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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.project.InvalidProjectModelException;
23  import org.apache.maven.project.ProjectBuildingException;
24  import org.apache.maven.project.validation.ModelValidationResult;
25  import org.apache.maven.usability.diagnostics.DiagnosisUtils;
26  import org.apache.maven.usability.diagnostics.ErrorDiagnoser;
27  
28  public class ProjectBuildDiagnoser
29      implements ErrorDiagnoser
30  {
31  
32      public boolean canDiagnose( Throwable error )
33      {
34          return DiagnosisUtils.containsInCausality( error, ProjectBuildingException.class );
35      }
36  
37      public String diagnose( Throwable error )
38      {
39          ProjectBuildingException pbe =
40              (ProjectBuildingException) DiagnosisUtils.getFromCausality( error, ProjectBuildingException.class );
41  
42          StringBuffer message = new StringBuffer();
43  
44          message.append( "Error building POM (may not be this project's POM)." ).append( "\n\n" );
45  
46          message.append( "\nProject ID: " ).append( pbe.getProjectId() );
47  
48          if ( pbe instanceof InvalidProjectModelException )
49          {
50              InvalidProjectModelException ipme = (InvalidProjectModelException) pbe;
51  
52              message.append( "\nPOM Location: " ).append( ipme.getPomLocation() );
53  
54              ModelValidationResult result = ipme.getValidationResult();
55  
56              if ( result != null )
57              {
58                  message.append( "\nValidation Messages:\n\n" ).append( ipme.getValidationResult().render( "    " ) );
59              }
60          }
61  
62          message.append( "\n\n" ).append( "Reason: " ).append( pbe.getMessage() );
63  
64          message.append( "\n\n" );
65  
66          return message.toString();
67      }
68  
69  }