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Old JAXB Binding Compiler. Contains source code needed for binding customization files into java sources. In other words: the *tool* to generate java classes for the given xml representation.

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/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the "License").  You may not use this file except
 * in compliance with the License.
 * 
 * You can obtain a copy of the license at
 * https://jwsdp.dev.java.net/CDDLv1.0.html
 * See the License for the specific language governing
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL
 * HEADER in each file and include the License file at
 * https://jwsdp.dev.java.net/CDDLv1.0.html  If applicable,
 * add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your
 * own identifying information: Portions Copyright [yyyy]
 * [name of copyright owner]
 */
package com.sun.tools.xjc.generator.util;

import com.sun.codemodel.JBlock;

/**
 * Lazy block reference.
 * 
 * @author
 *     Kohsuke Kawaguchi ([email protected])
 */
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.
     */
    protected abstract JBlock create();
    
    public JBlock get(boolean create) {
        if(!create)     return block;
        if(block==null)
            block = create();
        return block;
    }

}