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1   package org.apache.maven.model.building;
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  /**
23   * Describes a problem that was encountered during model building. A problem can either be an exception that was thrown
24   * or a simple string message. In addition, a problem carries a hint about its source, e.g. the POM file that exhibits
25   * the problem.
26   * 
27   * @author Benjamin Bentmann
28   */
29  public interface ModelProblem
30  {
31  
32      /**
33       * The different severity levels for a problem, in decreasing order.
34       */
35      enum Severity
36      {
37  
38          FATAL, //
39          ERROR, //
40          WARNING //
41  
42      }
43  
44      enum Version
45      {
46          //based on ModeBuildingResult.validationLevel
47          BASE,
48          V20,
49          V30,
50          V31
51      }
52  
53      /**
54       * Gets the hint about the source of the problem. While the syntax of this hint is unspecified and depends on the
55       * creator of the problem, the general expectation is that the hint provides sufficient information to the user to
56       * track the problem back to its origin. A concrete example for such a source hint can be the file path or URL from
57       * which a POM was read.
58       * 
59       * @return The hint about the source of the problem or an empty string if unknown, never {@code null}.
60       */
61      String getSource();
62  
63      /**
64       * Gets the one-based index of the line containing the problem. The line number should refer to some text file that
65       * is given by {@link #getSource()}.
66       * 
67       * @return The one-based index of the line containing the problem or a non-positive value if unknown.
68       */
69      int getLineNumber();
70  
71      /**
72       * Gets the one-based index of the column containing the problem. The column number should refer to some text file
73       * that is given by {@link #getSource()}.
74       * 
75       * @return The one-based index of the column containing the problem or non-positive value if unknown.
76       */
77      int getColumnNumber();
78  
79      /**
80       * Gets the identifier of the model from which the problem originated. While the general form of this identifier is
81       * <code>groupId:artifactId:version</code> the returned identifier need not be complete. The identifier is derived
82       * from the information that is available at the point the problem occurs and as such merely serves as a best effort
83       * to provide information to the user to track the problem back to its origin.
84       * 
85       * @return The identifier of the model from which the problem originated or an empty string if unknown, never
86       *         {@code null}.
87       */
88      String getModelId();
89  
90      /**
91       * Gets the exception that caused this problem (if any).
92       * 
93       * @return The exception that caused this problem or {@code null} if not applicable.
94       */
95      Exception getException();
96  
97      /**
98       * Gets the message that describes this problem.
99       * 
100      * @return The message describing this problem, never {@code null}.
101      */
102     String getMessage();
103 
104     /**
105      * Gets the severity level of this problem.
106      * 
107      * @return The severity level of this problem, never {@code null}.
108      */
109     Severity getSeverity();
110 
111     /**
112      * Gets the applicable maven version/validation level of this problem
113      * @return The version, never {@code null}.
114      */
115     Version getVersion();
116 
117 }