package org.apache.maven.resolver.internal.ant;
   
   /*
    * 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.FileNotFoundException;
  
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.Task;
  import org.eclipse.aether.AbstractRepositoryListener;
  import org.eclipse.aether.RepositoryEvent;
  import org.eclipse.aether.transfer.MetadataNotFoundException;
  
  /**
   * Logs repository events like installed and unresolved artifacts and metadata.
   */
  class AntRepositoryListener
      extends AbstractRepositoryListener
  {
  
      private Task task;
  
      AntRepositoryListener( Task task )
      {
          this.task = task;
      }
  
      @Override
      public void artifactInstalling( RepositoryEvent event )
      {
          task.log( "Installing " + event.getArtifact().getFile() + " to " + event.getFile() );
      }
  
      @Override
      public void metadataInstalling( RepositoryEvent event )
      {
          task.log( "Installing " + event.getMetadata() + " to " + event.getFile() );
      }
  
      @Override
      public void metadataResolved( RepositoryEvent event )
      {
          Exception e = event.getException();
          if ( e != null )
          {
              if ( e instanceof MetadataNotFoundException )
              {
                  task.log( e.getMessage(), Project.MSG_DEBUG );
              }
              else
              {
                  task.log( e.getMessage(), e, Project.MSG_WARN );
              }
          }
      }
  
      @Override
      public void metadataInvalid( RepositoryEvent event )
      {
          Exception exception = event.getException();
  
          StringBuilder buffer = new StringBuilder( 256 );
          buffer.append( "The metadata " );
          if ( event.getMetadata().getFile() != null )
          {
              buffer.append( event.getMetadata().getFile() );
          }
          else
          {
              buffer.append( event.getMetadata() );
          }
  
          if ( exception instanceof FileNotFoundException )
          {
              buffer.append( " is inaccessible" );
          }
          else
          {
              buffer.append( " is invalid" );
          }
  
          if ( exception != null )
          {
             buffer.append( ": " );
             buffer.append( exception.getMessage() );
         }
 
         task.log( buffer.toString(), exception, Project.MSG_WARN );
     }
 
     @Override
     public void artifactDescriptorInvalid( RepositoryEvent event )
     {
         task.log( "The POM for " + event.getArtifact() + " is invalid"
                       + ", transitive dependencies (if any) will not be available: "
                       + event.getException().getMessage(),
                   event.getException(), Project.MSG_WARN );
     };
 
     @Override
     public void artifactDescriptorMissing( RepositoryEvent event )
     {
         task.log( "The POM for " + event.getArtifact() + " is missing, no dependency information available",
                   Project.MSG_WARN );
     };
 
 }