package org.apache.maven.surefire.util.internal;
   
   /*
    * 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.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStreamWriter;
  import java.io.PrintWriter;
  import java.io.Writer;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  import static org.apache.maven.surefire.util.internal.StringUtils.UTF_8;
  
  /**
   * Dumps a text or exception in dump file.
   * Each call logs a date when it was written to the dump file.
   *
   * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
   * @since 2.20
   */
  public final class DumpFileUtils
  {
      private DumpFileUtils()
      {
          throw new IllegalStateException( "no instantiable constructor" );
      }
  
      /**
       * New dump file. Synchronized object appears in main memory and perfectly visible in other threads.
       *
       * @param reportsDir    only report directory
       * @param dumpFileName    dump file name
       */
      public static synchronized File newDumpFile( File reportsDir, String dumpFileName )
      {
          return new File( reportsDir, dumpFileName );
      }
  
      public static void dumpException( Throwable t, File dumpFile )
      {
          dumpException( t, null, dumpFile );
      }
  
      public static void dumpException( Throwable t, String msg, File dumpFile )
      {
          try
          {
              if ( t != null && dumpFile != null
                           && ( dumpFile.exists() || mkdirs( dumpFile ) && dumpFile.createNewFile() ) )
              {
                  Writer fw = createWriter( dumpFile );
                  if ( msg != null )
                  {
                      fw.append( msg )
                              .append( StringUtils.NL );
                  }
                  PrintWriter pw = new PrintWriter( fw );
                  t.printStackTrace( pw );
                  pw.flush();
                  fw.append( StringUtils.NL )
                    .append( StringUtils.NL )
                    .close();
              }
          }
          catch ( Exception e )
          {
              // do nothing
          }
      }
  
      public static void dumpText( String msg, File dumpFile )
      {
          try
          {
              if ( msg != null && dumpFile != null
                           && ( dumpFile.exists() || mkdirs( dumpFile ) && dumpFile.createNewFile() ) )
              {
                  createWriter( dumpFile )
                          .append( msg )
                          .append( StringUtils.NL )
                         .append( StringUtils.NL )
                         .close();
             }
         }
         catch ( Exception e )
         {
             // do nothing
         }
     }
 
     public static String newFormattedDateFileName()
     {
         return new SimpleDateFormat( "yyyy-MM-dd'T'HH-mm-ss_SSS" ).format( new Date() );
     }
 
     private static Writer createWriter( File dumpFile ) throws IOException
     {
         return new OutputStreamWriter( new FileOutputStream( dumpFile, true ), UTF_8 )
                        .append( "# Created at " )
                        .append( new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss.SSS" ).format( new Date() ) )
                        .append( StringUtils.NL );
     }
 
     private static boolean mkdirs( File dumpFile )
     {
         File dir = dumpFile.getParentFile();
         return dir.exists() || dir.mkdirs();
     }
 }