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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
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 * or LICENSE.txt.  See the License for the specific
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// Portions Copyright [2016-2018] [Payara Foundation and/or its affiliates]

package org.glassfish.weld.services;

import com.sun.ejb.containers.BaseContainer;
import com.sun.ejb.containers.EJBContextImpl;
import com.sun.enterprise.deployment.LifecycleCallbackDescriptor;
import org.jboss.weld.construction.api.AroundConstructCallback;
import org.jboss.weld.construction.api.ConstructionHandle;
import org.jboss.weld.exceptions.WeldException;

import javax.enterprise.inject.spi.AnnotatedConstructor;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.*;

/**
 * This calls back into the ejb container to perform the around construct interception.  When that's finished the
 * ejb itself is then created.
 * @param  instance type
 */
public class JCDIAroundConstructCallback implements AroundConstructCallback {
    private final BaseContainer container;
    private final EJBContextImpl ejbContext;

    // The AroundConstruct interceptor method can access the constructed instance using
    // InvocationContext.getTarget method after the InvocationContext.proceed completes.
    private final AtomicReference target = new AtomicReference<>();

    private ConstructionHandle handle;
    private Object[] parameters;

    public JCDIAroundConstructCallback(BaseContainer container, EJBContextImpl ejbContext) {
        this.container = container;
        this.ejbContext = ejbContext;
    }

    @Override
    public T aroundConstruct(final ConstructionHandle handle, AnnotatedConstructor constructor, Object[] parameters, Map data) {
        this.handle = handle;
        this.parameters = parameters;
        T ejb;
        try {
            container.intercept( LifecycleCallbackDescriptor.CallbackType.AROUND_CONSTRUCT, ejbContext );

            // all the interceptors were invoked, call the constructor now
            if ( target.get() == null ) {
                ejb = handle.proceed( parameters, new HashMap<>() );
                target.set( ejb );
            }
        } catch (RuntimeException e) {
            throw e;
        } catch (Throwable e) {
            throw new WeldException(e);
        }
        return target.get();
    }

    public T createEjb() {
	T instance =null;
	if( null != handle ) {
            instance = handle.proceed(parameters, new HashMap<>() );
	}        
	target.set(instance);
        return instance;
    }
}