| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache license, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the license for the specific language governing permissions and |
| * limitations under the license. |
| */ |
| package org.apache.logging.log4j.core.pattern; |
| |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| |
| import org.apache.logging.log4j.Level; |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.plugins.Plugin; |
| import org.apache.logging.log4j.core.util.Patterns; |
| import org.apache.logging.log4j.util.PerformanceSensitive; |
| |
| /** |
| * Returns the event's level in a StringBuilder. |
| */ |
| @Plugin(name = "LevelPatternConverter", category = PatternConverter.CATEGORY) |
| @ConverterKeys({ "p", "level" }) |
| @PerformanceSensitive("allocation") |
| public final class LevelPatternConverter extends LogEventPatternConverter { |
| private static final String OPTION_LENGTH = "length"; |
| private static final String OPTION_LOWER = "lowerCase"; |
| |
| /** |
| * Singleton. |
| */ |
| private static final LevelPatternConverter INSTANCE = new LevelPatternConverter(null); |
| |
| private final Map<Level, String> levelMap; |
| |
| /** |
| * Private constructor. |
| */ |
| private LevelPatternConverter(final Map<Level, String> map) { |
| super("Level", "level"); |
| this.levelMap = map; |
| } |
| |
| /** |
| * Obtains an instance of pattern converter. |
| * |
| * @param options |
| * options, may be null. May contain a list of level names and The value that should be displayed for the |
| * Level. |
| * @return instance of pattern converter. |
| */ |
| public static LevelPatternConverter newInstance(final String[] options) { |
| if (options == null || options.length == 0) { |
| return INSTANCE; |
| } |
| final Map<Level, String> levelMap = new HashMap<>(); |
| int length = Integer.MAX_VALUE; // More than the longest level name. |
| boolean lowerCase = false; |
| final String[] definitions = options[0].split(Patterns.COMMA_SEPARATOR); |
| for (final String def : definitions) { |
| final String[] pair = def.split("="); |
| if (pair == null || pair.length != 2) { |
| LOGGER.error("Invalid option {}", def); |
| continue; |
| } |
| final String key = pair[0].trim(); |
| final String value = pair[1].trim(); |
| if (OPTION_LENGTH.equalsIgnoreCase(key)) { |
| length = Integer.parseInt(value); |
| } else if (OPTION_LOWER.equalsIgnoreCase(key)) { |
| lowerCase = Boolean.parseBoolean(value); |
| } else { |
| final Level level = Level.toLevel(key, null); |
| if (level == null) { |
| LOGGER.error("Invalid Level {}", key); |
| } else { |
| levelMap.put(level, value); |
| } |
| } |
| } |
| if (levelMap.isEmpty() && length == Integer.MAX_VALUE && !lowerCase) { |
| return INSTANCE; |
| } |
| for (final Level level : Level.values()) { |
| if (!levelMap.containsKey(level)) { |
| final String left = left(level, length); |
| levelMap.put(level, lowerCase ? left.toLowerCase(Locale.US) : left); |
| } |
| } |
| return new LevelPatternConverter(levelMap); |
| } |
| |
| /** |
| * Returns the leftmost chars of the level name for the given level. |
| * |
| * @param level |
| * The level |
| * @param length |
| * How many chars to return |
| * @return The abbreviated level name, or the whole level name if the {@code length} is greater than the level name |
| * length, |
| */ |
| private static String left(final Level level, final int length) { |
| final String string = level.toString(); |
| if (length >= string.length()) { |
| return string; |
| } |
| return string.substring(0, length); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void format(final LogEvent event, final StringBuilder output) { |
| output.append(levelMap == null ? event.getLevel().toString() : levelMap.get(event.getLevel())); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String getStyleClass(final Object e) { |
| if (e instanceof LogEvent) { |
| return "level " + ((LogEvent) e).getLevel().name().toLowerCase(Locale.ENGLISH); |
| } |
| |
| return "level"; |
| } |
| } |