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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * under the terms of the GNU General Public License version 2 only, as

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 * particular file as subject to the "Classpath" exception as provided

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 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 *

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

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/*

 * This file is available under and governed by the GNU General Public

 * License version 2 only, as published by the Free Software Foundation.

 * However, the following notice accompanied the original version of this

 * file and, per its terms, should not be removed:

 *

 * Copyright (c) 2004 World Wide Web Consortium,

 *

 * (Massachusetts Institute of Technology, European Research Consortium for

 * Informatics and Mathematics, Keio University). All Rights Reserved. This

 * work is distributed under the W3C(r) Software License [1] 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.

 *

 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231

 */

package org.w3c.dom;

/**

 * The <code>CharacterData</code> interface extends Node 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>CharacterData</code>, though <code>Text</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 <code>DOMString</code> interface, 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 CharacterData is done in 16-bit units.

 * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.

 */

public interface CharacterData extends Node {

    /**

     * 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>DOMString</code>. In such cases, the user

     * may call <code>substringData</code> to retrieve the data in

     * appropriately sized pieces.

     * @exception DOMException

     *   DOMSTRING_SIZE_ERR: Raised when it would return more characters than

     *   fit in a <code>DOMString</code> variable on the implementation

     *   platform.

     */

    public String getData()

                            throws DOMException;

    /**

     * 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>DOMString</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.

     */

    public void setData(String data)

                            throws DOMException;

    /**

     * The number of 16-bit units 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.

     */

    public int getLength();

    /**

     * Extracts a range of data from the node.

     * @param offset Start offset of substring to extract.

     * @param count The number of 16-bit units to extract.

     * @return The specified substring. If the sum of <code>offset</code> and

     *   <code>count</code> exceeds the <code>length</code>, then all 16-bit

     *   units to the end of the data are returned.

     * @exception DOMException

     *   INDEX_SIZE_ERR: Raised if the specified <code>offset</code> is

     *   negative or greater than the number of 16-bit units in

     *   <code>data</code>, or if the specified <code>count</code> is

     *   negative.

     *   <br>DOMSTRING_SIZE_ERR: Raised if the specified range of text does

     *   not fit into a <code>DOMString</code>.

     */

    public String substringData(int offset,

                                int count)

                                throws DOMException;

    /**

     * 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>DOMString</code> specified.

     * @param arg The <code>DOMString</code> to append.

     * @exception DOMException

     *   NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

     */

    public void appendData(String arg)

                           throws DOMException;

    /**

     * Insert a string at the specified 16-bit unit offset.

     * @param offset The character offset at which to insert.

     * @param arg The <code>DOMString</code> to insert.

     * @exception DOMException

     *   INDEX_SIZE_ERR: Raised if the specified <code>offset</code> is

     *   negative or greater than the number of 16-bit units in

     *   <code>data</code>.

     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

     */

    public void insertData(int offset,

                           String arg)

                           throws DOMException;

    /**

     * Remove a range of 16-bit units from the node. Upon success,

     * <code>data</code> and <code>length</code> reflect the change.

     * @param offset The offset from which to start removing.

     * @param count The number of 16-bit units to delete. If the sum of

     *   <code>offset</code> and <code>count</code> exceeds

     *   <code>length</code> then all 16-bit units from <code>offset</code>

     *   to the end of the data are deleted.

     * @exception DOMException

     *   INDEX_SIZE_ERR: Raised if the specified <code>offset</code> is

     *   negative or greater than the number of 16-bit units in

     *   <code>data</code>, or if the specified <code>count</code> is

     *   negative.

     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

     */

    public void deleteData(int offset,

                           int count)

                           throws DOMException;

    /**

     * Replace the characters starting at the specified 16-bit unit offset

     * with the specified string.

     * @param offset The offset from which to start replacing.

     * @param count The number of 16-bit units to replace. If the sum of

     *   <code>offset</code> and <code>count</code> exceeds

     *   <code>length</code>, then all 16-bit units 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>DOMString</code> with which the range must be

     *   replaced.

     * @exception DOMException

     *   INDEX_SIZE_ERR: Raised if the specified <code>offset</code> is

     *   negative or greater than the number of 16-bit units in

     *   <code>data</code>, or if the specified <code>count</code> is

     *   negative.

     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

     */

    public void replaceData(int offset,

                            int count,

                            String arg)

                            throws DOMException;

}