1 package org.eclipse.aether.collection;
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 org.eclipse.aether.RepositoryException;
23
24 /**
25 * Thrown in case of bad artifact descriptors, version ranges or other issues encountered during calculation of the
26 * dependency graph.
27 */
28 public class DependencyCollectionException
29 extends RepositoryException
30 {
31
32 private final transient CollectResult result;
33
34 /**
35 * Creates a new exception with the specified result.
36 *
37 * @param result The collection result at the point the exception occurred, may be {@code null}.
38 */
39 public DependencyCollectionException( CollectResult result )
40 {
41 super( "Failed to collect dependencies for " + getSource( result ), getCause( result ) );
42 this.result = result;
43 }
44
45 /**
46 * Creates a new exception with the specified result and detail message.
47 *
48 * @param result The collection result at the point the exception occurred, may be {@code null}.
49 * @param message The detail message, may be {@code null}.
50 */
51 public DependencyCollectionException( CollectResult result, String message )
52 {
53 super( message, getCause( result ) );
54 this.result = result;
55 }
56
57 /**
58 * Creates a new exception with the specified result, detail message and cause.
59 *
60 * @param result The collection result at the point the exception occurred, may be {@code null}.
61 * @param message The detail message, may be {@code null}.
62 * @param cause The exception that caused this one, may be {@code null}.
63 */
64 public DependencyCollectionException( CollectResult result, String message, Throwable cause )
65 {
66 super( message, cause );
67 this.result = result;
68 }
69
70 /**
71 * Gets the collection result at the point the exception occurred. Despite being incomplete, callers might want to
72 * use this result to fail gracefully and continue their operation with whatever interim data has been gathered.
73 *
74 * @return The collection result or {@code null} if unknown.
75 */
76 public CollectResult getResult()
77 {
78 return result;
79 }
80
81 private static String getSource( CollectResult result )
82 {
83 if ( result == null )
84 {
85 return "";
86 }
87
88 CollectRequest request = result.getRequest();
89 if ( request.getRoot() != null )
90 {
91 return request.getRoot().toString();
92 }
93 if ( request.getRootArtifact() != null )
94 {
95 return request.getRootArtifact().toString();
96 }
97
98 return request.getDependencies().toString();
99 }
100
101 private static Throwable getCause( CollectResult result )
102 {
103 Throwable cause = null;
104 if ( result != null && !result.getExceptions().isEmpty() )
105 {
106 cause = result.getExceptions().get( 0 );
107 }
108 return cause;
109 }
110
111 }