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.api.services;
20
21 import org.apache.maven.api.annotations.Experimental;
22 import org.apache.maven.api.annotations.Immutable;
23 import org.apache.maven.api.annotations.Nonnull;
24 import org.apache.maven.api.annotations.Nullable;
25
26 /**
27 * Describes a problem that was encountered during project building. A problem can either be an exception that was
28 * thrown or a simple string message. In addition, a problem carries a hint about its source.
29 *
30 * @since 4.0
31 */
32 @Experimental
33 @Immutable
34 public interface BuilderProblem {
35
36 /**
37 * Gets the hint about the source of the problem. While the syntax of this hint is unspecified and depends on the
38 * creator of the problem, the general expectation is that the hint provides sufficient information to the user to
39 * track the problem back to its origin. A concrete example for such a source hint can be the file path or URL from
40 * which the settings were read.
41 *
42 * @return the hint about the source of the problem or an empty string if unknown, never {@code null}
43 */
44 @Nonnull
45 String getSource();
46
47 /**
48 * Gets the one-based index of the line containing the problem. The line number should refer to some text file that
49 * is given by {@link #getSource()}.
50 *
51 * @return the one-based index of the line containing the problem or a non-positive value if unknown
52 */
53 int getLineNumber();
54
55 /**
56 * Gets the one-based index of the column containing the problem. The column number should refer to some text file
57 * that is given by {@link #getSource()}.
58 *
59 * @return the one-based index of the column containing the problem or non-positive value if unknown
60 */
61 int getColumnNumber();
62
63 /**
64 * Gets the location of the problem. The location is a user-friendly combination of the values from
65 * {@link #getSource()}, {@link #getLineNumber()} and {@link #getColumnNumber()}. The exact syntax of the returned
66 * value is undefined.
67 *
68 * @return the location of the problem, never {@code null}
69 */
70 @Nonnull
71 String getLocation();
72
73 /**
74 * Gets the exception that caused this problem (if any).
75 *
76 * @return the exception that caused this problem or {@code null} if not applicable
77 */
78 @Nullable
79 Exception getException();
80
81 /**
82 * Gets the message that describes this problem.
83 *
84 * @return the message describing this problem, never {@code null}
85 */
86 @Nonnull
87 String getMessage();
88
89 /**
90 * Gets the severity level of this problem.
91 *
92 * @return the severity level of this problem, never {@code null}
93 */
94 @Nonnull
95 Severity getSeverity();
96
97 /**
98 * The different severity levels for a problem, in decreasing order.
99 *
100 * @since 4.0
101 */
102 @Experimental
103 enum Severity {
104 FATAL, //
105 ERROR, //
106 WARNING //
107 }
108 }