1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one *
3 * or more contributor license agreements. See the NOTICE file *
4 * distributed with this work for additional information *
5 * regarding copyright ownership. The ASF licenses this file *
6 * to you under the Apache License, Version 2.0 (the *
7 * "License"); you may not use this file except in compliance *
8 * with the License. You may obtain a copy of the License at *
9 * *
10 * http://www.apache.org/licenses/LICENSE-2.0 *
11 * *
12 * Unless required by applicable law or agreed to in writing, *
13 * software distributed under the License is distributed on an *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
15 * KIND, either express or implied. See the License for the *
16 * specific language governing permissions and limitations *
17 * under the License. *
18 */
19 package org.apache.rat.analysis.matchers;
20
21 import java.util.Objects;
22
23 import org.apache.rat.analysis.IHeaderMatcher;
24 /**
25 * An IHeaderMatcher that reverses the result of an enclosed matcher.
26 */
27 public class NotMatcher extends AbstractHeaderMatcher {
28
29 private final IHeaderMatcher enclosed;
30
31 /**
32 * Create the matcher with the enclosed matcher.
33 * @param enclosed the enclosed matcher
34 */
35 public NotMatcher(IHeaderMatcher enclosed) {
36 this(null, enclosed);
37 }
38
39 /**
40 * Create the matcher with the enclosed matcher and id.
41 * @param id the id for this matcher.
42 * @param enclosed the enclosed matcher
43 */
44 public NotMatcher(String id, IHeaderMatcher enclosed) {
45 super(id);
46 Objects.requireNonNull(enclosed, "enclosed matcher may not be null");
47 this.enclosed = enclosed;
48 }
49
50 @Override
51 public State matches(String line) {
52 enclosed.matches(line);
53 return currentState();
54 }
55
56 @Override
57 public void reset() {
58 enclosed.reset();
59 }
60
61 @Override
62 public State finalizeState() {
63 enclosed.finalizeState();
64 return currentState();
65 }
66
67 @Override
68 public State currentState() {
69 switch (enclosed.currentState()) {
70 case t:
71 return State.f;
72 case f:
73 return State.t;
74 default:
75 case i:
76 return State.i;
77 }
78 }
79 }