package org.apache.maven.usability;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *  http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import org.apache.maven.artifact.InvalidArtifactRTException;

 import org.apache.maven.usability.diagnostics.ErrorDiagnoser;

 public class InvalidArtifactDiagnoser

     implements ErrorDiagnoser

 {

     public boolean canDiagnose( Throwable error )

     {

         return error instanceof InvalidArtifactRTException;

     }

     public String diagnose( Throwable error )

     {

         StringBuffer diagnosis = new StringBuffer();

         InvalidArtifactRTException e = (InvalidArtifactRTException) error;

         diagnosis.append( "An invalid artifact was detected.\n\n" )

             .append( "This artifact might be in your project's POM, " )

             .append( "or it might have been included transitively during the resolution process. " )

             .append( "Here is the information we do have for this artifact:\n" )

             .append( "\n    o GroupID:     " ).append( maybeFlag( e.getGroupId() ) )

             .append( "\n    o ArtifactID:  " ).append( maybeFlag( e.getArtifactId() ) )

             .append( "\n    o Version:     " ).append( maybeFlag( e.getVersion() ) )

             .append( "\n    o Type:        " ).append( maybeFlag( e.getType() ) )

             .append( "\n" );

         return diagnosis.toString();

     }

     private String maybeFlag( String value )

     {

         if ( value == null || value.trim().length() < 1 )

         {

             return "<<< MISSING >>>";

         }

         else

         {

             return value;

         }

     }

 }