1 /*

     2  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

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

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

    25 

    26 package com.sun.tools.sjavac;

    27 

    28 import java.io.PrintStream;

    29 

    30 /**

    31  * Utility class only for sjavac logging.

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

    33  *

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

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

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

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

    38  */

    39 public class Log {

    40     private static PrintStream out, err;

    41 

    42     public final static int WARN = 1;

    43     public final static int INFO = 2;

    44     public final static int DEBUG = 3;

    45     public final static int TRACE = 4;

    46     private static int level = WARN;

    47 

    48     static public void trace(String msg) {

    49         if (level >= TRACE) {

    50             out.println(msg);

    51         }

    52     }

    53 

    54     static public void debug(String msg) {

    55         if (level >= DEBUG) {

    56             out.println(msg);

    57         }

    58     }

    59 

    60     static public void info(String msg) {

    61         if (level >= INFO) {

    62             out.println(msg);

    63         }

    64     }

    65 

    66     static public void warn(String msg) {

    67         err.println(msg);

    68     }

    69 

    70     static public void error(String msg) {

    71         err.println(msg);

    72     }

    73 

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

    75         throws ProblemException {

    76         out = o;

    77         err = e;

    78         if (l.equals("warn")) level = WARN;

    79         else if (l.equals("info")) level = INFO;

    80         else if (l.equals("debug")) level = DEBUG;

    81         else if (l.equals("trace")) level = TRACE;

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

    83     }

    84 

    85     static public boolean isTracing() {

    86         return level >= TRACE;

    87     }

    88 

    89     static public boolean isDebugging() {

    90         return level >= DEBUG;

    91     }

    92 }