mirror of
https://github.com/jezhiggins/arabica
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380 lines
12 KiB
C++
380 lines
12 KiB
C++
#ifndef JEZUK_SAX2DOM_PARSER_H
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#define JEZUK_SAX2DOM_PARSER_H
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#include <SAX/XMLReader.h>
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#include <SAX/helpers/DefaultHandler.h>
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#include <SAX/helpers/AttributeTypes.h>
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#include <DOM/Simple/DOMImplementation.h>
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#include <DOM/Simple/NotationImpl.h>
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#include <DOM/Simple/EntityImpl.h>
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#include <DOM/Document.h>
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#include <DOM/DOMException.h>
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#include <DOM/SAX2DOM/DocumentTypeImpl.h>
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#include <map>
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#include <SAX/helpers/FeatureNames.h>
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#include <SAX/helpers/PropertyNames.h>
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#include <SAX/SAXParseException.h>
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namespace SAX2DOM
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{
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template<class stringT,
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class string_adaptorT = Arabica::default_string_adaptor<stringT>,
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class SAX_parser = SAX::XMLReader<stringT, string_adaptorT> >
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class Parser : protected SAX::basic_DefaultHandler<stringT>
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{
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typedef SAX::basic_EntityResolver<stringT> EntityResolverT;
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typedef SAX::basic_ErrorHandler<stringT> ErrorHandlerT;
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typedef SAX::basic_LexicalHandler<stringT> LexicalHandlerT;
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typedef SAX::basic_DeclHandler<stringT> DeclHandlerT;
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typedef SAX::basic_InputSource<stringT> InputSourceT;
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typedef SimpleDOM::EntityImpl<stringT, string_adaptorT> EntityT;
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typedef SimpleDOM::NotationImpl<stringT, string_adaptorT> NotationT;
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typedef SimpleDOM::ElementImpl<stringT, string_adaptorT> ElementT;
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typedef typename SAX::basic_ErrorHandler<stringT>::SAXParseExceptionT SAXParseExceptionT;
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public:
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Parser() :
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entityResolver_(0),
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errorHandler_(0)
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{
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SAX::FeatureNames<stringT, string_adaptorT> fNames;
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features_.insert(std::make_pair(fNames.namespaces, true));
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features_.insert(std::make_pair(fNames.namespace_prefixes, true));
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features_.insert(std::make_pair(fNames.validation, false));
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} // Parser
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void setEntityResolver(EntityResolverT& resolver) { entityResolver_ = &resolver; }
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EntityResolverT* getEntityResolver() const { return entityResolver_; }
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void setErrorHandler(ErrorHandlerT& handler) { errorHandler_ = &handler; }
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ErrorHandlerT* getErrorHandler() const { return errorHandler_; }
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void setFeature(const stringT& name, bool value)
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{
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typename Features::iterator f = features_.find(name);
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if(f == features_.end())
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features_.insert(std::make_pair(name, value));
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else
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f->second = value;
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} // setFeature
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bool getFeature(const stringT& name) const
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{
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typename Features::const_iterator f = features_.find(name);
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if(f == features_.end())
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throw SAX::SAXNotRecognizedException(std::string("Feature not recognized ") + string_adaptorT::asStdString(name));
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return f->second;
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} // getFeature
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bool parse(const stringT& systemId)
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{
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InputSourceT is(systemId);
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return parse(is);
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} // loadDOM
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bool parse(InputSourceT& source)
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{
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SAX::PropertyNames<stringT, string_adaptorT> pNames;
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DOM::DOMImplementation<stringT> di = SimpleDOM::DOMImplementation<stringT, string_adaptorT>::getDOMImplementation();
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document_ = di.createDocument(string_adaptorT::construct_from_utf8(""), string_adaptorT::construct_from_utf8(""), 0);
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currentNode_ = document_;
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inCDATA_ = false;
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inEntity_ = 0;
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SAX_parser parser;
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parser.setContentHandler(*this);
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parser.setErrorHandler(*this);
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if(entityResolver_)
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parser.setEntityResolver(*entityResolver_);
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setParserProperty<LexicalHandlerT>(parser, pNames.lexicalHandler);
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setParserProperty<DeclHandlerT>(parser, pNames.declHandler);
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setParserFeatures(parser);
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try
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{
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parser.parse(source);
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}
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catch(const DOM::DOMException& de)
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{
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document_ = 0;
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if(errorHandler_)
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{
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SAXParseExceptionT pe(de.what());
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errorHandler_->fatalError(pe);
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} // if ...
