code: /*
   * 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.
   */
  /*
   * $Id$
   */
  package org.apache.xpath.objects;
  
  import org.apache.xml.utils.FastStringBuffer;
  import org.apache.xml.utils.XMLString;
  import org.apache.xml.utils.XMLStringFactory;
  
  /**
   * Class XMLStringFactoryImpl creates XString versions of XMLStrings.
   * @xsl.usage internal
   */
  public class XMLStringFactoryImpl extends XMLStringFactory
  {
    /** The XMLStringFactory to pass to DTM construction.   */
    private static XMLStringFactory m_xstringfactory =
      new XMLStringFactoryImpl();
  
    /**
     * Get the XMLStringFactory to pass to DTM construction.
     *
     *
     * @return A never-null static reference to a String factory.
     */
    public static XMLStringFactory getFactory()
    {
      return m_xstringfactory;
    }
  
    /**
     * Create a new XMLString from a Java string.
     *
     *
     * @param string Java String reference, which must be non-null.
     *
     * @return An XMLString object that wraps the String reference.
     */
    public XMLString newstr(String string)
    {
      return new XString(string);
    }
  
    /**
     * Create a XMLString from a FastStringBuffer.
     *
     *
     * @param fsb FastStringBuffer reference, which must be non-null.
     * @param start The start position in the array.
     * @param length The number of characters to read from the array.
     *
     * @return An XMLString object that wraps the FastStringBuffer reference.
     */
    public XMLString newstr(FastStringBuffer fsb, int start, int length)
    {
      return new XStringForFSB(fsb, start, length);
    }
    
    /**
     * Create a XMLString from a FastStringBuffer.
     *
     *
     * @param string FastStringBuffer reference, which must be non-null.
     * @param start The start position in the array.
     * @param length The number of characters to read from the array.
     *
     * @return An XMLString object that wraps the FastStringBuffer reference.
     */
    public XMLString newstr(char[] string, int start, int length)
    {
      return new XStringForChars(string, start, length);
    }
    
    /**
     * Get a cheap representation of an empty string.
     * 
     * @return An non-null reference to an XMLString that represents "".
     */
    public XMLString emptystr()
    {
      return XString.EMPTYSTRING;
    }
  
  }
  