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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.ArrayList;
22  import java.util.Collection;
23  import java.util.Objects;
24  
25  import org.apache.rat.analysis.IHeaderMatcher;
26  
27  /**
28   * A class that implements IHeaderMatcher as a collection of other IHeaderMatchers.
29   */
30  public abstract class AbstractMatcherContainer extends AbstractHeaderMatcher {
31  
32      protected final Collection<IHeaderMatcher> enclosed;
33  
34      /**
35       * Constructs the abstract matcher container.
36       * If the {@code id} is not set then a unique random identifier is created.
37       * The {@code enclosed} collection is preserved in a new collection that retains the order of
38       * of the original collection.
39       * @param id The id for the matcher.
40       * @param enclosed the collection of enclosed matchers.  
41       */
42      public AbstractMatcherContainer(String id, Collection<? extends IHeaderMatcher> enclosed) {
43          super(id);
44          Objects.requireNonNull(enclosed, "The collection of IHeaderMatcher may not be null");
45          this.enclosed = new ArrayList<>(enclosed);
46      }
47  
48      /**
49       * Constructs the abstract matcher container with a unique random id.
50       * The {@code enclosed} collection is preserved in a new collection that retains the order of
51       * of the original collection.
52       * @param enclosed the collection of enclosed matchers.  
53       */
54      public AbstractMatcherContainer(Collection<? extends IHeaderMatcher> enclosed) {
55          this(null, enclosed);
56      }
57  
58      @Override
59      public void reset() {
60          enclosed.forEach(IHeaderMatcher::reset);
61      }
62  
63      @Override
64      public State finalizeState() {
65          enclosed.forEach(IHeaderMatcher::finalizeState);
66          return currentState();
67      }
68  }