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/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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 java.util.regex;
/**
* Holds the results of a successful match of a regular expression against a
* given string. Only used internally, thus sparsely documented (though the
* defining public interface has full documentation).
*
* @see java.util.regex.MatchResult
*/
class MatchResultImpl implements MatchResult {
/**
* Holds the original input text.
*/
private String text;
/**
* Holds the offsets of the groups in the input text. The first two
* elements specify start and end of the zero group, the next two specify
* group 1, and so on.
*/
private int[] offsets;
MatchResultImpl(String text, int[] offsets) {
this.text = text;
this.offsets = offsets.clone();
}
public int end() {
return end(0);
}
public int end(int group) {
return offsets[2 * group + 1];
}
public String group() {
return text.substring(start(), end());
}
public String group(int group) {
int from = offsets[group * 2];
int to = offsets[(group * 2) + 1];
if (from == -1 || to == -1) {
return null;
} else {
return text.substring(from, to);
}
}
public int groupCount() {
return (offsets.length / 2) - 1;
}
public int start() {
return start(0);
}
public int start(int group) {
return offsets[2 * group];
}
}
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