/**
 * 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.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;
  }
}
