1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package java.util.regex; 18 19 /** 20 * Holds the results of a successful match of a regular expression against a 21 * given string. Only used internally, thus sparsely documented (though the 22 * defining public interface has full documentation). 23 * 24 * @see java.util.regex.MatchResult 25 */ 26 class MatchResultImpl implements MatchResult { 27 28 /** 29 * Holds the original input text. 30 */ 31 private String text; 32 33 /** 34 * Holds the offsets of the groups in the input text. The first two 35 * elements specifiy start and end of the zero group, the next two specify 36 * group 1, and so on. 37 */ 38 private int[] offsets; 39 40 MatchResultImpl(String text, int[] offsets) { 41 this.text = text; 42 this.offsets = offsets.clone(); 43 } 44 45 public int end() { 46 return end(0); 47 } 48 49 public int end(int group) { 50 return offsets[2 * group + 1]; 51 } 52 53 public String group() { 54 return text.substring(start(), end()); 55 } 56 57 public String group(int group) { 58 int from = offsets[group * 2]; 59 int to = offsets[(group * 2) + 1]; 60 if (from == -1 || to == -1) { 61 return null; 62 } else { 63 return text.substring(from, to); 64 } 65 } 66 67 public int groupCount() { 68 return (offsets.length / 2) - 1; 69 } 70 71 public int start() { 72 return start(0); 73 } 74 75 public int start(int group) { 76 return offsets[2 * group]; 77 } 78 79 } 80
