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Java > Open Source Codes > org > apache > maven > usability > ArtifactResolverDiagnoser


1 package org.apache.maven.usability;
2
3 /*
4  * Copyright 2001-2005 The Apache Software Foundation.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * 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, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19 import org.apache.maven.artifact.manager.WagonManager;
20 import org.apache.maven.artifact.resolver.ArtifactResolutionException;
21 import org.apache.maven.usability.diagnostics.DiagnosisUtils;
22 import org.apache.maven.usability.diagnostics.ErrorDiagnoser;
23
24 import java.io.IOException JavaDoc;
25
26 public class ArtifactResolverDiagnoser
27     implements ErrorDiagnoser
28 {
29
30     private WagonManager wagonManager;
31
32     public boolean canDiagnose( Throwable JavaDoc error )
33     {
34         return DiagnosisUtils.containsInCausality( error, ArtifactResolutionException.class );
35     }
36
37     public String JavaDoc diagnose( Throwable JavaDoc error )
38     {
39         ArtifactResolutionException exception =
40             (ArtifactResolutionException) DiagnosisUtils.getFromCausality( error, ArtifactResolutionException.class );
41
42         StringBuffer JavaDoc message = new StringBuffer JavaDoc();
43
44         message.append( "Failed to resolve artifact." );
45         message.append( "\n\n" );
46         message.append( exception.getMessage() );
47         
48         IOException JavaDoc ioe = (IOException JavaDoc) DiagnosisUtils.getFromCausality( exception, IOException JavaDoc.class );
49         
50         if ( ioe != null && exception.getMessage().indexOf( ioe.getMessage() ) < 0 )
51         {
52             message.append( "\n\nCaused by I/O exception: " ).append( ioe.getMessage() );
53         }
54
55         if ( !wagonManager.isOnline() )
56         {
57             message.append( "\n" ).append( SystemWarnings.getOfflineWarning() );
58         }
59
60         message.append( "\n" );
61
62         return message.toString();
63     }
64
65 }
66
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