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The ANTLR 4 grammar compiler.
There is a newer version: 4.9.0
/*
 * [The "BSD license"]
 *  Copyright (c) 2012 Terence Parr
 *  Copyright (c) 2012 Sam Harwell
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. 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.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.antlr.v4.tool.ast;

import org.antlr.runtime.Token;
import org.antlr.runtime.TokenStream;
import org.antlr.runtime.tree.Tree;
import org.antlr.v4.runtime.misc.NotNull;

import java.util.HashMap;
import java.util.Map;

public class GrammarRootAST extends GrammarASTWithOptions {
	public static final Map defaultOptions = new HashMap();
	static {
		defaultOptions.put("language","Java");
		defaultOptions.put("abstract","false");
	}

    public int grammarType; // LEXER, PARSER, GRAMMAR (combined)
	public boolean hasErrors;
	/** Track stream used to create this tree */
	@NotNull
	public final TokenStream tokenStream;
	public Map cmdLineOptions; // -DsuperClass=T on command line
	public String fileName;

	public GrammarRootAST(GrammarRootAST node) {
		super(node);
		this.grammarType = node.grammarType;
		this.hasErrors = node.hasErrors;
		this.tokenStream = node.tokenStream;
	}

	public GrammarRootAST(Token t, TokenStream tokenStream) {
		super(t);
		if (tokenStream == null) {
			throw new NullPointerException("tokenStream");
		}

		this.tokenStream = tokenStream;
	}

	public GrammarRootAST(int type, Token t, TokenStream tokenStream) {
		super(type, t);
		if (tokenStream == null) {
			throw new NullPointerException("tokenStream");
		}

		this.tokenStream = tokenStream;
	}

	public GrammarRootAST(int type, Token t, String text, TokenStream tokenStream) {
		super(type,t,text);
		if (tokenStream == null) {
			throw new NullPointerException("tokenStream");
		}

		this.tokenStream = tokenStream;
    }

	public String getGrammarName() {
		Tree t = getChild(0);
		if ( t!=null ) return t.getText();
		return null;
	}

	@Override
	public String getOptionString(String key) {
		if ( cmdLineOptions!=null && cmdLineOptions.containsKey(key) ) {
			return cmdLineOptions.get(key);
		}
		String value = super.getOptionString(key);
		if ( value==null ) {
			value = defaultOptions.get(key);
		}
		return value;
	}

	@Override
	public Object visit(GrammarASTVisitor v) { return v.visit(this); }

	@Override
	public GrammarRootAST dupNode() { return new GrammarRootAST(this); }
}