AadlAntlrErrorReporter.java

/**
 * AADL-BA-FrontEnd
 * 
 * Copyright © 2013 TELECOM ParisTech and CNRS
 * 
 * TELECOM ParisTech/LTCI
 * 
 * Authors: see AUTHORS
 * 
 * This program is free software: you can redistribute it and/or modify 
 * it under the terms of the Eclipse Public License as published by Eclipse,
 * either version 2.0 of the License, or (at your option) any later version.
 * This program 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
 * Eclipse Public License for more details.
 * You should have received a copy of the Eclipse Public License
 * along with this program.  If not, see 
 * https://www.eclipse.org/legal/epl-2.0/
 */

package org.osate.ba.parser;

import java.util.Arrays;

import org.antlr.v4.runtime.BaseErrorListener;
import org.antlr.v4.runtime.InputMismatchException;
import org.antlr.v4.runtime.NoViableAltException;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.Recognizer;
import org.antlr.v4.runtime.Token;
import org.osate.aadl2.modelsupport.errorreporting.ParseErrorReporter;
import org.osate.utils.internal.Aadl2Utils;

public class AadlAntlrErrorReporter extends BaseErrorListener {
	protected final ParseErrorReporter _errReporter;

	protected final String _filename;

	public AadlAntlrErrorReporter(ParseErrorReporter errReporter, String filename) {
		_errReporter = errReporter;
		_filename = filename;
	}

	@Override
	public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine,
			String msg, RecognitionException e) {
		if (e instanceof NoViableAltException || e instanceof InputMismatchException) {
			if (isKeywordError(offendingSymbol, e)) {
				msg = "symbol not allowed at input \'" + ((Token) offendingSymbol).getText() + "\', reserved symbol";
			}
		}

		_errReporter.error(_filename, line, msg);
	}

	protected boolean isKeywordError(Object offendingSymbol, RecognitionException ex) {
		Token symb = (Token) offendingSymbol;

		if (symb.getType() <= AadlBaLexer.KEYWORD_MAX_ID) // Select only keyword.
		{
			String symbol = '\'' + symb.getText() + '\'';
			return Aadl2Utils.contains(symbol, Arrays.asList(AadlBaLexer.tokenNames));
		} else {
			return false;
		}
	}
}