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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2007-2011 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:
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 *
 * Modifications:
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package com.sun.hk2.component;

import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Type;

import org.jvnet.hk2.annotations.Lead;
import org.jvnet.hk2.component.ComponentException;
import org.jvnet.hk2.component.Habitat;
import org.jvnet.hk2.component.Inhabitant;

/**
 * Injection Resolver responsible for Lead Annotation type.
 * 
 * @deprecated this is scheduled for removal
 */
public class LeadInjectionResolver extends InjectionResolver{

    final Habitat habitat;
    
    public LeadInjectionResolver(Habitat habitat) {
        super(Lead.class);
        this.habitat = habitat;
    }
  
    @Override
    public  V getValue(Object component,
                Inhabitant onBehalfOf,
                AnnotatedElement target,
                Type genericType,
                Class type) throws ComponentException {
        Inhabitant lead = onBehalfOf.lead();
        if (lead==null) {
            // TODO: we should be able to check this error at APT, too.
            throw new ComponentException(component.getClass()+" requested @Lead injection but this is not a companion");
        }
        
        if(type==Inhabitant.class) {
            return type.cast(lead);
        }

        // otherwise inject the target object
        return type.cast(lead.get());
    }

}