/*

 * Copyright (c) 2012, 2013, 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

 * questions.

 */

package com.sun.tools.sjavac;

import java.io.PrintStream;

/**

 * Utility class only for sjavac logging.

 * The log level can be set using for example --log=DEBUG on the sjavac command line.

 *

 * <p><b>This is NOT part of any supported API.

 * If you write code that depends on this, you do so at your own

 * risk.  This code and its internal interfaces are subject to change

 * or deletion without notice.</b></p>

 */

public class Log {

    private static PrintStream out, err;

    public final static int WARN = 1;

    public final static int INFO = 2;

    public final static int DEBUG = 3;

    public final static int TRACE = 4;

    private static int level = WARN;

    static public void trace(String msg) {

        if (level >= TRACE) {

            out.println(msg);

        }

    }

    static public void debug(String msg) {

        if (level >= DEBUG) {

            out.println(msg);

        }

    }

    static public void info(String msg) {

        if (level >= INFO) {

            out.println(msg);

        }

    }

    static public void warn(String msg) {

        err.println(msg);

    }

    static public void error(String msg) {

        err.println(msg);

    }

    static public void setLogLevel(String l, PrintStream o, PrintStream e)

        throws ProblemException {

        out = o;

        err = e;

        switch (l) {

            case "warn": level = WARN; break;

            case "info": level = INFO; break;

            case "debug": level = DEBUG; break;

            case "trace": level = TRACE; break;

            default:

                throw new ProblemException("No such log level \"" + l + "\"");

        }

    }

    static public boolean isTracing() {

        return level >= TRACE;

    }

    static public boolean isDebugging() {

        return level >= DEBUG;

    }

}