/**
    * 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.core.rolling.helper;
  
  import ch.qos.logback.core.pattern.DynamicConverter;
  import ch.qos.logback.core.pattern.FormatInfo;
  
  /**
   * When asked to convert an integer, <code>IntegerTokenConverter</code> the
   * string value of that integer.
   * 
   * @author Ceki Gulcu
   */
  public class IntegerTokenConverter extends DynamicConverter<Object> implements MonoTypedConverter {
  
      public final static String CONVERTER_KEY = "i";
  
      public String convert(int i) {
          String s = Integer.toString(i);
          FormatInfo formattingInfo = getFormattingInfo();
          if (formattingInfo == null) {
              return s;
          }
          int min = formattingInfo.getMin();
          StringBuilder sbuf = new StringBuilder();
          for (int j = s.length(); j < min; ++j) {
              sbuf.append('0');
          }
          return sbuf.append(s).toString();
      }
  
      public String convert(Object o) {
          if (o == null) {
              throw new IllegalArgumentException("Null argument forbidden");
          }
          if (o instanceof Integer) {
              Integer i = (Integer) o;
              return convert(i.intValue());
          }
          throw new IllegalArgumentException("Cannot convert " + o + " of type" + o.getClass().getName());
      }
  
      public boolean isApplicable(Object o) {
          return (o instanceof Integer);
      }
  }