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1   package org.apache.rat.mp.util.ignore;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.util.Optional;
23  
24  public interface IgnoreMatcher {
25      /**
26       * Checks if the file matches the stored expressions.
27       * @param filename The filename to be checked
28       * @return empty: not matched, True: must be ignored, False: it must be UNignored
29       */
30      Optional<Boolean> isIgnoredFile(String filename);
31  
32      /**
33       * Returns {@code true} if this IgnoreMatcher contains no rules.
34       * @return {@code true} if this IgnoreMatcher contains no rules
35       */
36      boolean isEmpty();
37  }