/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, 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.util;
  
  import ch.qos.logback.core.CoreConstants;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Utility class for analysing logger names.
   */
  public class LoggerNameUtil {
  
      public static int getFirstSeparatorIndexOf(String name) {
          return getSeparatorIndexOf(name, 0);
      }
  
      /**
       * Get the position of the separator character, if any, starting at position
       * 'fromIndex'.
       *
       * @param name
       * @param fromIndex
       * @return
       */
      public static int getSeparatorIndexOf(String name, int fromIndex) {
          int dotIndex = name.indexOf(CoreConstants.DOT, fromIndex);
          int dollarIndex = name.indexOf(CoreConstants.DOLLAR, fromIndex);
  
          if (dotIndex == -1 && dollarIndex == -1)
              return -1;
          if (dotIndex == -1)
              return dollarIndex;
          if (dollarIndex == -1)
              return dotIndex;
  
          return dotIndex < dollarIndex ? dotIndex : dollarIndex;
      }
  
      public static List<String> computeNameParts(String loggerName) {
          List<String> partList = new ArrayList<String>();
  
          int fromIndex = 0;
          while (true) {
              int index = getSeparatorIndexOf(loggerName, fromIndex);
              if (index == -1) {
                  partList.add(loggerName.substring(fromIndex));
                  break;
              }
              partList.add(loggerName.substring(fromIndex, index));
              fromIndex = index + 1;
          }
          return partList;
      }
  }