content: /**
   * 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.activemq.util;
  
  import java.io.File;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * Converts string values like "20 Mb", "1024kb", and "1g" to long or int values in bytes.
   */
  public final class XBeanByteConverterUtil {
  
      private static final Pattern[] BYTE_MATCHERS = new Pattern[] {
              Pattern.compile("^\\s*(\\d+)\\s*(b)?\\s*$", Pattern.CASE_INSENSITIVE),
              Pattern.compile("^\\s*(\\d+)\\s*k(b)?\\s*$", Pattern.CASE_INSENSITIVE),
              Pattern.compile("^\\s*(\\d+)\\s*m(b)?\\s*$", Pattern.CASE_INSENSITIVE),
              Pattern.compile("^\\s*(\\d+)\\s*g(b)?\\s*$", Pattern.CASE_INSENSITIVE)};
  
      private XBeanByteConverterUtil() {
          // complete
      }
  
      public static Long convertToLongBytes(String str) throws IllegalArgumentException {
          for (int i = 0; i < BYTE_MATCHERS.length; i++) {
              Matcher matcher = BYTE_MATCHERS[i].matcher(str);
              if (matcher.matches()) {
                  long value = Long.parseLong(matcher.group(1));
                  for (int j = 1; j <= i; j++) {
                      value *= 1024;
                  }
                  return Long.valueOf(value);
              }
          }
          throw new IllegalArgumentException("Could not convert to a memory size: " + str);
      }
  
      public static Integer convertToIntegerBytes(String str) throws IllegalArgumentException {
          for (int i = 0; i < BYTE_MATCHERS.length; i++) {
              Matcher matcher = BYTE_MATCHERS[i].matcher(str);
              if (matcher.matches()) {
                  int value = Integer.parseInt(matcher.group(1));
                  for (int j = 1; j <= i; j++) {
                      value *= 1024;
                  }
                  return Integer.valueOf(value);
              }
          }
          throw new IllegalArgumentException("Could not convert to a memory size: " + str);
      }
      
  }
  