/*

 * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package com.sun.tools.javac.util;

import java.util.HashMap;

import java.util.Map;

import javax.tools.JavaFileObject;

import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;

import com.sun.tools.javac.util.JCDiagnostic.SimpleDiagnosticPosition;

/**

 *  A base class for error logs. Reports errors and warnings, and

 *  keeps track of error numbers and positions.

 *

 *  This code and its internal interfaces are subject to change or

 *  deletion without notice.</b>

 */

public abstract class AbstractLog {

    AbstractLog(JCDiagnostic.Factory diags) {

        this.diags = diags;

        sourceMap = new HashMap<JavaFileObject, DiagnosticSource>();

    }

    /** Re-assign source, returning previous setting.

     */

    public JavaFileObject useSource(JavaFileObject file) {

        JavaFileObject prev = (source == null ? null : source.getFile());

        source = getSource(file);

        return prev;

    }

    protected DiagnosticSource getSource(JavaFileObject file) {

        if (file == null)

            return DiagnosticSource.NO_SOURCE;

        DiagnosticSource s = sourceMap.get(file);

        if (s == null) {

            s = new DiagnosticSource(file, this);

            sourceMap.put(file, s);

        }

        return s;

    }

    /** Return the underlying diagnostic source

     */

    public DiagnosticSource currentSource() {

        return source;

    }

    /** Report an error, unless another error was already reported at same

     *  source position.

     *  @param key    The key for the localized error message.

     *  @param args   Fields of the error message.

     */

    public void error(String key, Object ... args) {

        report(diags.error(source, null, key, args));

    }

    /** Report an error, unless another error was already reported at same

     *  source position.

     *  @param pos    The source position at which to report the error.

     *  @param key    The key for the localized error message.

     *  @param args   Fields of the error message.

     */

    public void error(DiagnosticPosition pos, String key, Object ... args) {

        report(diags.error(source, pos, key, args));

    }

    /** Report an error, unless another error was already reported at same

     *  source position.

     *  @param pos    The source position at which to report the error.

     *  @param key    The key for the localized error message.

     *  @param args   Fields of the error message.

     */

    public void error(int pos, String key, Object ... args) {

        report(diags.error(source, wrap(pos), key, args));

    }

    /** Report a warning, unless suppressed by the  -nowarn option or the

     *  maximum number of warnings has been reached.

     *  @param pos    The source position at which to report the warning.

     *  @param key    The key for the localized warning message.

     *  @param args   Fields of the warning message.

     */

    public void warning(String key, Object ... args) {

        report(diags.warning(source, null, key, args));

    }

    /** Report a warning, unless suppressed by the  -nowarn option or the

     *  maximum number of warnings has been reached.

     *  @param pos    The source position at which to report the warning.

     *  @param key    The key for the localized warning message.

     *  @param args   Fields of the warning message.

     */

    public void warning(DiagnosticPosition pos, String key, Object ... args) {

        report(diags.warning(source, pos, key, args));

    }

    /** Report a warning, unless suppressed by the  -nowarn option or the

     *  maximum number of warnings has been reached.

     *  @param pos    The source position at which to report the warning.

     *  @param key    The key for the localized warning message.

     *  @param args   Fields of the warning message.

     */

    public void warning(int pos, String key, Object ... args) {

        report(diags.warning(source, wrap(pos), key, args));

    }

    /** Report a warning.

     *  @param pos    The source position at which to report the warning.

     *  @param key    The key for the localized warning message.

     *  @param args   Fields of the warning message.

     */

    public void mandatoryWarning(DiagnosticPosition pos, String key, Object ... args) {

        report(diags.mandatoryWarning(source, pos, key, args));

    }

    /** Provide a non-fatal notification, unless suppressed by the -nowarn option.

     *  @param key    The key for the localized notification message.

     *  @param args   Fields of the notint an error or warning message:

     */

    public void note(String key, Object ... args) {

        report(diags.note(source, null, key, args));

    }

    /** Provide a non-fatal notification, unless suppressed by the -nowarn option.

     *  @param key    The key for the localized notification message.

     *  @param args   Fields of the notification message.

     */

    public void note(DiagnosticPosition pos, String key, Object ... args) {

        report(diags.note(source, pos, key, args));

    }

    /** Provide a non-fatal notification, unless suppressed by the -nowarn option.

     *  @param key    The key for the localized notification message.

     *  @param args   Fields of the notification message.

     */

    public void note(int pos, String key, Object ... args) {

        report(diags.note(source, wrap(pos), key, args));

    }

    /** Provide a non-fatal notification, unless suppressed by the -nowarn option.

     *  @param key    The key for the localized notification message.

     *  @param args   Fields of the notification message.

     */

    public void note(JavaFileObject file, String key, Object ... args) {

        report(diags.note(getSource(file), null, key, args));

    }

    /** Provide a non-fatal notification, unless suppressed by the -nowarn option.

     *  @param key    The key for the localized notification message.

     *  @param args   Fields of the notification message.

     */

    public void mandatoryNote(final JavaFileObject file, String key, Object ... args) {

        report(diags.mandatoryNote(getSource(file), key, args));

    }

    protected abstract void report(JCDiagnostic diagnostic);

    protected abstract void directError(String key, Object... args);

    private DiagnosticPosition wrap(int pos) {

        return (pos == Position.NOPOS ? null : new SimpleDiagnosticPosition(pos));

    }

    /** Factory for diagnostics

     */

    protected JCDiagnostic.Factory diags;

    /** The file that's currently being translated.

     */

    protected DiagnosticSource source;

    /** A cache of lightweight DiagnosticSource objects.

     */

    protected Map<JavaFileObject, DiagnosticSource> sourceMap;

}