com.flowlogix.web.services.internal.CDIObjectProvider Maven / Gradle / Ivy

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Flow Logix Utility Library for Tapestry

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/**
 * @(#)CDIObjectProvider.java
 *
 * Copyright 2009 by Movellas ApS
 * All rights reserved. 
 */
package com.flowlogix.web.services.internal;

import com.flowlogix.cdi.CDIFactory;
import java.util.Set;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.context.RequestScoped;
import javax.enterprise.inject.spi.Bean;
import javax.inject.Singleton;
import org.apache.tapestry5.ioc.AnnotationProvider;
import org.apache.tapestry5.ioc.ObjectLocator;
import org.apache.tapestry5.ioc.ObjectProvider;
import org.apache.tapestry5.ioc.annotations.Local;
import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
import org.slf4j.Logger;

/**
 * 
 * @author Magnus
 */
public class CDIObjectProvider implements ObjectProvider {
	
	private Logger log;
	private CDIFactory cdiFactory;
		
	@SuppressWarnings({ "unchecked", "rawtypes" })
	private Set allowedScopes = CollectionFactory.newSet(
			ApplicationScoped.class,
			Singleton.class,
			RequestScoped.class);

	public CDIObjectProvider(
			Logger log,
			@Local CDIFactory cdiFactory) {
		this.log = log;
		this.cdiFactory = cdiFactory; 
	}

	@SuppressWarnings("unchecked")
	public  T provide(Class objectType,
			AnnotationProvider annotationProvider, ObjectLocator locator) {
		
		/**
		 * Problem: in many cases a tapestry service will qualify as a cdi bean.
		 * In order to prevent cdi for managing a service that should be provided by tapestry we check if locator has the service.
		 * 
		 * The MasterObjectProvider will attempt to delegate to locator after all providers has been asked. 
		 */
//		try {
//			if(locator.getService(objectType)!=null)
//				return null;
//		} catch (RuntimeException e) {
//		}
		
		return cdiFactory.get(objectType);
		
//		Set> beans =  beanManager.getBeans(objectType);
//		if(beans!=null && beans.size()>0) {
//			Bean bean = (Bean) beans.iterator().next();		
//			if(hasValidScope(bean)) {
//				CreationalContext ctx = beanManager.createCreationalContext(bean);
//				T o = (T) beanManager.getReference(bean, objectType, ctx); 
//				log.info("Found and returning: "+objectType.getCanonicalName());
//				return o;	
//			}
//		}
//		return null;
	}
	
	protected  boolean hasValidScope(Bean bean) {
		return bean!=null && allowedScopes.contains(bean.getScope());
	}
}