String) parent.getAttributes().get(FacetHandler.KEY);
}
interface CreateComponentDelegate {
public UIComponent createComponent(FaceletContext ctx);
public void setCompositeComponent(FacesContext context, UIComponent cc);
public UIComponent getCompositeComponent(FacesContext context);
}
}