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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.tools.internal.xjc.generator.util;

import com.sun.codemodel.internal.JBlock;

Lazy block reference.
Author:

    Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)/**
 * Lazy block reference.
 *
 * @author
 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public abstract class LazyBlockReference implements BlockReference {

    private JBlock block = null;

    
Called when a block needs to be created.
Only called once in the whole life time of this object.
/**
     * Called when a block needs to be created.
     * Only called once in the whole life time of this object.
     */
    protected abstract JBlock create();

    public JBlock get(boolean create) {
        if(!create)     return block;
        if(block==null)
            block = create();
        return block;
    }

}