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

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


#ifndef DOM_DOMParser_INCLUDED
#define DOM_DOMParser_INCLUDED


#include "Poco/SAX/SAXParser.h"
#include "Poco/XML/XML.h"


namespace Poco
{
namespace XML
{


    class NamePool;
    class Document;
    class InputSource;
    class EntityResolver;


    class XML_API DOMParser
    /// This is a convenience class that combines a
    /// DOMBuilder with a SAXParser, with the optional
    /// support of a WhitespaceFilter.
    {
    public:
        explicit DOMParser(NamePool * pNamePool = 0);
        /// Creates a new DOMParser.
        /// If a NamePool is given, it becomes the Document's NamePool.

        explicit DOMParser(unsigned long namePoolSize);
        /// Creates a new DOMParser, using the given NamePool size.
        ///
        /// The given namePoolSize should be a suitable prime number,
        /// e.g. 251, 509, 1021 or 4093, depending on the expected
        /// size of the document.

        ~DOMParser();
        /// Destroys the DOMParser.

        void setEncoding(const XMLString & encoding);
        /// Sets the encoding used by the parser if no
        /// encoding is specified in the XML document.

        const XMLString & getEncoding() const;
        /// Returns the name of the encoding used by
        /// the parser if no encoding is specified in
        /// the XML document.

        void addEncoding(const XMLString & name, Poco::TextEncoding * pEncoding);
        /// Adds an encoding to the parser.

        void setFeature(const XMLString & name, bool state);
        /// Set the state of a feature.
        ///
        /// If a feature is not recognized by the DOMParser, it is
        /// passed on to the underlying XMLReader.
        ///
        /// The only currently supported feature is
        /// http://www.appinf.com/features/no-whitespace-in-element-content
        /// which, when activated, causes the WhitespaceFilter to
        /// be used.

        bool getFeature(const XMLString & name) const;
        /// Look up the value of a feature.
        ///
        /// If a feature is not recognized by the DOMParser, the
        /// DOMParser queries the underlying SAXParser for the feature.

        Document * parse(const XMLString & uri);
        /// Parse an XML document from a location identified by an URI.

        Document * parse(InputSource * pInputSource);
        /// Parse an XML document from a location identified by an InputSource.

        Document * parseString(const std::string & xml);
        /// Parse an XML document from a string.

        Document * parseMemory(const char * xml, std::size_t size);
        /// Parse an XML document from memory.

        EntityResolver * getEntityResolver() const;
        /// Returns the entity resolver used by the underlying SAXParser.

        void setEntityResolver(EntityResolver * pEntityResolver);
        /// Sets the entity resolver on the underlying SAXParser.

        static const XMLString FEATURE_FILTER_WHITESPACE;

    private:
        SAXParser _saxParser;
        NamePool * _pNamePool;
        bool _filterWhitespace;
    };


}
} // namespace Poco::XML


#endif // DOM_DOMParser_INCLUDED