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30
31 package jbet;
32 import java.io.*;
33 import java.util.*;
34 import java.lang.reflect.Field  ;
35
36
45
46 public class Logger {
47
48 static final int ALL = 0;
50 static final int DEBUG = 10;
52 static final int INFO = 20;
53 static final int WARN = 30;
54 static final int ERROR = 40;
55 static final int FATAL = 50;
56
57 public static int str2level(String s) {
58 if (s.equalsIgnoreCase("all"))
59 return ALL;
60 if (s.equalsIgnoreCase("debug"))
61 return DEBUG;
62 if (s.equalsIgnoreCase("info"))
63 return INFO;
64 if (s.equalsIgnoreCase("warn"))
65 return WARN;
66 if (s.equalsIgnoreCase("error"))
67 return ERROR;
68 if (s.equalsIgnoreCase("fatal"))
69 return FATAL;
70 return -1;
71 }
72
73 public static String level2str (int s)
74 {
75 if (s >= FATAL)
76 return "fatal";
77 else if (s >= ERROR)
78 return "error";
79 else if (s >= WARN)
80 return "warn";
81 else if (s >= INFO)
82 return "info";
83 else if (s >= DEBUG)
84 return "debug";
85 else
86 return "all";
87 }
88
89 PrintStream out; int loglevel; HashSet facilities;
93
95
99 Logger(PrintStream out, int level) {
100 this.out = out;
101 loglevel = level;
102 facilities = new HashSet();
103 }
104
105
109 public void setLevel(int l) {
110 loglevel = l;
111 }
112
113 public void addFacility (String f) {
114 facilities.add (f);
115 }
116
117
121 public void setOut(PrintStream out) {
122 this.out = out;
123 }
124
125 public void outline(String s, int lev, String facility, String cmd) {
126 if (filter (lev, facility)) {
127 StringBuffer sb = new StringBuffer ();
128
129 if (cmd != null) {
130 sb.append (cmd);
131 sb.append (":");
132 }
133 if (facility != null) {
134 sb.append (facility);
135 sb.append (":");
136 }
137 sb.append (" ");
138 sb.append (s);
139 out.println(sb.toString());
140 }
141 }
142
143 static String class2facil(String cname) {
144
145 Class cr;
146 try {
147 cr = Class.forName (cname);
148 Field f = cr.getField ("JbetLogFacility");
149 return f.get (null).toString();
150 }
151 catch (Exception e) {
152
153 int i = cname.indexOf("$");
154 if (i != -1)
155 return class2facil (cname.substring(0,i));
156 else
157 return null;
158 }
159 }
160
161 static String getfacil() {
162 StackTraceElement [] st = new Exception ().getStackTrace();
163 String cname;
164 for (int i = 0; i < st.length; i++) {
165 cname = st[i].getClassName();
166 if (!cname.equals("jbet.Logger") &&
167 !cname.startsWith("jbet.Logger$") &&
168 !cname.startsWith("java.") &&
169 !cname.equals("jbet.LineWriter") &&
170 !cname.startsWith("jbet.LineWriter$")) {
171
172 String fac = class2facil (cname);
173 if (fac != null)
174 return fac;
175 }
176 }
177 return null;
178 }
179
180 static String getcmd() {
181 StackTraceElement [] st = new Exception ().getStackTrace();
182 String cname;
183
184 for (int i = 0; i < st.length; i++) {
185 cname = st[i].getClassName();
186
187 Class cr;
188
189 try {
190 cr = Class.forName (cname);
191 } catch (Exception e) {
192 continue;
193 }
194 if (Command.class.isAssignableFrom (cr)) {
195 if (cname.startsWith ("jbet.cmd.")) {
196 i = cname.indexOf("$", 9);
197 if (i != -1)
198 return cname.substring(9,i-9);
199 else
200 return cname.substring (9);
201 }
202 else
203 return cname;
204 }
205 }
206
207 return "<none>";
208 }
209
210 public LineWriter getStream(final int level) {
211 return new LineWriter() {
212 String currfacility;
213 String currcmd;
214
215 protected void doflush() {}
216 protected void doclose() {}
217 protected void outline(String s) {
218 Logger.this.outline(s,level,currfacility,currcmd);
219 }
220 protected void dowrite(char[]buf, int off, int len) {
221 if (startofline) {
222 currfacility = Logger.getfacil();
223 currcmd = Logger.getcmd();
224 }
225
226 super.dowrite(buf, off, len);
227 }
228 };
229 }
230
231 private boolean filter(int level, String fac) {
232 return level >= loglevel || facilities.contains (fac);
233 }
234 }
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