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package com.sun.faces.application.view;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
import com.sun.faces.util.cdi11.CDIUtil;
import java.util.ServiceLoader;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessBean;
import javax.faces.view.ViewScoped;
/**
* The CDI extension that makes ViewScoped beans work in a CDI context.
*/
public class ViewScopeExtension implements Extension {
private boolean isCdiOneOneOrGreater = false;
private CDIUtil cdiUtil = null;
/**
* Stores the logger.
*/
private static final Logger LOGGER = FacesLogger.APPLICATION_VIEW.getLogger();
/**
* Constructor.
*/
public ViewScopeExtension() {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.finest("Constructor @ViewScoped CDI Extension called");
}
isCdiOneOneOrGreater = Util.isCdiOneOneOrGreater();
}
/**
* Processing bean.
*
* @param event the event.
*/
public void processBean(@Observes ProcessBean<?> event) {
ViewScoped viewScoped = event.getAnnotated().getAnnotation(ViewScoped.class);
if (viewScoped != null && LOGGER.isLoggable(Level.FINEST)) {
LOGGER.finest("Processing occurrence of @ViewScoped");
}
}
/**
* After bean discovery.
*
* @param event the event.
*/
public void afterBeanDiscovery(@Observes final AfterBeanDiscovery event, BeanManager beanManager) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.finest("Adding @ViewScoped context to CDI runtime");
}
event.addContext(new ViewScopeContext());
if (isCdiOneOneOrGreater) {
Class clazz = null;
try {
clazz = Class.forName("com.sun.faces.application.view.ViewScopedCDIEventFireHelperImpl");
} catch (ClassNotFoundException ex) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "CDI 1.1 events not enabled", ex);
}
return;
}
if (null == cdiUtil) {
ServiceLoader<CDIUtil> oneCdiUtil = ServiceLoader.load(CDIUtil.class);
for (CDIUtil oneAndOnly : oneCdiUtil) {
if (null != cdiUtil) {
String message = "Must only have one implementation of CDIUtil available";
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, message);
}
throw new IllegalStateException(message);
}
cdiUtil = oneAndOnly;
}
}
if (null != cdiUtil) {
Bean bean = cdiUtil.createHelperBean(beanManager, clazz);
event.addBean(bean);
} else if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, "Unable to obtain CDI 1.1 utilities for Mojarra");
}
}
}
}