| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed 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 com.google.gwt.dev.util; |
| |
| import java.io.Serializable; |
| import java.util.Comparator; |
| |
| /** |
| * Performs a case-sensitive comparison of char arrays. |
| */ |
| public class CharArrayComparator implements Comparator<char[]>, Serializable { |
| |
| public static final CharArrayComparator INSTANCE = new CharArrayComparator(); |
| |
| public int compare(char[] a, char[] b) { |
| int ai = 0; |
| int bi = 0; |
| |
| for (; ai < a.length && bi < b.length; ++ai, ++bi) { |
| int c = a[ai] - b[bi]; |
| if (c != 0) { |
| return c; |
| } |
| } |
| |
| if (ai == a.length && bi < b.length) { |
| // a is shorter |
| return -1; |
| } |
| |
| if (ai < a.length && bi == b.length) { |
| // b is shorter |
| return 1; |
| } |
| |
| // they are equal |
| // |
| return 0; |
| } |
| |
| } |