package org.apache.maven.shared.io;
   
   /*
    * 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.BufferedReader;
  import java.io.File;
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.io.Reader;
  import java.io.StringReader;
  import java.io.StringWriter;
  import java.io.Writer;
  
  import org.apache.maven.shared.utils.io.IOUtil;
  import org.apache.maven.shared.utils.ReaderFactory;
  import org.apache.maven.shared.utils.WriterFactory;
  
  public final class Utils
  {
  
      private Utils()
      {
      }
  
      private static void write( Writer writer, String content )
          throws IOException
      {
          try
          {
              writer.write( content );
          }
          finally
          {
              IOUtil.close( writer );
          }
      }
  
      public static void writePlatformFile( File file, String content )
          throws IOException
      {
          write( WriterFactory.newPlatformWriter( file ), content );
      }
  
      public static void writeFileWithEncoding( File file, String content, String encoding )
          throws IOException
      {
          write( WriterFactory.newWriter( file, encoding ), content );
      }
  
      public static void writeXmlFile( File file, String content )
          throws IOException
      {
          write( WriterFactory.newXmlWriter( file ), content );
      }
  
      /**
       * writes content to a file, using platform encoding.
       * @deprecated this API isn't explicit about encoding, use writePlatformFile() or writeXmlFile()
       * depending on your need
       */
      public static void writeToFile( File file, String testStr )
          throws IOException
      {
          writePlatformFile( file, testStr );
      }
  
      /**
       * reads content from a file and normalize EOLs to simple line feed (\\n), using platform encoding.
       * @deprecated this API isn't explicit about encoding nor EOL normalization, use readPlatformFile() or
       * readXmlFile() depending on your need, in conjunction with normalizeEndOfLine()
       */
      public static String readFile( File file ) throws IOException
      {
          return normalizeEndOfLine( readPlatformFile( file ) );
      }
  
      public static String readPlatformFile( File file ) throws IOException
      {
          StringWriter buffer = new StringWriter();
  
          Reader reader = ReaderFactory.newPlatformReader( file );
  
         IOUtil.copy( reader, buffer );
 
         return buffer.toString();
     }
 
     public static String readXmlFile( File file ) throws IOException
     {
         StringWriter buffer = new StringWriter();
 
         Reader reader = ReaderFactory.newXmlReader( file );
 
         IOUtil.copy( reader, buffer );
 
         return buffer.toString();
     }
 
     /**
      * normalize EOLs to simple line feed (\\n).
      */
     public static String normalizeEndOfLine( String content )
     {
         StringBuffer buffer = new StringBuffer();
 
         BufferedReader reader = new BufferedReader( new StringReader( content ) );
 
         String line = null;
 
         try {
             while( ( line = reader.readLine() ) != null )
             {
                 if ( buffer.length() > 0 )
                 {
                     buffer.append( '\n' );
                 }
 
                 buffer.append( line );
             }
         }
         catch ( IOException ioe )
         {
             // should not occur since everything happens in-memory
         }
 
         return buffer.toString();
     }
 
     public static String toString( Throwable error )
     {
         StringWriter sw = new StringWriter();
         PrintWriter pw = new PrintWriter( sw );
 
         error.printStackTrace( pw );
 
         return sw.toString();
     }
 }