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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
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 *
 * The contents of this file are subject to the terms of either the GNU
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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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package org.jvnet.hk2.config;

import org.jvnet.hk2.config.provider.internal.Creator;

import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

/**
 * {@link org.jvnet.hk2.component.Creator} that returns a typed proxy to {@link Dom}.
 *
 * @author Kohsuke Kawaguchi
 */
@SuppressWarnings("unchecked")
final class DomProxyCreator implements Creator {
    private final Class type;
    
    private final Dom dom;

    private volatile T proxyInstance;

    public DomProxyCreator(Class type, Dom dom) {
        this.type = type;
        this.dom = dom;
    }

    public T create() {
        if (proxyInstance == null) {
            synchronized (this) {
                if (proxyInstance == null) {
                    proxyInstance = (T) dom.createProxy((Class) type);
                }
            }
        }

        return proxyInstance;
    }
}