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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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124 public int intLevel() {
125 return this.intLevel;
126 }
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133 public StandardLevel getStandardLevel() {
134 return standardLevel;
135 }
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145 public boolean isLessSpecificThan(final Level level) {
146 return this.intLevel >= level.intLevel;
147 }
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157 public boolean isMoreSpecificThan(final Level level) {
158 return this.intLevel <= level.intLevel;
159 }
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161 @Override
162 @SuppressWarnings("CloneDoesntCallSuperClone")
163 public Level clone() throws CloneNotSupportedException {
164 throw new CloneNotSupportedException();
165 }
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167 @Override
168 public int compareTo(final Level other) {
169 return intLevel < other.intLevel ? -1 : (intLevel > other.intLevel ? 1 : 0);
170 }
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172 @Override
173 public boolean equals(final Object other) {
174 return other instanceof Level && other == this;
175 }
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177 public Class<Level> getDeclaringClass() {
178 return Level.class;
179 }
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181 @Override
182 public int hashCode() {
183 return this.name.hashCode();
184 }
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191 public String name() {
192 return this.name;
193 }
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195 @Override
196 public String toString() {
197 return this.name;
198 }
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207 public static Level forName(final String name, final int intValue) {
208 final Level level = levels.get(name);
209 if (level != null) {
210 return level;
211 }
212 try {
213 return new Level(name, intValue);
214 } catch (final IllegalStateException ex) {
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216 return levels.get(name);
217 }
218 }
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225 public static Level getLevel(final String name) {
226 return levels.get(name);
227 }
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236 public static Level toLevel(final String sArg) {
237 return toLevel(sArg, Level.DEBUG);
238 }
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249 public static Level toLevel(final String name, final Level defaultLevel) {
250 if (name == null) {
251 return defaultLevel;
252 }
253 final Level level = levels.get(name.toUpperCase(Locale.ENGLISH));
254 return level == null ? defaultLevel : level;
255 }
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261 public static Level[] values() {
262 final Collection<Level> values = Level.levels.values();
263 return values.toArray(new Level[values.size()]);
264 }
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273 public static Level valueOf(final String name) {
274 if (name == null) {
275 throw new NullPointerException("No level name given.");
276 }
277 final String levelName = name.toUpperCase();
278 if (levels.containsKey(levelName)) {
279 return levels.get(levelName);
280 }
281 throw new IllegalArgumentException("Unknown level constant [" + levelName + "].");
282 }
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297 public static <T extends Enum<T>> T valueOf(final Class<T> enumType, final String name) {
298 return Enum.valueOf(enumType, name);
299 }
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302 protected Object readResolve() {
303 return Level.valueOf(this.name);
304 }
305 }
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