| /* |
| * 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.appender.rolling; |
| |
| import java.text.NumberFormat; |
| import java.text.ParseException; |
| import java.util.Locale; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.status.StatusLogger; |
| |
| /** |
| * FileSize utility class. |
| */ |
| public final class FileSize { |
| private static final Logger LOGGER = StatusLogger.getLogger(); |
| |
| private static final long KB = 1024; |
| private static final long MB = KB * KB; |
| private static final long GB = KB * MB; |
| |
| /** |
| * Pattern for string parsing. |
| */ |
| private static final Pattern VALUE_PATTERN = |
| Pattern.compile("([0-9]+([\\.,][0-9]+)?)\\s*(|K|M|G)B?", Pattern.CASE_INSENSITIVE); |
| |
| private FileSize() { |
| } |
| |
| /** |
| * Converts a string to a number of bytes. Strings consist of a floating point value followed by |
| * K, M, or G for kilobytes, megabytes, gigabytes, respectively. The |
| * abbreviations KB, MB, and GB are also accepted. Matching is case insensitive. |
| * |
| * @param string The string to convert |
| * @param defaultValue The default value if a problem is detected parsing. |
| * @return The Bytes value for the string |
| */ |
| public static long parse(final String string, final long defaultValue) { |
| final Matcher matcher = VALUE_PATTERN.matcher(string); |
| |
| // Valid input? |
| if (matcher.matches()) { |
| try { |
| // Get double precision value |
| final long value = NumberFormat.getNumberInstance(Locale.ROOT).parse( |
| matcher.group(1)).longValue(); |
| |
| // Get units specified |
| final String units = matcher.group(3); |
| |
| if (units.isEmpty()) { |
| return value; |
| } else if (units.equalsIgnoreCase("K")) { |
| return value * KB; |
| } else if (units.equalsIgnoreCase("M")) { |
| return value * MB; |
| } else if (units.equalsIgnoreCase("G")) { |
| return value * GB; |
| } else { |
| LOGGER.error("FileSize units not recognized: " + string); |
| return defaultValue; |
| } |
| } catch (final ParseException e) { |
| LOGGER.error("FileSize unable to parse numeric part: " + string, e); |
| return defaultValue; |
| } |
| } |
| LOGGER.error("FileSize unable to parse bytes: " + string); |
| return defaultValue; |
| } |
| |
| } |