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/*

 * Created on 11.11.2003

 *

 * $Id: StringTool.java,v 1.1 2006/06/14 07:29:07 cesar Exp $

 * IzPack

 * Copyright (C) 2002 by Marc Eppelmann

 *

 * File :               StringTool.java

 * Description :        Extended implemenation of Pythons string.replace and more...

 * Author's email :     marc.eppelmann@gmx.de

 * Website :            http://www.izforge.com

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 *

 */

package com.izforge.izpack.util;

import java.io.File;

/**

 * A extended Java Implementation of Pythons string.replace()

 *

 * @author marc.eppelmann@gmx.de

 */

public class StringTool

{

  //~ Constructors *********************************************************************************

  /**

   * Default Constructor

   */

  public StringTool(  )

  {

    super(  );

  }

  //~ Methods **************************************************************************************

  /**

   * Test method

   *

   * @param args Commandline Args

   */

  public static void main( String[] args )

  {

    System.out.println( "Test: string.replace(abc$defg,$de ,null ):" + StringTool.replace( "abc$defg", "$de", null, true ) );

  }

  /**

   * Replaces <b>from</b> with <b>to</b> in given String: <b>value</b>

   *

   * @param value original String

   * @param from Search Pattern

   * @param to Replace with this

   *

   * @return the replaced String

   */

  public static String replace( String value, String from, String to )

  {

    return replace( value, from, to, true );

  }

  /**

   * Replaces <b>from</b> with <b>to</b> in given String: <b>value</b>

   *

   * @param value original String

   * @param from Search Pattern

   * @param to Replace with this

   * @param If set to true be case sensitive.

   *

   * @return the replaced String

   */

  public static String replace( String value, String from, String to, boolean aCaseSensitiveFlag )

  {

    if( ( value == null ) || ( value.length(  ) == 0 ) || ( from == null ) || ( from.length(  ) == 0 ) )

    {

      return value;

    }

    if( to == null )

    {

      to = "";

    }

    String searchData = value;

    if( ! aCaseSensitiveFlag )

    {

      searchData = value.toLowerCase(  );

      from       = from.toLowerCase(  );

    }

    String result = value;

    int    lastIndex = 0;

    int    index = value.indexOf( from );

    if( index != -1 )

    {

      StringBuffer buffer = new StringBuffer(  );

      while( index != -1 )

      {

        buffer.append( value.substring( lastIndex, index ) ).append( to );

        lastIndex = index + from.length(  );

        index     = value.indexOf( from, lastIndex );

      }

      buffer.append( value.substring( lastIndex ) );

      result = buffer.toString(  );

    }

    return result;

  }

  /**

   * Normalizes a Windows or Unix Path.

   *

   * Reason: Javas File accepts / or \ for Pathes.

   * Batches or ShellScripts does it not!

   *

   * TODO: implement support for MAC < MacOSX

   *

   * @param destination

   * @param Force a target-system fileseparator

   *

   * @return

   */

  public static String normalizePath( String destination, String fileSeparator )

  {

    String FILESEP = (fileSeparator == null) ? File.separator : fileSeparator;

   destination = StringTool.replace( destination, "\\", "/" );

    //all occs of "//" by "/"

    destination = StringTool.replace( destination, "//", "/" );

    destination = StringTool.replace( destination, ":", ";" );

    destination = StringTool.replace( destination, ";", ":" );

    destination = StringTool.replace( destination, "/",  FILESEP );

    if( "\\".equals( FILESEP ) )

    {

      destination = StringTool.replace( destination, ":", ";" );

      // results in "C;\" instead of "C:\"

      // so correct it:

      destination = StringTool.replace( destination, ";\\", ":\\" );

    }

    //  Convert the file separator characters

    return ( destination );

  }

  /**

   * Normalizes a mixed Windows/Unix Path.

   * Does Only work for Windows or Unix Pathes

   * Reason: Java.File accepts / or \ for Pathes.

   * Batches or ShellScripts does it not!

   *

   * @param A accepted mixed form by java.File like "C:/a/mixed\path\accepted/by\Java"

   *

   * @return the normalized Path

   */

  public static String normalizePath( String destination )

  {

   return( normalizePath( destination, null ) );

  }

}