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: 1.4.2.2 $
21: */package java.util.regex;
22:
23: import java.util.ArrayList;
24:
25: /**
26: * Negative look ahead node.
27: *
28: * @author Nikolay A. Kuznetsov
29: * @version $Revision: 1.4.2.2 $
30: */
31: class NegativeLookAhead extends AtomicJointSet {
32:
33: public NegativeLookAhead(ArrayList children, FSet fSet) {
34: super (children, fSet);
35: }
36:
37: /**
38: * Returns stringIndex+shift, the next position to match
39: */
40: public int matches(int stringIndex, CharSequence testString,
41: MatchResultImpl matchResult) {
42: int size = children.size();
43:
44: for (int i = 0; i < size; i++) {
45: AbstractSet e = (AbstractSet) children.get(i);
46: if (e.matches(stringIndex, testString, matchResult) >= 0)
47: return -1;
48: }
49:
50: return next.matches(stringIndex, testString, matchResult);
51: }
52:
53: public boolean hasConsumed(MatchResultImpl matchResult) {
54: return false;
55: }
56:
57: protected String getName() {
58: return "NegLookaheadJointSet"; //$NON-NLS-1$
59: }
60: }
|