domnode.hpp

基于属性证书的访问控制源代码,由c++编写,包括openssl,xercesc等

#ifndef DOMNode_HEADER_GUARD_
#define DOMNode_HEADER_GUARD_

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2002 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,
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 * 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/>.
 */

/*
 * $Id: DOMNode.hpp,v 1.15 2003/05/05 21:21:15 neilg Exp $
 */

#include <xercesc/util/XercesDefs.hpp>

XERCES_CPP_NAMESPACE_BEGIN


class DOMDocument;
class DOMNamedNodeMap;
class DOMNodeList;
class DOMUserDataHandler;

/**
 * The <code>DOMNode</code> interface is the primary datatype for the entire
 * Document Object Model. It represents a single node in the document tree.
 * While all objects implementing the <code>DOMNode</code> interface expose
 * methods for dealing with children, not all objects implementing the
 * <code>DOMNode</code> interface may have children. For example,
 * <code>DOMText</code> nodes may not have children, and adding children to
 * such nodes results in a <code>DOMException</code> being raised.
 * <p>The attributes <code>nodeName</code>, <code>nodeValue</code> and
 * <code>attributes</code> are included as a mechanism to get at node
 * information without casting down to the specific derived interface. In
 * cases where there is no obvious mapping of these attributes for a
 * specific <code>nodeType</code> (e.g., <code>nodeValue</code> for an
 * <code>DOMElement</code> or <code>attributes</code> for a <code>DOMComment</code>
 * ), this returns <code>null</code>. Note that the specialized interfaces
 * may contain additional and more convenient mechanisms to get and set the
 * relevant information.
 * <p>The values of <code>nodeName</code>,
 * <code>nodeValue</code>, and <code>attributes</code> vary according to the
 * node type as follows:
 * <table border='1'>
 * <tr>
 * <td>Interface</td>
 * <td>nodeName</td>
 * <td>nodeValue</td>
 * <td>attributes</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMAttr</td>
 * <td valign='top' rowspan='1' colspan='1'>name of
 * attribute</td>
 * <td valign='top' rowspan='1' colspan='1'>value of attribute</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMCDATASection</td>
 * <td valign='top' rowspan='1' colspan='1'><code>"#cdata-section"</code></td>
 * <td valign='top' rowspan='1' colspan='1'>
 * content of the CDATA Section</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMComment</td>
 * <td valign='top' rowspan='1' colspan='1'><code>"#comment"</code></td>
 * <td valign='top' rowspan='1' colspan='1'>content of
 * the comment</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMDocument</td>
 * <td valign='top' rowspan='1' colspan='1'><code>"#document"</code></td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMDocumentFragment</td>
 * <td valign='top' rowspan='1' colspan='1'>
 * <code>"#document-fragment"</code></td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMDocumentType</td>
 * <td valign='top' rowspan='1' colspan='1'>document type name</td>
 * <td valign='top' rowspan='1' colspan='1'>
 * null</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMElement</td>
 * <td valign='top' rowspan='1' colspan='1'>tag name</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * <td valign='top' rowspan='1' colspan='1'>NamedNodeMap</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMEntity</td>
 * <td valign='top' rowspan='1' colspan='1'>entity name</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMEntityReference</td>
 * <td valign='top' rowspan='1' colspan='1'>name of entity referenced</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMNotation</td>
 * <td valign='top' rowspan='1' colspan='1'>notation name</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * <td valign='top' rowspan='1' colspan='1'>
 * null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMProcessingInstruction</td>
 * <td valign='top' rowspan='1' colspan='1'>target</td>
 * <td valign='top' rowspan='1' colspan='1'>entire content excluding the target</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * <tr>
 * <td valign='top' rowspan='1' colspan='1'>DOMText</td>
 * <td valign='top' rowspan='1' colspan='1'>
 * <code>"#text"</code></td>
 * <td valign='top' rowspan='1' colspan='1'>content of the text node</td>
 * <td valign='top' rowspan='1' colspan='1'>null</td>
 * </tr>
 * </table>
 * <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 DOMNode {
protected:
    // -----------------------------------------------------------------------
    //  Hidden constructors
    // -----------------------------------------------------------------------
    /** @name Hidden constructors */
    //@{    
    DOMNode() {};
    //@}

private:    
    // -----------------------------------------------------------------------
    // Unimplemented constructors and operators
    // -----------------------------------------------------------------------
    /** @name Unimplemented constructors and operators */
    //@{
    DOMNode(const DOMNode &);
    DOMNode & operator = (const DOMNode &);
    //@}

public:
    // -----------------------------------------------------------------------
    //  All constructors are hidden, just the destructor is available
    // -----------------------------------------------------------------------
    /** @name Destructor */
    //@{
    /**
     * Destructor
     *
     */
    virtual ~DOMNode() {};
    //@}

