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JavaCC is a parser/scanner generator for Java.
There is a newer version: 7.0.13
// Copyright 2011 Google Inc. All Rights Reserved.
// Author: [email protected] (Sreeni Viswanadha)

/* Copyright (c) 2006, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Sun Microsystems, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.javacc.jjtree;

import org.javacc.parser.JavaCCGlobals;
import org.javacc.parser.Options;


public class ASTGrammar extends JJTreeNode {
  ASTGrammar(int id) {
    super(id);
  }

  void generate(IO io) {
     System.out.println("opt:" + JJTreeOptions.getOutputLanguage());
    // TODO :: CBA --  Require Unification of output language specific processing into a single Enum class
    if (JJTreeOptions.isOutputLanguageJava()) {
      new JavaCodeGenerator().visit(this, io);
    } else if (JJTreeOptions.getOutputLanguage().equals(Options.OUTPUT_LANGUAGE__CPP)) {
      new CPPCodeGenerator().visit(this, io);
      CPPNodeFiles.generateTreeClasses();
    } else {
    	// Catch all to ensure we don't accidently do nothing
    	throw new RuntimeException("Language type not supported for JJTree : " + JJTreeOptions.getOutputLanguage());
    }
  }

  /** Accept the visitor. **/
  public Object jjtAccept(JJTreeParserVisitor visitor, Object data) {
    return visitor.visit(this, data);
  }
}

/*end*/