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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
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 */
package org.glassfish.hk2.configuration.internal;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.Injectee;
import org.glassfish.hk2.api.InjectionResolver;
import org.glassfish.hk2.api.ServiceHandle;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.configuration.api.ChildInject;
import org.glassfish.hk2.configuration.api.ChildIterable;
import org.glassfish.hk2.utilities.reflection.ReflectionHelper;

/**
 * @author jwells
 *
 */
@Singleton
public class ChildInjectResolverImpl implements InjectionResolver {
    @Inject
    private ServiceLocator locator;
    
    @Inject
    private InjectionResolver systemResolver;
    
    @Inject
    private ConfiguredByContext configuredByContext;

    /* (non-Javadoc)
     * @see org.glassfish.hk2.api.InjectionResolver#resolve(org.glassfish.hk2.api.Injectee, org.glassfish.hk2.api.ServiceHandle)
     */
    @Override
    public Object resolve(Injectee injectee, ServiceHandle root) {
        ActiveDescriptor parentDescriptor = injectee.getInjecteeDescriptor();
        if (parentDescriptor == null) {
            // We give up, ask the normal resolver
            return systemResolver.resolve(injectee, root);
        }
        
        // Need to get the real descriptor, not the seed
        parentDescriptor = configuredByContext.getWorkingOn();
        if (parentDescriptor == null) {
            // We give up, ask the normal resolver
            return systemResolver.resolve(injectee, root);
        }
        
        Type requiredType = injectee.getRequiredType();
        Class requiredClass = ReflectionHelper.getRawClass(requiredType);
        if (requiredClass == null) {
            return systemResolver.resolve(injectee, root);
        }
        
        ChildInject childInject = getInjectionAnnotation(injectee.getParent(), injectee.getPosition());
        String prefixName = parentDescriptor.getName();
        if (prefixName == null) prefixName = "";
        String separator = childInject.separator();
        
        prefixName = prefixName + childInject.value();
        
        if (ChildIterable.class.equals(requiredClass) && (requiredType instanceof ParameterizedType)) {
            ParameterizedType pt = (ParameterizedType) requiredType;
            
            // Replace the required type
            requiredType = pt.getActualTypeArguments()[0];
            requiredClass = ReflectionHelper.getRawClass(requiredType);
            if (requiredClass == null) {
                return systemResolver.resolve(injectee, root);
            }
            
            return new ChildIterableImpl