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package com.sun.faces.facelets.tag.jsf;
import com.sun.faces.facelets.tag.MetaRulesetImpl;
import com.sun.faces.util.Util;
import javax.el.ValueExpression;
import javax.faces.component.UIComponent;
import javax.faces.component.behavior.Behavior;
import javax.faces.component.behavior.ClientBehavior;
import javax.faces.component.behavior.ClientBehaviorHolder;
import javax.faces.context.FacesContext;
import javax.faces.view.AttachedObjectHandler;
import javax.faces.view.AttachedObjectTarget;
import javax.faces.view.BehaviorHolderAttachedObjectTarget;
import javax.faces.view.facelets.*;
import java.beans.BeanDescriptor;
import java.beans.BeanInfo;
import java.io.IOException;
import java.util.List;
/**
*
* @author edburns
*/
class BehaviorTagHandlerDelegateImpl extends TagHandlerDelegate implements AttachedObjectHandler {
private BehaviorHandler owner;
public BehaviorTagHandlerDelegateImpl(BehaviorHandler owner) {
this.owner = owner;
}
@Override
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
// only process if it's been created
if (parent == null || !(parent.getParent() == null)) {
return;
}
if (UIComponent.isCompositeComponent(parent)) {
// Check composite component event name:
BeanInfo componentBeanInfo = (BeanInfo) parent.getAttributes().get(
UIComponent.BEANINFO_KEY);
if (null == componentBeanInfo) {
throw new TagException(
owner.getTag(),
"Error: enclosing composite component does not have BeanInfo attribute");
}
BeanDescriptor componentDescriptor = componentBeanInfo
.getBeanDescriptor();
if (null == componentDescriptor) {
throw new TagException(
owner.getTag(),
"Error: enclosing composite component BeanInfo does not have BeanDescriptor");
}
List<AttachedObjectTarget> targetList = (List<AttachedObjectTarget>)
componentDescriptor
.getValue(AttachedObjectTarget.ATTACHED_OBJECT_TARGETS_KEY);
if (null == targetList) {
throw new TagException(
owner.getTag(),
"Error: enclosing composite component does not support behavior events");
}
String eventName = owner.getEventName();
boolean supportedEvent = false;
for (AttachedObjectTarget target : targetList) {
if (target instanceof BehaviorHolderAttachedObjectTarget) {
BehaviorHolderAttachedObjectTarget behaviorTarget = (BehaviorHolderAttachedObjectTarget) target;
if ((null != eventName && eventName.equals(behaviorTarget.getName()))
|| (null == eventName && behaviorTarget.isDefaultEvent())) {
supportedEvent = true;
break;
}
}
}
if (supportedEvent) {
CompositeComponentTagHandler.getAttachedObjectHandlers(parent)
.add(owner);
} else {
throw new TagException(
owner.getTag(),
"Error: enclosing composite component does not support event "
+ eventName);
}
} else if (parent instanceof ClientBehaviorHolder) {
owner.applyAttachedObject(ctx.getFacesContext(), parent);
} else {
throw new TagException(owner.getTag(), "Parent not an instance of ClientBehaviorHolder: " + parent);
}
}
public void applyAttachedObject(FacesContext context, UIComponent parent) {
FaceletContext ctx = (FaceletContext) context.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
// cast to the ClientBehaviorHolder.
ClientBehaviorHolder behaviorHolder = (ClientBehaviorHolder) parent;
ValueExpression bindingExpr=null;
Behavior behavior=null;
if (null != owner.getBinding()){
bindingExpr = owner.getBinding().getValueExpression(ctx, Behavior.class);
behavior = (Behavior) bindingExpr.getValue(ctx);
}
if (null == behavior){
if (null != owner.getBehaviorId()){
behavior = ctx.getFacesContext().getApplication().createBehavior(owner.getBehaviorId());
if (null == behavior){
throw new TagException(owner.getTag(),
"No Faces behavior defined for Id "+owner.getBehaviorId());
}
if (null != bindingExpr){
bindingExpr.setValue(ctx, behavior);
}
} else {
throw new TagException(owner.getTag(),"No behaviorId defined");
}
}
owner.setAttributes(ctx, behavior);
if (behavior instanceof ClientBehavior) {
behaviorHolder.addClientBehavior(getEventName(behaviorHolder), (ClientBehavior)behavior);
}
}
public MetaRuleset createMetaRuleset(Class type) {
Util.notNull("type", type);
MetaRuleset m = new MetaRulesetImpl(owner.getTag(), type);
m = m.ignore("event");
return m.ignore("binding").ignore("for");
}
public String getFor() {
String result = null;
TagAttribute attr = owner.getTagAttribute("for");
if (null != attr) {
result = attr.getValue();
}
return result;
}
private String getEventName(ClientBehaviorHolder holder){
String eventName;
if (null != owner.getEvent()){
eventName = owner.getEvent().getValue();
} else {
eventName = holder.getDefaultEventName();
}
if (null == eventName){
throw new TagException(owner.getTag(), "The event name is not defined");
}
return eventName;
}
}