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CDI 4 SE InjectionManager implementation
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/*
 * Copyright (c) 2017, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.inject.cdi.se;

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

import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.Any;
import javax.enterprise.inject.Default;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.inject.spi.InjectionTarget;
import javax.enterprise.inject.spi.InjectionTargetFactory;
import javax.enterprise.util.AnnotationLiteral;
import javax.inject.Singleton;

import org.glassfish.jersey.process.internal.RequestScope;

/**
 * CDI Class Bean represents {@link CdiRequestScope}.
 *
 * @author Petr Bouda
 */
public class RequestScopeBean implements Bean {

    private final InjectionTarget injectionTarget;

    /**
     * Creates a new Jersey-specific {@link javax.enterprise.inject.spi.Bean} instance.
     */
    public RequestScopeBean(BeanManager beanManager) {
        AnnotatedType annotatedType = beanManager.createAnnotatedType(CdiRequestScope.class);
        InjectionTargetFactory injectionTargetFactory = beanManager.getInjectionTargetFactory(annotatedType);
        this.injectionTarget = injectionTargetFactory.createInjectionTarget(null);
    }

    @Override
    public boolean isNullable() {
        return false;
    }

    @Override
    @SuppressWarnings("unchecked")
    public CdiRequestScope create(CreationalContext context) {
        CdiRequestScope instance = injectionTarget.produce(context);
        injectionTarget.inject(instance, context);
        injectionTarget.postConstruct(instance);
        return instance;
    }

    @Override
    public void destroy(CdiRequestScope instance, CreationalContext context) {
        injectionTarget.preDestroy(instance);
        injectionTarget.dispose(instance);
        context.release();
    }

    @Override
    public Set getTypes() {
        return Collections.singleton(RequestScope.class);
    }

    @Override
    public Set getInjectionPoints() {
        return Collections.emptySet();
    }

    @Override
    public Set getQualifiers() {
        Set qualifiers = new HashSet<>();
        qualifiers.add(new AnnotationLiteral() {});
        qualifiers.add(new AnnotationLiteral() {});
        return qualifiers;
    }

    @Override
    public Class getScope() {
        return Singleton.class;
    }

    @Override
    public String getName() {
        return CdiRequestScope.class.getName();
    }

    @Override
    public Set> getStereotypes() {
        return Collections.emptySet();
    }

    @Override
    public boolean isAlternative() {
        return false;
    }

    @Override
    public Class getBeanClass() {
        return CdiRequestScope.class;
    }
}