@Override
public <T> T get(final Contextual<T> component, final CreationalContext<T> creationalContext) {
assertActive();
T instance = get(component);
if (instance == null) {
if (creationalContext != null) {
Map<Contextual<?>, Object> componentInstanceMap = getComponentInstanceMap();
Map<Contextual<?>, CreationalContext<?>> creationalContextMap = getCreationalInstanceMap();
synchronized (componentInstanceMap) {
instance = (T) componentInstanceMap.get(component);
if (instance == null) {
instance = component.create(creationalContext);
if (instance != null) {
componentInstanceMap.put(component, instance);
creationalContextMap.put(component, creationalContext);
}
}
}
}
}
return instance;
}
/**
* @param bean
* @param creationalContext
* @param <T>
* @return
*/
public <T> T createContextualInstance(
Contextual<T> bean, CreationalContext<T> creationalContext) {
Object beanKey = getBeanKey(bean);
if (isConcurrent()) {
// locked approach
ContextualInstanceInfo<T> instanceInfo = new ContextualInstanceInfo<T>();
ConcurrentHashMap<Object, ContextualInstanceInfo<?>> concurrentMap =
(ConcurrentHashMap<Object, ContextualInstanceInfo<?>>) contextualInstances;
ContextualInstanceInfo<T> oldInstanceInfo =
(ContextualInstanceInfo<T>) concurrentMap.putIfAbsent(beanKey, instanceInfo);
if (oldInstanceInfo != null) {
instanceInfo = oldInstanceInfo;
}
synchronized (instanceInfo) {
T instance = instanceInfo.getContextualInstance();
if (instance == null) {
instance = bean.create(creationalContext);
instanceInfo.setContextualInstance(instance);
instanceInfo.setCreationalContext(creationalContext);
}
return instance;
}
} else {
// simply create the contextual instance
ContextualInstanceInfo<T> instanceInfo = new ContextualInstanceInfo<T>();
instanceInfo.setCreationalContext(creationalContext);
instanceInfo.setContextualInstance(bean.create(creationalContext));
contextualInstances.put(beanKey, instanceInfo);
return instanceInfo.getContextualInstance();
}
}
public <T> T get(Scope scope, Contextual<T> contextual, CreationalContext<T> creationalContext) {
RequestContext ctx = currentContext.get();
if (ctx == null) throw new ContextNotActiveException();
if (!scope.isActive(ctx)) throw new ContextNotActiveException();
Object o = ctx.getContextualValue(scope, contextual);
if (o == null) {
if (creationalContext != null) {
o = contextual.create(creationalContext);
ctx.setContextualValue(scope, contextual, o);
}
}
return (T) o;
}
public <T> T get(Contextual<T> component, CreationalContext<T> creationalContext) {
Map<Contextual, TransactionBeanEntry> transactionBeanEntryMap =
getBeanStorage().getActiveTransactionContext();
if (transactionBeanEntryMap == null) {
throw new ContextNotActiveException(
"Not accessed within a transactional method - use @" + Transactional.class.getName());
}
TransactionBeanEntry transactionBeanEntry = transactionBeanEntryMap.get(component);
if (transactionBeanEntry != null) {
return (T) transactionBeanEntry.getContextualInstance();
}
// if it doesn't yet exist, we need to create it now!
T instance = component.create(creationalContext);
transactionBeanEntry = new TransactionBeanEntry(component, instance, creationalContext);
transactionBeanEntryMap.put(component, transactionBeanEntry);
return instance;
}
/**
* Create the bean.
*
* @param <T> the type.
* @param facesContext the faces context.
* @param contextual the contextual.
* @param creational the creational.
* @return the value or null if not found.
*/
public <T> T createBean(
FacesContext facesContext, Contextual<T> contextual, CreationalContext<T> creational) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, "Creating @ViewScoped CDI bean using contextual: {0}", contextual);
}
if (!(contextual instanceof PassivationCapable)) {
throw new IllegalArgumentException(
"ViewScoped bean " + contextual.toString() + " must be PassivationCapable, but is not.");
}
T result = contextual.create(creational);
if (result != null) {
String name = getName(result);
facesContext.getViewRoot().getViewMap(true).put(name, result);
String passivationCapableId = ((PassivationCapable) contextual).getId();
getContextMap(facesContext)
.put(passivationCapableId, new ViewScopeContextObject(passivationCapableId, name));
}
return result;
}