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18 package org.apache.log4j.config;
19
20 import org.apache.log4j.Appender;
21 import org.apache.log4j.Category;
22 import org.apache.log4j.Level;
23 import org.apache.log4j.LogManager;
24 import org.apache.log4j.Logger;
25
26 import java.io.PrintWriter;
27 import java.util.Enumeration;
28 import java.util.Hashtable;
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36
37 public class PropertyPrinter implements PropertyGetter.PropertyCallback {
38 protected int numAppenders = 0;
39 protected Hashtable appenderNames = new Hashtable();
40 protected Hashtable layoutNames = new Hashtable();
41 protected PrintWriter out;
42 protected boolean doCapitalize;
43
44 public
45 PropertyPrinter(PrintWriter out) {
46 this(out, false);
47 }
48
49 public
50 PropertyPrinter(PrintWriter out, boolean doCapitalize) {
51 this.out = out;
52 this.doCapitalize = doCapitalize;
53
54 print(out);
55 out.flush();
56 }
57
58 protected
59 String genAppName() {
60 return "A" + numAppenders++;
61 }
62
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65
66
67 protected
68 boolean isGenAppName(String name) {
69 if (name.length() < 2 || name.charAt(0) != 'A') return false;
70
71 for (int i = 0; i < name.length(); i++) {
72 if (name.charAt(i) < '0' || name.charAt(i) > '9') return false;
73 }
74 return true;
75 }
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81
82
83 public
84 void print(PrintWriter out) {
85 printOptions(out, Logger.getRootLogger());
86
87 Enumeration cats = LogManager.getCurrentLoggers();
88 while (cats.hasMoreElements()) {
89 printOptions(out, (Logger) cats.nextElement());
90 }
91 }
92
93
94
95
96 protected
97 void printOptions(PrintWriter out, Category cat) {
98 Enumeration appenders = cat.getAllAppenders();
99 Level prio = cat.getLevel();
100 String appenderString = (prio == null ? "" : prio.toString());
101
102 while (appenders.hasMoreElements()) {
103 Appender app = (Appender) appenders.nextElement();
104 String name;
105
106 if ((name = (String) appenderNames.get(app)) == null) {
107
108
109 if ((name = app.getName()) == null || isGenAppName(name)) {
110 name = genAppName();
111 }
112 appenderNames.put(app, name);
113
114 printOptions(out, app, "log4j.appender."+name);
115 if (app.getLayout() != null) {
116 printOptions(out, app.getLayout(), "log4j.appender."+name+".layout");
117 }
118 }
119 appenderString += ", " + name;
120 }
121 String catKey = (cat == Logger.getRootLogger())
122 ? "log4j.rootLogger"
123 : "log4j.logger." + cat.getName();
124 if (appenderString != "") {
125 out.println(catKey + "=" + appenderString);
126 }
127 if (!cat.getAdditivity() && cat != Logger.getRootLogger()) {
128 out.println("log4j.additivity." + cat.getName() + "=false");
129 }
130 }
131
132 protected void printOptions(PrintWriter out, Logger cat) {
133 printOptions(out, (Category) cat);
134 }
135
136 protected
137 void printOptions(PrintWriter out, Object obj, String fullname) {
138 out.println(fullname + "=" + obj.getClass().getName());
139 PropertyGetter.getProperties(obj, this, fullname + ".");
140 }
141
142 public void foundProperty(Object obj, String prefix, String name, Object value) {
143
144 if (obj instanceof Appender && "name".equals(name)) {
145 return;
146 }
147 if (doCapitalize) {
148 name = capitalize(name);
149 }
150 out.println(prefix + name + "=" + value.toString());
151 }
152
153 public static String capitalize(String name) {
154 if (Character.isLowerCase(name.charAt(0))) {
155 if (name.length() == 1 || Character.isLowerCase(name.charAt(1))) {
156 StringBuffer newname = new StringBuffer(name);
157 newname.setCharAt(0, Character.toUpperCase(name.charAt(0)));
158 return newname.toString();
159 }
160 }
161 return name;
162 }
163
164
165 public static void main(String[] args) {
166 new PropertyPrinter(new PrintWriter(System.out));
167 }
168 }