    // -----------------------------------------------------------------------
    //  Class Types
    // -----------------------------------------------------------------------
    /** @name Public Contants */
    //@{
    /**
     * NodeType
     *
     * @since DOM Level 1
     */
    enum NodeType {
        ELEMENT_NODE                = 1,
        ATTRIBUTE_NODE              = 2,
        TEXT_NODE                   = 3,
        CDATA_SECTION_NODE          = 4,
        ENTITY_REFERENCE_NODE       = 5,
        ENTITY_NODE                 = 6,
        PROCESSING_INSTRUCTION_NODE = 7,
        COMMENT_NODE                = 8,
        DOCUMENT_NODE               = 9,
        DOCUMENT_TYPE_NODE          = 10,
        DOCUMENT_FRAGMENT_NODE      = 11,
        NOTATION_NODE               = 12
    };

    /**
     * TreePosition:
     *
     * <p><b>"Experimental - subject to change"</b></p>
     *
     * <p><code>TREE_POSITION_PRECEDING:</code>
     * The node precedes the reference node.</p>
     * <p><code>TREE_POSITION_FOLLOWING:</code>
     * The node follows the reference node.</p>
     * <p><code>TREE_POSITION_ANCESTOR:</code>
     * The node is an ancestor of the reference node.</p>
     * <p><code>TREE_POSITION_DESCENDANT:</code>
     * The node is a descendant of the reference node.</p>
     * <p><code>TREE_POSITION_EQUIVALENT:</code>
     * The two nodes have an equivalent position. This is the case of two
     * attributes that have the same <code>ownerElement</code>, and two
     * nodes that are the same.</p>
     * <p><code>TREE_POSITION_SAME_NODE:</code>
     * The two nodes are the same. Two nodes that are the same have an
     * equivalent position, though the reverse may not be true.</p>
     * <p><code>TREE_POSITION_DISCONNECTED:</code>
     * The two nodes are disconnected, they do not have any common ancestor.
     * This is the case of two nodes that are not in the same document.</p>
     *
     * @since DOM Level 3
     */
    enum DOMTreePosition {
        TREE_POSITION_PRECEDING   = 0x01,
        TREE_POSITION_FOLLOWING   = 0x02,
        TREE_POSITION_ANCESTOR    = 0x04,
        TREE_POSITION_DESCENDANT  = 0x08,
        TREE_POSITION_EQUIVALENT  = 0x10,
        TREE_POSITION_SAME_NODE   = 0x20,
        TREE_POSITION_DISCONNECTED = 0x00
    };
    //@}

    // -----------------------------------------------------------------------
    //  Virtual DOMNode interface
    // -----------------------------------------------------------------------
    /** @name Functions introduced in DOM Level 1 */
    //@{
    // -----------------------------------------------------------------------
    //  Getter methods
    // -----------------------------------------------------------------------
    /**
     * The name of this node, depending on its type; see the table above.
     * @since DOM Level 1
     */
    virtual const XMLCh *   getNodeName() const = 0;

    /**
     * Gets the value of this node, depending on its type.
     *
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.
     * @since DOM Level 1
     */
    virtual const XMLCh *       getNodeValue() const = 0;

    /**
     * An enum value representing the type of the underlying object.
     * @since DOM Level 1
     */
    virtual short           getNodeType() const = 0;

    /**
     * Gets the parent of this node.
     *
     * All nodes, except <code>DOMDocument</code>,
     * <code>DOMDocumentFragment</code>, and <code>DOMAttr</code> may have a parent.
     * However, if a node has just been created and not yet added to the tree,
     * or if it has been removed from the tree, a <code>null</code> DOMNode
     * is returned.
     * @since DOM Level 1
     */
    virtual DOMNode        *getParentNode() const = 0;

    /**
     * Gets a <code>DOMNodeList</code> that contains all children of this node.
     *
     * If there
     * are no children, this is a <code>DOMNodeList</code> containing no nodes.
     * The content of the returned <code>DOMNodeList</code> is "live" in the sense
     * that, for instance, changes to the children of the node object that
     * it was created from are immediately reflected in the nodes returned by
     * the <code>DOMNodeList</code> accessors; it is not a static snapshot of the
     * content of the node. This is true for every <code>DOMNodeList</code>,
     * including the ones returned by the <code>getElementsByTagName</code>
     * method.
     * @since DOM Level 1
     */
    virtual DOMNodeList    *getChildNodes() const = 0;
    /**
     * Gets the first child of this node.
     *
     * If there is no such node, this returns <code>null</code>.
     * @since DOM Level 1
     */
    virtual DOMNode        *getFirstChild() const = 0;