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differencing of docx files

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/*
 * This file is part of the DiffX library.
 *
 * For licensing information please see the file license.txt included in the release.
 * A copy of this licence can also be found at
 *   http://www.opensource.org/licenses/artistic-license-2.0.php
 */
package com.topologi.diffx.xml.esc;

/**
 * Factory for XML escape classes.
 * 
 * @author Christophe Lauret
 * @version 7 March 2005
 */
public final class XMLEscapeFactory {

  /**
   * Prevents creation of instances.
   */
  private XMLEscapeFactory() {
  }

  /**
   * Returns an instance of a XML Escape based on the given encoding.
   * 
   * This method returns null if the encoding is not supported.
   *
   * @param encoding The encoding for which an escape implementation is requested.
   *
   * @return A XMLEscape instance corresponding to the specified encoding
   *         or null.
   */
  public static XMLEscape getInstance(String encoding) {
    if ("utf-8".equals(encoding)) return XMLEscapeUTF8.UTF8_ESCAPE;
    if ("UTF-8".equals(encoding)) return XMLEscapeUTF8.UTF8_ESCAPE;
    if ("ASCII".equals(encoding)) return XMLEscapeASCII.ASCII_ESCAPE;
    else return null;
  }

}