io.crnk.cdi.internal.CdiServiceDiscovery Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of crnk-cdi Show documentation

JSON API with Crnk

There is a newer version: 2.6.20180430102904

package io.crnk.cdi.internal;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.CDI;
import javax.enterprise.util.TypeLiteral;

import io.crnk.core.engine.error.JsonApiExceptionMapper;
import io.crnk.core.engine.internal.utils.ClassUtils;
import io.crnk.core.module.discovery.ServiceDiscovery;
import io.crnk.core.utils.Optional;

/**
 * CDI-based discovery of services.
 *
 * By default makes use of CDI.current() to get a BeanManager instance. An additional setter allows to set a custom
 * BeanManager.
 */
public class CdiServiceDiscovery implements ServiceDiscovery {


	private BeanManager beanManager;


	public void setBeanManager(BeanManager beanManager) {
		this.beanManager = beanManager;
	}

	public BeanManager getBeanManager() {
		if (beanManager != null) {
			return beanManager;
		}
		else {
			return CDI.current().getBeanManager();
		}
	}


	@SuppressWarnings("unchecked")
	@Override
	public  List getInstancesByType(Class clazz) {
		BeanManager beanManager = getBeanManager();

		Type type = clazz;
		if (clazz == JsonApiExceptionMapper.class) {
			TypeLiteral> typeLiteral = new TypeLiteral>() {
			};
			type = typeLiteral.getType();
		}

		Set> beans = beanManager.getBeans(type);
		List list = new ArrayList<>();
		for (Bean bean : beans) {
			CreationalContext creationalContext = beanManager.createCreationalContext(bean);
			T object = (T) beanManager.getReference(bean, type, creationalContext);
			list.add(object);
		}
		return list;
	}

	@Override
	public  List