#ifndef DOMCharacterData_HEADER_GUARD_

#define DOMCharacterData_HEADER_GUARD_

/*

 * 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: DOMCharacterData.hpp 568078 2007-08-21 11:43:25Z amassari $

 */

#include <xercesc/util/XercesDefs.hpp>

#include <xercesc/dom/DOMNode.hpp>

XERCES_CPP_NAMESPACE_BEGIN

/**

 * The <code>DOMCharacterData</code> interface extends DOMNode with a set of

 * attributes and methods for accessing character data in the DOM. For

 * clarity this set is defined here rather than on each object that uses

 * these attributes and methods. No DOM objects correspond directly to

 * <code>DOMCharacterData</code>, though <code>DOMText</code> and others do

 * inherit the interface from it. All <code>offsets</code> in this interface

 * start from <code>0</code>.

 * <p>As explained in the DOM spec, text strings in

 * the DOM are represented in UTF-16, i.e. as a sequence of 16-bit units. In

 * the following, the term 16-bit units is used whenever necessary to

 * indicate that indexing on DOMCharacterData is done in 16-bit units.

 * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113'>Document Object Model (DOM) Level 2 Core Specification</a>.

 * @since DOM Level 1

 */

class CDOM_EXPORT DOMCharacterData: public DOMNode {

protected:

    // -----------------------------------------------------------------------

    //  Hidden constructors

    // -----------------------------------------------------------------------

    /** @name Hidden constructors */

    //@{    

    DOMCharacterData() {}

    DOMCharacterData(const DOMCharacterData &other) : DOMNode(other) {}

    //@}

private:

    // -----------------------------------------------------------------------

    // Unimplemented constructors and operators

    // -----------------------------------------------------------------------

    /** @name Unimplemented operators */

    //@{

    DOMCharacterData & operator = (const DOMCharacterData &);

    //@}

public:

    // -----------------------------------------------------------------------

    //  All constructors are hidden, just the destructor is available

    // -----------------------------------------------------------------------

    /** @name Destructor */

    //@{

    /**

     * Destructor

     *

     */

    virtual ~DOMCharacterData() {};

    //@}

    // -----------------------------------------------------------------------

    //  Virtual DOMCharacterData interface

    // -----------------------------------------------------------------------

    /** @name Functions introduced in DOM Level 1 */

    //@{

    // -----------------------------------------------------------------------

    //  Getter methods

    // -----------------------------------------------------------------------

    /**

     * 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>DOMCharacterData</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.

     * @since DOM Level 1

     */

    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.

     * @since DOM Level 1

     */

    virtual XMLSize_t       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.

     * @since DOM Level 1

     */

    virtual const XMLCh *     substringData(XMLSize_t offset,

                                     XMLSize_t count) const = 0;

    // -----------------------------------------------------------------------

    //  String methods

    // -----------------------------------------------------------------------

    /**

     * 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.

     * @since DOM Level 1

     */

    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.

     * @since DOM Level 1

     */

    virtual void               insertData(XMLSize_t 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.

     * @since DOM Level 1

     */

    virtual void               deleteData(XMLSize_t offset,

                                  XMLSize_t 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.

     * @since DOM Level 1

     */

    virtual void               replaceData(XMLSize_t offset,

                                   XMLSize_t 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.

     * @since DOM Level 1

     */

    virtual void               setData(const XMLCh *data) = 0;

    //@}

};

XERCES_CPP_NAMESPACE_END

#endif