/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache\@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 2001, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * $Log: IDOM_CharacterData.hpp,v $
 * Revision 1.1.1.1  2002/02/01 22:21:55  peiyongz
 * sane_include
 *
 * Revision 1.3  2001/06/04 20:44:14  tng
 * IDOM: Comment should say XMLCh instead of DOMString
 *
 * Revision 1.2  2001/05/11 13:25:49  tng
 * Copyright update.
 *
 * Revision 1.1.1.1  2001/04/03 00:14:27  andyh
 * IDOM
 *
 */

#ifndef IDOM_CharacterData_HEADER_GUARD_
#define IDOM_CharacterData_HEADER_GUARD_

#include <xercesc/util/XercesDefs.hpp>
#include <xercesc/idom/IDOM_Node.hpp>


/**
 * The <code>IDOM_CharacterData</code> interface extends Node with a set  of
 * methods for accessing character data in the DOM.
 *
 * For clarity this set is defined here rather than on each class that uses
 * these methods. No DOM objects correspond directly to
 * <code>CharacterData</code>, though <code>Text</code> and others do inherit
 * the interface from it. All <code>offset</code>s in this interface start
 * from 0, and index in terms of Unicode 16 bit storage units.
 */
class CDOM_EXPORT IDOM_CharacterData: public IDOM_Node {

protected:
    IDOM_CharacterData() {};
    IDOM_CharacterData(const IDOM_CharacterData &other) {};
    IDOM_CharacterData & operator = (const IDOM_CharacterData &other) {return *this;};

public:
    /** @name Destructor. */
    //@{
	 /**
	  * Destructor for IDOM_CharacterData.  The object being destroyed
      * is the reference to the Character Data node, not the character
      * data itself.
	  */
    virtual ~IDOM_CharacterData() {};


    //@}

    /** @name Getter functions. */
    //@{
  /**
   * Returns the character data of the node that implements this interface.
   *
   * The DOM implementation may not put arbitrary limits on the amount of data that
   * may be stored in a  <code>CharacterData</code> node. However,
   * implementation limits may  mean that the entirety of a node's data may
   * not fit into a single <code>XMLCh* String</code>. In such cases, the user
   * may call <code>substringData</code> to retrieve the data in
   * appropriately sized pieces.
   * @exception DOMException
   *   NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.
   */
  virtual const XMLCh *     getData() const = 0;
  /**
   * Returns the number of characters that are available through <code>data</code> and
   * the <code>substringData</code> method below.
   *
   * This may have the value
   * zero, i.e., <code>CharacterData</code> nodes may be empty.
   */
  virtual unsigned int       getLength() const = 0;
  /**
   * Extracts a range of data from the node.
   *
   * @param offset Start offset of substring to extract.
   * @param count The number of characters to extract.
   * @return The specified substring. If the sum of <code>offset</code> and
   *   <code>count</code> exceeds the <code>length</code>, then all
   *   characters to the end of the data are returned.
   * @exception DOMException
   *   INDEX_SIZE_ERR: Raised if the specified offset is negative or greater
   *   than the number of characters in <code>data</code>, or if the
   *   specified <code>count</code> is negative.
   */
  virtual const XMLCh *     substringData(unsigned int offset,
                                   unsigned int count) const = 0;
    //@}
    /** @name Functions that set or change data. */
    //@{
  /**
   * Append the string to the end of the character data of the node.
   *
   * Upon success, <code>data</code> provides access to the concatenation of
   * <code>data</code> and the <code>XMLCh* String</code> specified.
   * @param arg The <code>XMLCh* String</code> to append.
   * @exception DOMException
   *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
   */
  virtual void               appendData(const XMLCh *arg) = 0;
  /**
   * Insert a string at the specified character offset.
   *
   * @param offset The character offset at which to insert.
   * @param arg The <code>XMLCh* String</code> to insert.
   * @exception DOMException
   *   INDEX_SIZE_ERR: Raised if the specified offset is negative or greater
   *   than the number of characters in <code>data</code>.
   *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
   */
  virtual void               insertData(unsigned int offset, const  XMLCh *arg) = 0;
  /**
   * Remove a range of characters from the node.
   *
   * Upon success,
   * <code>data</code> and <code>length</code> reflect the change.
   * @param offset The offset from which to remove characters.
   * @param count The number of characters to delete. If the sum of
   *   <code>offset</code> and <code>count</code> exceeds <code>length</code>
   *   then all characters from <code>offset</code> to the end of the data
   *   are deleted.
   * @exception DOMException
   *   INDEX_SIZE_ERR: Raised if the specified offset is negative or greater
   *   than the number of characters in <code>data</code>, or if the
   *   specified <code>count</code> is negative.
   *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
   */
  virtual void               deleteData(unsigned int offset,
                                unsigned int count) = 0;
  /**
   * Replace the characters starting at the specified character offset with
   * the specified string.
   *
   * @param offset The offset from which to start replacing.
   * @param count The number of characters to replace. If the sum of
   *   <code>offset</code> and <code>count</code> exceeds <code>length</code>
   *   , then all characters to the end of the data are replaced (i.e., the
   *   effect is the same as a <code>remove</code> method call with the same
   *   range, followed by an <code>append</code> method invocation).
   * @param arg The <code>XMLCh* String</code> with which the range must be
   *   replaced.
   * @exception DOMException
   *   INDEX_SIZE_ERR: Raised if the specified offset is negative or greater
   *   than the number of characters in <code>data</code>, or if the
   *   specified <code>count</code> is negative.
   *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
   */
  virtual void               replaceData(unsigned int offset,
                                 unsigned int count,
                                 const XMLCh *arg) = 0;

  /**
   * Sets the character data of the node that implements this interface.
   *
   * @param data The <code>XMLCh* String</code> to set.
   */
  virtual void               setData(const XMLCh *data) = 0;
  //@}

};

#endif