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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.maven.building;
20  
21  import java.util.List;
22  
23  /**
24   * Collects problems that are encountered during settings building.
25   *
26   */
27  public interface ProblemCollector {
28  
29      /**
30       * Adds the specified problem.
31       * Either message or exception is required
32       *
33       * @param severity The severity of the problem, must not be {@code null}.
34       * @param message The detail message of the problem, may be {@code null}.
35       * @param line The one-based index of the line containing the problem or {@code -1} if unknown.
36       * @param column The one-based index of the column containing the problem or {@code -1} if unknown.
37       * @param cause The cause of the problem, may be {@code null}.
38       */
39      void add(Problem.Severity severity, String message, int line, int column, Exception cause);
40  
41      /**
42       * The next messages will be bound to this source. When calling this method again, previous messages keep
43       * their source, but the next messages will use the new source.
44       *
45       * @param source a source
46       */
47      void setSource(String source);
48  
49      /**
50       *
51       * @return the collected Problems, never {@code null}
52       */
53      List<Problem> getProblems();
54  }