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//
// 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/XML/XML.h"
#include "Poco/SAX/SAXParser.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.
void setMaxElementDepth(std::size_t limit);
/// Limits the maximum element depth of the XML document to be loaded.
/// Setting the limit to zero disables the limit.
///
/// This can be used to prevent excessive element depth, which
/// could lead to a stack overflow when destroying the document.
///
/// The default limit is 256.
std::size_t getMaxElementDepth() const;
/// Returns the maximum element depth.
static const XMLString FEATURE_FILTER_WHITESPACE;
enum
{
DEFAULT_MAX_ELEMENT_DEPTH = 256
};
private:
SAXParser _saxParser;
NamePool* _pNamePool;
bool _filterWhitespace = false;
std::size_t _maxElementDepth = DEFAULT_MAX_ELEMENT_DEPTH;
};
} } // namespace Poco::XML
#endif // DOM_DOMParser_INCLUDED
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