util/src/com/intellij/util/text/ReverseCharSequence.java

   1 package com.intellij.util.text;
   2
   3 /**
   4  * @author cdr
   5  */
   6 public class ReverseCharSequence implements CharSequence{
   7   private final CharSequence mySequence;
   8
   9   public ReverseCharSequence(CharSequence sequence) {
  10     mySequence = sequence;
  11   }
  12
  13   public int length() {
  14     return mySequence.length();
  15   }
  16
  17   public char charAt(int index) {
  18     return mySequence.charAt(mySequence.length()-index-1);
  19   }
  20
  21   public CharSequence subSequence(int start, int end) {
  22     return new ReverseCharSequence(mySequence.subSequence(start, end));
  23   }
  24 }