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1   package org.apache.maven.usability;
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.apache.maven.artifact.manager.WagonManager;
23  import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
24  import org.apache.maven.usability.diagnostics.DiagnosisUtils;
25  import org.apache.maven.usability.diagnostics.ErrorDiagnoser;
26  
27  public class ArtifactNotFoundDiagnoser
28      implements ErrorDiagnoser
29  {
30  
31      private WagonManager wagonManager;
32  
33      public boolean canDiagnose( Throwable error )
34      {
35          return DiagnosisUtils.containsInCausality( error, ArtifactNotFoundException.class );
36      }
37  
38      public String diagnose( Throwable error )
39      {
40          ArtifactNotFoundException exception =
41              (ArtifactNotFoundException) DiagnosisUtils.getFromCausality( error, ArtifactNotFoundException.class );
42  
43          StringBuffer message = new StringBuffer();
44  
45          message.append( "Failed to resolve artifact.\n" );
46          message.append( "\nGroupId: " ).append( exception.getGroupId() );
47          message.append( "\nArtifactId: " ).append( exception.getArtifactId() );
48          message.append( "\nVersion: " ).append( exception.getVersion() );
49          message.append( "\n\n" );
50          message.append( "Reason: " ).append( exception.getMessage() );
51  
52          if ( !wagonManager.isOnline() )
53          {
54              message.append( "\n" ).append( SystemWarnings.getOfflineWarning() );
55          }
56  
57          message.append( "\n" );
58  
59          return message.toString();
60      }
61  
62  }