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A Java to TypeScript/JavaScript Open Transpiler
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/* 
 * JSweet transpiler - http://www.jsweet.org
 * Copyright (C) 2015 CINCHEO SAS 
 * 
 * This program 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.
 *  
 * 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
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
package org.jsweet.transpiler;

import java.io.File;
import java.util.Locale;

import javax.tools.Diagnostic;
import javax.tools.Diagnostic.Kind;
import javax.tools.DiagnosticListener;
import javax.tools.JavaFileObject;

import org.apache.log4j.Logger;

/**
 * This class takes care of formatting and reporting errors reported by Javac.
 * 
 * @author Renaud Pawlak
 */
public class JSweetDiagnosticHandler implements DiagnosticListener {

    /**
     * The transpilation message/warning/error handler.
     */
    protected TranspilationHandler transpilationHandler;
    /**
     * The transpilation context.
     */
    protected JSweetContext context;
    private final static Logger logger = Logger.getLogger(JSweetTranspiler.class);

    /**
     * Creates a new diagnostic handler.
     */
    public JSweetDiagnosticHandler(TranspilationHandler transpilationHandler, JSweetContext context) {
        this.context = context;
        this.transpilationHandler = transpilationHandler;
    }

    /**
     * Override this method to tune how JSweet reports the errors.
     * 
     * @param diagnostic a Java-reported diagnostic (errors, warning, etc.)
     * @param locale     a locale
     */
    protected void reportJavaError(Diagnostic diagnostic, Locale locale) {
        transpilationHandler.report(JSweetProblem.INTERNAL_JAVA_ERROR, //
                new SourcePosition( //
                        new File(diagnostic.getSource() == null ? "." : diagnostic.getSource().getName()), //
                        null, //
                        (int) diagnostic.getLineNumber(), //
                        (int) diagnostic.getColumnNumber() //
                ), //
                diagnostic.getMessage(locale));
    }

    private boolean ignoreError(Diagnostic diagnostic) {
        if (context.options.isIgnoreJavaErrors()) {
            return true;
        }

        if (context.options.isIgnoreJavaFileNameError()
                && "compiler.err.class.public.should.be.in.file".equals(diagnostic.getCode())) {
            return true;
        }

        return false;
    }

    @Override
    public void report(Diagnostic diagnostic) {
        Locale locale = context.locale;

        if (diagnostic.getKind() == Kind.ERROR) {
            if (!ignoreError(diagnostic)) {
                reportJavaError(diagnostic, locale);
            } else {
                return;
            }
        }
        switch (diagnostic.getKind()) {
        case ERROR:
            logger.error(diagnostic);
            break;
        case WARNING:
        case MANDATORY_WARNING:
            logger.debug(diagnostic);
            break;
        case NOTE:
        case OTHER:
        default:
            logger.trace(diagnostic);
            break;
        }
    }

}