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Advanced logging for Android apps
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2013, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic;
import org.slf4j.spi.LocationAwareLogger;
/**
* Defines the set of levels recognized by logback-classic, that is {@link #OFF},
* {@link #ERROR}, {@link #WARN}, {@link #INFO}, {@link #DEBUG},
* {@link #TRACE} and {@link #ALL}.
*/
public final class Level implements java.io.Serializable {
private static final long serialVersionUID = -814092767334282137L;
public static final int OFF_INT = Integer.MAX_VALUE;
public static final int ERROR_INT = 40000;
public static final int WARN_INT = 30000;
public static final int INFO_INT = 20000;
public static final int DEBUG_INT = 10000;
public static final int TRACE_INT = 5000;
public static final int ALL_INT = Integer.MIN_VALUE;
public static final Integer OFF_INTEGER = OFF_INT;
public static final Integer ERROR_INTEGER = ERROR_INT;
public static final Integer WARN_INTEGER = WARN_INT;
public static final Integer INFO_INTEGER = INFO_INT;
public static final Integer DEBUG_INTEGER = DEBUG_INT;
public static final Integer TRACE_INTEGER = TRACE_INT;
public static final Integer ALL_INTEGER = ALL_INT;
/**
* The OFF is used to turn off logging.
*/
public static final Level OFF = new Level(OFF_INT, "OFF");
/**
* The ERROR level designates error events which may or not
* be fatal to the application.
*/
public static final Level ERROR = new Level(ERROR_INT, "ERROR");
/**
* The WARN level designates potentially harmful situations.
*/
public static final Level WARN = new Level(WARN_INT, "WARN");
/**
* The INFO level designates informational messages
* highlighting overall progress of the application.
*/
public static final Level INFO = new Level(INFO_INT, "INFO");
/**
* The DEBUG level designates informational events of lower
* importance.
*/
public static final Level DEBUG = new Level(DEBUG_INT, "DEBUG");
/**
* The TRACE level designates informational events of very low
* importance.
*/
public static final Level TRACE = new Level(TRACE_INT, "TRACE");
/**
* The ALL is used to turn on all logging.
*/
public static final Level ALL = new Level(ALL_INT, "ALL");
public final int levelInt;
public final String levelStr;
/**
* Instantiate a Level object.
*/
private Level(int levelInt, String levelStr) {
this.levelInt = levelInt;
this.levelStr = levelStr;
}
/**
* Returns the string representation of this Level.
* @return the string value of this level
*/
public String toString() {
return levelStr;
}
/**
* Returns the integer representation of this Level.
* @return integer value of the level
*/
public int toInt() {
return levelInt;
}
/**
* Convert a Level to an Integer object.
*
* @return This level's Integer mapping.
*/
public Integer toInteger() {
switch (levelInt) {
case ALL_INT:
return ALL_INTEGER;
case TRACE_INT:
return TRACE_INTEGER;
case DEBUG_INT:
return DEBUG_INTEGER;
case INFO_INT:
return INFO_INTEGER;
case WARN_INT:
return WARN_INTEGER;
case ERROR_INT:
return ERROR_INTEGER;
case OFF_INT:
return OFF_INTEGER;
default:
throw new IllegalStateException("Level " + levelStr + ", " + levelInt
+ " is unknown.");
}
}
/**
* Returns true if this Level has a higher or equal Level than
* the Level passed as argument, false otherwise.
* @param r level to evaluate
*/
public boolean isGreaterOrEqual(Level r) {
return levelInt >= r.levelInt;
}
/**
* Convert the string passed as argument to a Level. If the conversion fails,
* then this method returns {@link #DEBUG}.
* @param sArg string to be converted
*/
public static Level toLevel(String sArg) {
return toLevel(sArg, Level.DEBUG);
}
/**
* This method exists in order to comply with Joran's valueOf convention.
