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

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


#ifndef DOM_DocumentEvent_INCLUDED
#define DOM_DocumentEvent_INCLUDED


#include "Poco/XML/XML.h"
#include "Poco/XML/XMLString.h"


namespace Poco
{
namespace XML
{


    class Event;


    class XML_API DocumentEvent
    /// The DocumentEvent interface provides a mechanism by which the user can create
    /// an Event of a type supported by the implementation. It is expected that
    /// the DocumentEvent interface will be implemented on the same object which
    /// implements the Document interface in an implementation which supports the
    /// Event model.
    {
    public:
        virtual Event * createEvent(const XMLString & eventType) const = 0;
        /// Creates an event of the specified type.
        ///
        /// The eventType parameter specifies the type of Event interface to be created.
        /// If the Event interface specified is supported by the implementation this
        /// method will return a new Event of the interface type requested. If the Event
        /// is to be dispatched via the dispatchEvent method the appropriate event init
        /// method must be called after creation in order to initialize the Event's
        /// values. As an example, a user wishing to synthesize some kind of UIEvent
        /// would call createEvent with the parameter "UIEvents". The initUIEvent method
        /// could then be called on the newly created UIEvent to set the specific type
        /// of UIEvent to be dispatched and set its context information.
        /// The createEvent method is used in creating Events when it is either inconvenient
        /// or unnecessary for the user to create an Event themselves. In cases where
        /// the implementation provided Event is insufficient, users may supply their
        /// own Event implementations for use with the dispatchEvent method.

    protected:
        virtual ~DocumentEvent();
    };


}
} // namespace Poco::XML


#endif // DOM_DocumentEvent_INCLUDED