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package com.sun.faces.flow;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
import com.sun.faces.util.cdi11.CDIUtil;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.enterprise.context.spi.Contextual;
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.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessBean;
import javax.faces.flow.FlowScoped;
public class FlowCDIExtension implements Extension {
private Map<Contextual<?>, FlowCDIContext.FlowBeanInfo> flowScopedBeanFlowIds;
private boolean isCdiOneOneOrGreater = false;
private CDIUtil cdiUtil = null;
private static final Logger LOGGER = FacesLogger.FLOW.getLogger();
public FlowCDIExtension() {
flowScopedBeanFlowIds = new ConcurrentHashMap<Contextual<?>, FlowCDIContext.FlowBeanInfo>();
isCdiOneOneOrGreater = Util.isCdiOneOneOrGreater();
}
public void processBean(@Observes ProcessBean<?> event) {
FlowScoped flowScoped = event.getAnnotated().getAnnotation(FlowScoped.class);
if (null != flowScoped) {
FlowCDIContext.FlowBeanInfo fbi = new FlowCDIContext.FlowBeanInfo();
fbi.definingDocumentId = flowScoped.definingDocumentId();
fbi.id = flowScoped.value();
flowScopedBeanFlowIds.put(event.getBean(), fbi);
}
}
public void beforeBeanDiscovery(@Observes final BeforeBeanDiscovery event, BeanManager beanManager) {
event.addScope(FlowScoped.class, true, true);
}
void afterBeanDiscovery(@Observes final AfterBeanDiscovery event, BeanManager beanManager) {
event.addContext(new FlowCDIContext(flowScopedBeanFlowIds));
flowScopedBeanFlowIds.clear();
if (isCdiOneOneOrGreater) {
Class clazz = null;
try {
clazz = Class.forName("com.sun.faces.flow.FlowCDIEventFireHelperImpl");
} 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");
}
}
}
}