*
* @param sArg string to be evaluated
* @return the corresponding level
*/
public static Level valueOf(String sArg) {
return toLevel(sArg, Level.DEBUG);
}
/**
* Convert an integer passed as argument to a Level. If the conversion fails,
* then this method returns {@link #DEBUG}.
* @param val integer to be evaluated
* @return the corresponding level
*/
public static Level toLevel(int val) {
return toLevel(val, Level.DEBUG);
}
/**
* Convert an integer passed as argument to a Level. If the conversion fails,
* then this method returns the specified default.
* @param val integer to be evaluated
* @param defaultLevel default level if val could not be converted
* @return the corresponding level
*/
public static Level toLevel(int val, Level defaultLevel) {
switch (val) {
case ALL_INT:
return ALL;
case TRACE_INT:
return TRACE;
case DEBUG_INT:
return DEBUG;
case INFO_INT:
return INFO;
case WARN_INT:
return WARN;
case ERROR_INT:
return ERROR;
case OFF_INT:
return OFF;
default:
return defaultLevel;
}
}
/**
* Convert the string passed as argument to a Level. If the conversion fails,
* then this method returns the value of defaultLevel.
* @param sArg string to be evaluated
* @param defaultLevel default level if sArg could not be converted
* @return the corresponding level
*/
public static Level toLevel(String sArg, Level defaultLevel) {
if (sArg == null) {
return defaultLevel;
}
if (sArg.equalsIgnoreCase("ALL")) {
return Level.ALL;
}
if (sArg.equalsIgnoreCase("TRACE")) {
return Level.TRACE;
}
if (sArg.equalsIgnoreCase("DEBUG")) {
return Level.DEBUG;
}
if (sArg.equalsIgnoreCase("INFO")) {
return Level.INFO;
}
if (sArg.equalsIgnoreCase("WARN")) {
return Level.WARN;
}
if (sArg.equalsIgnoreCase("ERROR")) {
return Level.ERROR;
}
if (sArg.equalsIgnoreCase("OFF")) {
return Level.OFF;
}
return defaultLevel;
}
/**
* Return the flyweight instance of the level received through serizalization,
* i.e. 'this'.
*
* @return The appropriate flyweight instance
*/
private Object readResolve() {
return toLevel(this.levelInt);
}
/**
* Convert one of the integer values defined in {@link LocationAwareLogger}
* interface to an instance of this class, i.e. a Level.
*
* @param levelInt An integer value representing a level as defined in LocationAwareLogger
* @return an instance of this class, i.e. a Level.
* @since 1.0.1
*/
public static Level fromLocationAwareLoggerInteger(int levelInt) {
Level level;
switch (levelInt) {
case LocationAwareLogger.TRACE_INT:
level = TRACE;
break;
case LocationAwareLogger.DEBUG_INT:
level = DEBUG;
break;
case LocationAwareLogger.INFO_INT:
level = INFO;
break;
case LocationAwareLogger.WARN_INT:
level = WARN;
break;
case LocationAwareLogger.ERROR_INT:
level = ERROR;
break;
default:
throw new IllegalArgumentException(levelInt + " not a valid level value");
}
return level;
}
/**
* Convert this level instance to an integer value defined in the
* {@link LocationAwareLogger} interface.
*
* @param level The level to convert to LocationAwareLogger integer
* @return int An integer corresponding to this level as defined in LocationAwareLogger
* @since 1.0.1
*/
public static int toLocationAwareLoggerInteger(Level level) {
if (level == null)
throw new IllegalArgumentException("null level parameter is not admitted");
switch (level.toInt()) {
case Level.TRACE_INT:
return LocationAwareLogger.TRACE_INT;
case Level.DEBUG_INT:
return LocationAwareLogger.DEBUG_INT;
case Level.INFO_INT:
return LocationAwareLogger.INFO_INT;
case Level.WARN_INT:
return LocationAwareLogger.WARN_INT;
case Level.ERROR_INT:
return LocationAwareLogger.ERROR_INT;
default:
throw new IllegalArgumentException(level + " not a valid level value");
}
}
}
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