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.project.InvalidProjectModelException;

 import org.apache.maven.project.ProjectBuildingException;

 import org.apache.maven.project.validation.ModelValidationResult;

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

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

 public class ProjectBuildDiagnoser

     implements ErrorDiagnoser

 {

     public boolean canDiagnose( Throwable error )

     {

         return DiagnosisUtils.containsInCausality( error, ProjectBuildingException.class );

     }

     public String diagnose( Throwable error )

     {

         ProjectBuildingException pbe =

             (ProjectBuildingException) DiagnosisUtils.getFromCausality( error, ProjectBuildingException.class );

         StringBuffer message = new StringBuffer();

         message.append( "Error building POM (may not be this project's POM)." ).append( "\n\n" );

         message.append( "\nProject ID: " ).append( pbe.getProjectId() );

         if ( pbe instanceof InvalidProjectModelException )

         {

             InvalidProjectModelException ipme = (InvalidProjectModelException) pbe;

             message.append( "\nPOM Location: " ).append( ipme.getPomLocation() );

             ModelValidationResult result = ipme.getValidationResult();

             if ( result != null )

             {

                 message.append( "\nValidation Messages:\n\n" ).append( ipme.getValidationResult().render( "    " ) );

             }

         }

         message.append( "\n\n" ).append( "Reason: " ).append( pbe.getMessage() );

         message.append( "\n\n" );

         return message.toString();

     }

 }