package org.apache.maven.project;
   
   /*
    * 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 java.io.File;
  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.util.List;
  
  import org.apache.maven.model.building.ModelProblem;
  import org.apache.maven.model.building.ModelProblemUtils;
  
  /**
   * @author Jason van Zyl
   */
  public class ProjectBuildingException
      extends Exception
  {
      private final String projectId;
  
      private File pomFile;
  
      private List<ProjectBuildingResult> results;
  
      public ProjectBuildingException( String projectId, String message, Throwable cause )
      {
          super( createMessage( message, projectId, null ), cause );
          this.projectId = projectId;
      }
  
      /**
       * @param projectId
       * @param message
       * @param pomFile   pom file location
       */
      public ProjectBuildingException( String projectId, String message, File pomFile )
      {
          super( createMessage( message, projectId, pomFile ) );
          this.projectId = projectId;
          this.pomFile = pomFile;
      }
  
      /**
       * @param projectId
       * @param message
       * @param pomFile   pom file location
       * @param cause
       */
      protected ProjectBuildingException( String projectId, String message, File pomFile, Throwable cause )
      {
          super( createMessage( message, projectId, pomFile ), cause );
          this.projectId = projectId;
          this.pomFile = pomFile;
      }
  
      public ProjectBuildingException( List<ProjectBuildingResult> results )
      {
          super( createMessage( results ) );
          this.projectId = "";
          this.results = results;
      }
  
      public File getPomFile()
      {
          return pomFile;
      }
  
      /**
       * @deprecated use {@link #getPomFile()}
       */
      public String getPomLocation()
      {
          if ( getPomFile() != null )
          {
              return getPomFile().getAbsolutePath();
          }
          else
          {
              return "null";
          }
      }
  
     public String getProjectId()
     {
         return projectId;
     }
 
     public List<ProjectBuildingResult> getResults()
     {
         return results;
     }
 
     private static String createMessage( String message, String projectId, File pomFile )
     {
         StringBuilder buffer = new StringBuilder( 256 );
         buffer.append( message );
         buffer.append( " for project " ).append( projectId );
         if ( pomFile != null )
         {
             buffer.append( " at " ).append( pomFile.getAbsolutePath() );
         }
         return buffer.toString();
     }
 
     private static String createMessage( List<ProjectBuildingResult> results )
     {
         StringWriter buffer = new StringWriter( 1024 );
 
         PrintWriter writer = new PrintWriter( buffer );
         writer.println( "Some problems were encountered while processing the POMs:" );
         for ( ProjectBuildingResult result : results )
         {
             for ( ModelProblem problem : result.getProblems() )
             {
                 writer.print( "[" );
                 writer.print( problem.getSeverity() );
                 writer.print( "] " );
                 writer.print( problem.getMessage() );
                 writer.print( " @ " );
                 writer.println( ModelProblemUtils.formatLocation( problem, result.getProjectId() ) );
             }
         }
         writer.close();
 
         return buffer.toString();
     }
 
 }