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CDI TCK tests
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 * Copyright 2010, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.cdi.tck.tests.extensions.beanManager.bean;

import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertNotNull;
import static org.testng.Assert.assertTrue;

import java.lang.annotation.Annotation;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javax.enterprise.event.Observes;
import javax.enterprise.inject.Default;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanAttributes;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Decorator;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.InjectionTargetFactory;
import javax.enterprise.inject.spi.ProcessManagedBean;
import javax.enterprise.inject.spi.ProducerFactory;

import org.jboss.cdi.tck.util.ForwardingBeanAttributes;

public class BeanExtension implements Extension {

    private Bean zooBean;

    @SuppressWarnings("unchecked")
    void registerBeans(@Observes AfterBeanDiscovery event, BeanManager manager) {
     // create a synthetic class bean
        {
            AnnotatedType oat = manager.createAnnotatedType(Office.class);
            BeanAttributes oa = manager.createBeanAttributes(oat);
            InjectionTargetFactory factory = manager.getInjectionTargetFactory(oat);
            Bean bean = manager.createBean(oa, Office.class, factory);
            event.addBean(bean);
        }
        // create a serializable synthetic class bean
        {
            AnnotatedType oat = manager.createAnnotatedType(SerializableOffice.class);
            BeanAttributes oa = manager.createBeanAttributes(oat);
            InjectionTargetFactory factory = manager.getInjectionTargetFactory(oat);
            Bean bean = manager.createBean(oa, SerializableOffice.class, factory);
            event.addBean(bean);
        }
        // create a synthetic decorator
        {
            AnnotatedType oat = manager.createAnnotatedType(VehicleDecorator.class);
            BeanAttributes oa = addDecoratorStereotype(manager.createBeanAttributes(oat));
            InjectionTargetFactory factory = manager.getInjectionTargetFactory(oat);
            Bean bean = manager.createBean(oa, VehicleDecorator.class, factory);
            assertTrue(bean instanceof Decorator);
            event.addBean(bean);
        }

        assertNotNull(zooBean);

        // create synthetic producer field
        {
            AnnotatedType zoo = manager.createAnnotatedType(Zoo.class);
            assertEquals(1, zoo.getFields().size());
            AnnotatedField field = zoo.getFields().iterator().next();
            BeanAttributes attributes = (BeanAttributes) starveOut(manager.createBeanAttributes(field));
            ProducerFactory factory = manager.getProducerFactory(field, zooBean);
            event.addBean(manager.createBean(attributes, Zoo.class, factory));
        }
        // create synthetic producer method
        {
            AnnotatedType zoo = manager.createAnnotatedType(Zoo.class);
            AnnotatedMethod method = null;
            for (AnnotatedMethod _method : zoo.getMethods()) {
                if (_method.getBaseType().equals(Tiger.class)) {
                    method = _method;
                }
            }
            assertNotNull(method);
            BeanAttributes attributes = (BeanAttributes)  starveOut(manager.createBeanAttributes(method));
            ProducerFactory factory = manager.getProducerFactory(method, zooBean);
            event.addBean(manager.createBean(attributes, Zoo.class, factory));
        }
    }

    void observeZooBean(@Observes ProcessManagedBean event) {
        this.zooBean = event.getBean();
    }

    private  BeanAttributes starveOut(final BeanAttributes attributes) {
        return new ForwardingBeanAttributes() {

            @Override
            public Set getQualifiers() {
                Set qualifiers = new HashSet(attributes.getQualifiers());
                qualifiers.add(Hungry.Literal.INSTANCE);
                qualifiers.remove(Default.Literal.INSTANCE);
                return Collections.unmodifiableSet(qualifiers);
            }

            @Override
            protected BeanAttributes attributes() {
                return attributes;
            }
        };
    }

    private  BeanAttributes addDecoratorStereotype(final BeanAttributes attributes) {
        return new ForwardingBeanAttributes() {

            @Override
            protected BeanAttributes attributes() {
                return attributes;
            }

            @Override
            public Set> getStereotypes() {
                return Collections.> singleton(javax.decorator.Decorator.class);
            }
        };
    }
}