01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: /**
19: * @author Nikolay A. Kuznetsov
20: * @version $Revision: 1.9.2.2 $
21: */package java.util.regex;
22:
23: /**
24: * Represents "?" quantifier over composite sets.
25: * @author Nikolay A. Kuznetsov
26: * @version $Revision: 1.9.2.2 $
27: */
28: class AltGroupQuantifierSet extends GroupQuantifierSet {
29:
30: public AltGroupQuantifierSet(AbstractSet innerSet,
31: AbstractSet next, int type) {
32: super (innerSet, next, type);
33:
34: }
35:
36: public int matches(int stringIndex, CharSequence testString,
37: MatchResultImpl matchResult) {
38:
39: if (!innerSet.hasConsumed(matchResult))
40: return next.matches(stringIndex, testString, matchResult);
41:
42: int nextIndex = innerSet.matches(stringIndex, testString,
43: matchResult);
44:
45: if (nextIndex < 0) {
46: return next.matches(stringIndex, testString, matchResult);
47: } else {
48: return nextIndex;
49: }
50: }
51:
52: public void setNext(AbstractSet next) {
53: super.setNext(next);
54: innerSet.setNext(next);
55: }
56: }
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