package org.apache.archiva.transaction;
   
   /*
    * 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.IOException;
  import java.util.List;
  
  import org.codehaus.plexus.digest.Digester;
  
  /**
   * Event for creating a file from a string content.
   *
   *
   */
  public class CreateFileEvent
      extends AbstractTransactionEvent
  {
      private final File destination;
  
      private final String content;
  
      /**
       * 
       * @param content
       * @param destination
       * @param digesters {@link List}<{@link Digester}> digesters to use for checksumming 
       */
      public CreateFileEvent( String content, File destination, List<? extends Digester> digesters )
      {
          super( digesters );
          this.content = content;
          this.destination = destination;
      }
  
      @Override
      public void commit()
          throws IOException
      {
          createBackup( destination );
  
          mkDirs( destination.getParentFile() );
  
          if ( !destination.exists() && !destination.createNewFile() )
          {
              throw new IOException( "Unable to create new file" );
          }
  
          writeStringToFile( destination, content );
  
          createChecksums( destination, true );
      }
  
      @Override
      public void rollback()
          throws IOException
      {
          destination.delete();
  
          revertFilesCreated();
  
          revertMkDirs();
  
          restoreBackups();
      }
  }