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itrules is a Java-based Template Engine. It can generate HTML, XML, SQL, JSON or any other documents from templates. Java code can be separated from the View, allowing to develop applications according to the Model View Controller (MVC).

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/*
 * Copyright 2014 SIANI - ULPGC
 * Octavio Roncal Andrés
 * José Juan Hernández Cabrera
 * José Évora Gomez
 *
 * This File is Part of itrules Project
 *
 * itrules Project is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * itrules Project 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with itrules Library.  If not, see .
 */

package org.siani.itrules.parser;

import org.antlr.v4.runtime.*;

public class TemplateErrorStrategy extends DefaultErrorStrategy {

    private void debugParameters(Parser recognizer) {
        Token token = recognizer.getCurrentToken();
        String[] nameList = recognizer.getTokenNames();
        System.out.println("Line: " + token.getLine());
        System.out.println("Column: " + token.getCharPositionInLine());
        System.out.println("Text Length: " + token.getText().length());
        System.out.println("Token type: " + nameList[token.getType()]);
        System.out.println("Text: " + token.getText().replace("\n", "\\n"));
        System.out.println("Expected tokens: " + recognizer.getExpectedTokens().toString(VocabularyImpl.fromTokenNames(recognizer.getTokenNames())));
    }

    @Override
    public void reportError(Parser recognizer, RecognitionException e) {
        throw new RecognitionException(recognizer, recognizer.getInputStream(), recognizer.getContext());
    }

    @Override
    protected void reportNoViableAlternative(Parser recognizer, NoViableAltException e) {
        super.reportNoViableAlternative(recognizer, e);
        throw new RecognitionException(getMessage(recognizer), recognizer, recognizer.getInputStream(), recognizer.getContext());
    }

    @Override
    protected void reportInputMismatch(Parser recognizer, InputMismatchException e) {
        super.reportInputMismatch(recognizer, e);
        throw new RecognitionException(getMessage(recognizer), recognizer, recognizer.getInputStream(), recognizer.getContext());
    }

    @Override
    protected void reportFailedPredicate(Parser recognizer, FailedPredicateException e) {
        super.reportFailedPredicate(recognizer, e);
        throw new RecognitionException(getMessage(recognizer), recognizer, recognizer.getInputStream(), recognizer.getContext());
    }

    @Override
    protected void reportUnwantedToken(Parser recognizer) {
        super.reportUnwantedToken(recognizer);
        throw new RecognitionException(getMessage(recognizer), recognizer, recognizer.getInputStream(), recognizer.getContext());

    }

    private String getMessage(Parser recognizer) {
        return "Unwanted Token; expected " + recognizer.getExpectedTokens().toString(VocabularyImpl.fromTokenNames(recognizer.getTokenNames()));
    }

    @Override
    protected void reportMissingToken(Parser recognizer) {
        super.reportMissingToken(recognizer);
    }
}