Log.java revision 2593:035b01d356ee 
1/*
2 * Copyright (c) 2012, 2014, 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
26package com.sun.tools.sjavac;
27
28import 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 risk.
36 *  This code and its internal interfaces are subject to change or
37 *  deletion without notice.</b>
38 */
39public 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 initializeLog(PrintStream o, PrintStream e) {
75        out = o;
76        err = e;
77    }
78
79    static public void setLogLevel(String l) {
80        switch (l) {
81            case "warn": level = WARN; break;
82            case "info": level = INFO; break;
83            case "debug": level = DEBUG; break;
84            case "trace": level = TRACE; break;
85            default:
86                throw new IllegalArgumentException("No such log level \"" + l + "\"");
87        }
88    }
89
90    static public boolean isTracing() {
91        return level >= TRACE;
92    }
93
94    static public boolean isDebugging() {
95        return level >= DEBUG;
96    }
97}
98