ClickHouse/base/poco/XML/include/Poco/DOM/NodeList.h

//
// NodeList.h
//
// Library: XML
// Package: DOM
// Module:  DOM
//
// Definition of the DOM NodeList interface.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef DOM_NodeList_INCLUDED
#define DOM_NodeList_INCLUDED


#include "Poco/DOM/DOMObject.h"
#include "Poco/XML/XML.h"


namespace Poco
{
namespace XML
{


    class Node;


    class XML_API NodeList : public DOMObject
    /// The NodeList interface provides the abstraction of an ordered
    /// collection of nodes, without defining or constraining how this
    /// collection is implemented.
    ///
    /// The items in the NodeList are accessible via an integral index,
    /// starting from 0.
    ///
    /// A NodeList returned from a method must be released with a call to
    /// release() when no longer needed.
    {
    public:
        virtual Node * item(unsigned long index) const = 0;
        /// Returns the index'th item in the collection. If index is
        /// greater than or equal to the number of nodes in the list,
        /// this returns null.

        virtual unsigned long length() const = 0;
        /// Returns the number of nodes in the list. The range of valid
        /// node indices is 0 to length - 1 inclusive.

    protected:
        virtual ~NodeList();
    };


}
} // namespace Poco::XML


#endif // DOM_NodeList_INCLUDED