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17 package org.apache.logging.log4j;
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19 import java.io.Serializable;
20 import java.util.Collection;
21 import java.util.Locale;
22 import java.util.concurrent.ConcurrentHashMap;
23 import java.util.concurrent.ConcurrentMap;
24
25 import org.apache.logging.log4j.spi.StandardLevel;
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44 public final class Level implements Comparable<Level>, Serializable {
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46 private static final long serialVersionUID = 1581082L;
47 private static final ConcurrentMap<String, Level> levels = new ConcurrentHashMap<String, Level>();
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52 public static final Level OFF;
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57 public static final Level FATAL;
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62 public static final Level ERROR;
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67 public static final Level WARN;
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72 public static final Level INFO;
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77 public static final Level DEBUG;
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82 public static final Level TRACE;
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87 public static final Level ALL;
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89 static {
90 OFF = new Level("OFF", StandardLevel.OFF.intLevel());
91 FATAL = new Level("FATAL", StandardLevel.FATAL.intLevel());
92 ERROR = new Level("ERROR", StandardLevel.ERROR.intLevel());
93 WARN = new Level("WARN", StandardLevel.WARN.intLevel());
94 INFO = new Level("INFO", StandardLevel.INFO.intLevel());
95 DEBUG = new Level("DEBUG", StandardLevel.DEBUG.intLevel());
96 TRACE = new Level("TRACE", StandardLevel.TRACE.intLevel());
97 ALL = new Level("ALL", StandardLevel.ALL.intLevel());
98 }
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100 private final String name;
101 private final int intLevel;
102 private final StandardLevel standardLevel;
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104 private Level(final String name, final int intLevel) {
105 if (name == null || name.isEmpty()) {
106 throw new IllegalArgumentException("Illegal null Level constant");
107 }
108 if (intLevel < 0) {
109 throw new IllegalArgumentException("Illegal Level int less than zero.");
110 }
111 this.name = name;
112 this.intLevel = intLevel;
113 this.standardLevel = StandardLevel.getStandardLevel(intLevel);
114 if (levels.putIfAbsent(name, this) != null) {
115 throw new IllegalStateException("Level " + name + " has already been defined.");
116 }
117 }
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119 public int intLevel() {
120 return this.intLevel;
121 }
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123 public StandardLevel getStandardLevel() {
124 return standardLevel;
125 }
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135 public boolean isLessSpecificThan(final Level level) {
136 return this.intLevel >= level.intLevel;
137 }
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147 public boolean isMoreSpecificThan(final Level level) {
148 return this.intLevel <= level.intLevel;
149 }
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151 @Override
152 @SuppressWarnings("CloneDoesntCallSuperClone")
153 public Level clone() throws CloneNotSupportedException {
154 throw new CloneNotSupportedException();
155 }
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157 @Override
158 public int compareTo(Level other) {
159 return intLevel < other.intLevel ? -1 : (intLevel > other.intLevel ? 1 : 0);
160 }
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162 @Override
163 public boolean equals(Object other) {
164 return other instanceof Level && other == this;
165 }
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167 public Class<Level> getDeclaringClass() {
168 return Level.class;
169 }
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171 @Override
172 public int hashCode() {
173 return this.name.hashCode();
174 }
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177 public String name() {
178 return this.name;
179 }
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181 @Override
182 public String toString() {
183 return this.name;
184 }
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193 public static Level forName(final String name, final int intValue) {
194 Level level = levels.get(name);
195 if (level != null) {
196 return level;
197 }
198 try {
199 return new Level(name, intValue);
200 } catch (IllegalStateException ex) {
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202 return levels.get(name);
203 }
204 }
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211 public static Level getLevel(final String name) {
212 return levels.get(name);
213 }
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222 public static Level toLevel(final String sArg) {
223 return toLevel(sArg, Level.DEBUG);
224 }
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235 public static Level toLevel(final String name, final Level defaultLevel) {
236 if (name == null) {
237 return defaultLevel;
238 }
239 Level level = levels.get(name.toUpperCase(Locale.ENGLISH));
240 return level == null ? defaultLevel : level;
241 }
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247 public static Level[] values() {
248 Collection<Level> values = Level.levels.values();
249 return values.toArray(new Level[values.size()]);
250 }
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259 public static Level valueOf(final String name) {
260 if (name == null) {
261 throw new NullPointerException("No level name given.");
262 }
263 final String levelName = name.toUpperCase();
264 if (levels.containsKey(levelName)) {
265 return levels.get(levelName);
266 }
267 throw new IllegalArgumentException("Unknown level constant [" + levelName + "].");
268 }
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270 public static <T extends Enum<T>> T valueOf(final Class<T> enumType, final String name) {
271 return Enum.valueOf(enumType, name);
272 }
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275 protected Object readResolve() {
276 return Level.valueOf(this.name);
277 }
278 }
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