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8 package org.xwt.util;
9 import org.xwt.js.*;
10 import java.io.*;
11 import java.util.*;
12
13
14 public class Log {
15
16 public static boolean on = true;
17 public static boolean color = false;
18 public static boolean verbose = false;
19 public static boolean logDates = false;
20 public static Date lastDate = null;
21
22
23 public static boolean firstMessage = true;
24
25
26 public static synchronized void echo(Object o, Object message) { log(o, message, ECHO); }
27 public static synchronized void diag(Object o, Object message) { log(o, message, DIAGNOSTIC); }
28 public static synchronized void debug(Object o, Object message) { log(o, message, DEBUG); }
29 public static synchronized void info(Object o, Object message) { log(o, message, INFO); }
30 public static synchronized void warn(Object o, Object message) { log(o, message, WARN); }
31 public static synchronized void error(Object o, Object message) { log(o, message, ERROR); }
32
33
34 private static final int DIAGNOSTIC = -2;
35 private static final int ECHO = -1;
36
37
38 private static final int DEBUG = 0;
39 private static final int INFO = 1;
40 private static final int WARN = 2;
41 private static final int ERROR = 3;
42
43 private static final int BLACK = 30;
44 private static final int BLUE = 34;
45 private static final int GREEN = 32;
46 private static final int CYAN = 36;
47 private static final int RED = 31;
48 private static final int PURPLE = 35;
49 private static final int BROWN = 33;
50 private static final int GRAY = 37;
51
52 private static String colorize(int color, boolean bright, String s) {
53 if (!Log.color) return s;
54 return
55 "\033[40;" + (bright?"1;":"") + color + "m" +
56 s +
57 "\033[0m";
58 }
59
60 private static String lastClassName = null;
61 private static synchronized void log(Object o, Object message, int level) {
62 if (firstMessage && !logDates) {
63 firstMessage = false;
64 System.err.println(colorize(GREEN, false, "==========================================================================="));
65 diag(Log.class, "Logging enabled at " + new java.util.Date());
66 if (color) diag(Log.class, "logging messages in " +
67 colorize(BLUE, true, "c") +
68 colorize(RED, true, "o") +
69 colorize(CYAN, true, "l") +
70 colorize(GREEN, true, "o") +
71 colorize(PURPLE, true, "r"));
72 }
73
74 String classname;
75 if (o instanceof Class) classname = ((Class)o).getName();
76 else if (o instanceof String) classname = (String)o;
77 else classname = o.getClass().getName();
78
79 if (classname.equals(lastClassName)) classname = "";
80 else lastClassName = classname;
81
82 if (classname.indexOf('.') != -1) classname = classname.substring(classname.lastIndexOf('.') + 1);
83 if (classname.length() > (logDates ? 14 : 20)) classname = classname.substring(0, (logDates ? 14 : 20));
84 while (classname.length() < (logDates ? 14 : 20)) classname = " " + classname;
85 classname = classname + (classname.trim().length() == 0 ? " " : ": ");
86 classname = colorize(GRAY, true, classname);
87 classname = classname.replace('$', '.');
88
89 if (logDates) {
90 Date d = new Date();
91 if (lastDate == null || d.getYear() != lastDate.getYear() || d.getMonth() != lastDate.getMonth() || d.getDay() != lastDate.getDay()) {
92 String now = new java.text.SimpleDateFormat("EEE dd MMM yyyy").format(d);
93 System.err.println();
94 System.err.println(colorize(GRAY, false, "=== " + now + " =========================================================="));
95 }
96 java.text.DateFormat df = new java.text.SimpleDateFormat("[EEE HH:mm:ss] ");
97 classname = df.format(d) + classname;
98 lastDate = d;
99 }
100
101
102 if (message instanceof Throwable) {
103 if (level < ERROR) level = WARN;
104 ByteArrayOutputStream baos = new ByteArrayOutputStream();
105 ((Throwable)message).printStackTrace(new PrintStream(baos));
106 byte[] b = baos.toByteArray();
107 BufferedReader br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(b)));
108 String s = null;
109 try {
110 String m = "";
111 while((s = br.readLine()) != null) m += s + "\n";
112 log(o, m.substring(0, m.length() - 1), level);
113 } catch (IOException e) {
114 System.err.println(colorize(RED, true, "Logger: exception thrown by ByteArrayInputStream -- this should not happen"));
115 }
116 return;
117 }
118
119 String str = message.toString();
120 while(str.indexOf('\t') != -1)
121 str = str.substring(0, str.indexOf('\t')) + " " + str.substring(str.indexOf('\t') + 1);
122
123 classname = colorize(GRAY, false, classname);
124 int levelcolor = GRAY;
125 boolean bright = true;
126 switch (level) {
127 case DIAGNOSTIC: levelcolor = GREEN; bright = false; break;
128 case ECHO: levelcolor = BLUE; bright = true; break;
129 case DEBUG: levelcolor = BLACK; bright = true; break;
130 case INFO: levelcolor = GRAY; bright = false; break;
131 case WARN: levelcolor = BROWN; bright = false; break;
132 case ERROR: levelcolor = RED; bright = true; break;
133 }
134
135 while(str.indexOf('\n') != -1) {
136 System.err.println(classname + colorize(levelcolor, bright, str.substring(0, str.indexOf('\n'))));
137 classname = logDates ? " " : " ";
138 classname = colorize(GRAY,false,classname);
139 str = str.substring(str.indexOf('\n') + 1);
140 }
141 System.err.println(classname + colorize(levelcolor, bright, str));
142 }
143
144 public static void recursiveLog(String indent, String name, Object o) throws JSExn {
145 if (!name.equals("")) name += " : ";
146
147 if (o == null) {
148 JS.log(indent + name + "<null>");
149
150 } else if (o instanceof JSArray) {
151 JS.log(indent + name + "<array>");
152 JSArray na = (JSArray)o;
153 for(int i=0; i<na.length(); i++)
154 recursiveLog(indent + " ", i + "", na.elementAt(i));
155
156 } else if (o instanceof JS) {
157 JS.log(indent + name + "<object>");
158 JS s = (JS)o;
159 Enumeration e = s.keys();
160 while(e.hasMoreElements()) {
161 Object key = e.nextElement();
162 if (key != null)
163 recursiveLog(indent + " ", key.toString(),
164 (key instanceof Integer) ?
165 s.get(((Integer)key)) : s.get(key.toString()));
166 }
167 } else {
168 JS.log(indent + name + o);
169
170 }
171 }
172
173 }
174