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} // catch
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return (document_ != 0);
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} // loadDOM
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DOM::Document<stringT> getDocument() const
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{
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return document_;
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} // getDocument
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void reset()
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{
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currentNode_ = 0;
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document_ = 0;
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} // reset
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protected:
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DOM::Node<stringT>& currentNode() { return currentNode_; }
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private:
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// no implementations
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Parser(const Parser&);
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bool operator==(const Parser&) const;
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Parser& operator=(const Parser&);
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// instance variables
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DOM::Document<stringT> document_;
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DocumentType<stringT, string_adaptorT >* documentType_;
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DOM::Node<stringT> currentNode_;
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DOM::Node<stringT> cachedCurrent_;
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typedef std::map<stringT, bool> Features;
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Features features_;
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bool inCDATA_;
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int inEntity_;
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std::map<stringT, EntityT*> declaredEntities_;
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EntityResolverT* entityResolver_;
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ErrorHandlerT* errorHandler_;
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SAX::AttributeTypes<stringT, string_adaptorT> attributeTypes_;
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protected:
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template<class interfaceT>
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void setParserProperty(SAX_parser& parser, const stringT& propertyName)
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{
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try {
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#ifndef __BORLANDC__
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// this line causes a crash with BCB 6 => may be a compiler bug
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parser.setProperty(propertyName, static_cast<interfaceT&>(*this));
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#else
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parser.setProperty(propertyName, *(interfaceT*)this);
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#endif
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} // try
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catch(SAX::SAXException&) { }
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} // setParserProperty
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void setParserFeatures(SAX_parser& parser) const
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{
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for(typename Features::const_iterator f = features_.begin(), e = features_.end(); f != e; ++f)
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try {
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parser.setFeature(f->first, f->second);
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}
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catch(const SAX::SAXException&) { }
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} // setParserFeatures
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///////////////////////////////////////////////////////////
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// ContentHandler
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virtual void endDocument()
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{
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currentNode_ = 0;
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} // endDocument
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virtual void startElement(const stringT& namespaceURI, const stringT& localName,
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const stringT& qName, const SAX::basic_Attributes<stringT>& atts)
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{
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if(currentNode_ == 0)
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return;
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try
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{
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DOM::Element<stringT> elem = document_.createElementNS(namespaceURI, qName);
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currentNode_.appendChild(elem);
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// attributes here
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for(int i = 0; i < atts.getLength(); ++i)
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{
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stringT qName = atts.getQName(i);
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if(string_adaptorT::empty(qName))
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qName = atts.getLocalName(i);
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elem.setAttributeNS(atts.getURI(i), qName, atts.getValue(i));
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}
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currentNode_ = elem;
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}
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catch(const DOM::DOMException& de)
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{
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reset();
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if(errorHandler_)
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{
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SAXParseExceptionT pe(de.what());
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errorHandler_->fatalError(pe);
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} // if ...
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} // catch
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} // startElement
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virtual void endElement(const stringT& namespaceURI, const stringT& localName,
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const stringT& qName)
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{
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if(currentNode_ == 0)
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return;
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currentNode_ = currentNode_.getParentNode();
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} // endElement
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virtual void characters(const stringT& ch)
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{
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if(currentNode_ == 0)
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return;
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if(!inCDATA_)
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currentNode_.appendChild(document_.createTextNode(ch));
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else
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currentNode_.appendChild(document_.createCDATASection(ch));
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} // characters
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virtual void processingInstruction(const stringT& target, const stringT& data)
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{
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if(currentNode_ == 0)
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return;
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currentNode_.appendChild(document_.createProcessingInstruction(target, data));
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} // processingInstruction
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virtual void skippedEntity(const stringT& name)
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{
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if(currentNode_ == 0)
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return;
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currentNode_.appendChild(document_.createEntityReference(name));
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} // skippedEntity
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////////////////////////////////////////////////////
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// ErrorHandler
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virtual void warning(const SAXParseExceptionT& e)
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{
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if(errorHandler_)
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errorHandler_->warning(e);
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} // warning
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virtual void error(const SAXParseExceptionT& e)
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{
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if(errorHandler_)
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errorHandler_->error(e);
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reset();
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} // error
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virtual void fatalError(const SAXParseExceptionT& e)
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{
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if(errorHandler_)
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errorHandler_->fatalError(e);
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reset();
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} // fatalError
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/////////////////////////////////////////////////////
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// LexicalHandler
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virtual void startDTD(const stringT& name, const stringT& publicId, const stringT& systemId)
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{
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documentType_ = new DocumentType<stringT, string_adaptorT >(name, publicId, systemId);
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document_.insertBefore(documentType_, 0);
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} // startDTD
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virtual void endDTD()
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{
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documentType_->setReadOnly(true);
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} // endDTD
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virtual void startEntity(const stringT& name)
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{
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if(currentNode_ == 0)
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return;
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if(++inEntity_ == 1)
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{
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cachedCurrent_ = currentNode_;
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currentNode_ = declaredEntities_[name];
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if(currentNode_ != 0 && currentNode_.hasChildNodes() == true) // already populated
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currentNode_ = 0;
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}
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} // startEntity
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virtual void endEntity(const stringT& name)
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{
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if(--inEntity_ == 0)
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currentNode_ = cachedCurrent_;
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currentNode_.appendChild(document_.createEntityReference(name));
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} // endEntity
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virtual void startCDATA()
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{
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inCDATA_ = true;
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} // startCDATA
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virtual void endCDATA()
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{
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inCDATA_ = false;
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} // endCDATA
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virtual void comment(const stringT& text)
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{
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if(currentNode_ == 0)
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return;
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currentNode_.appendChild(document_.createComment(text));
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} // comment
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//////////////////////////////////////////////////////////////////////
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// DeclHandler
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virtual void elementDecl(const stringT& name, const stringT& model)
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{
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documentType_->addElement(name);
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} // elementDecl
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virtual void attributeDecl(const stringT& elementName,
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const stringT& attributeName,
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const stringT& type,
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const stringT& valueDefault,
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const stringT& value)
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{
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if(!string_adaptorT::empty(value))
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documentType_->addDefaultAttr(elementName, attributeName, value);
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if(type == attributeTypes_.id)
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documentType_->addElementId(attributeName);
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} // attributeDecl
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virtual void internalEntityDecl(const stringT& name, const stringT& value)
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{
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EntityT* entity = new EntityT(0, name, string_adaptorT::construct_from_utf8(""), string_adaptorT::construct_from_utf8(""), string_adaptorT::construct_from_utf8(""));
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declaredEntities_.insert(std::make_pair(name, entity));
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documentType_->addEntity(entity);
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DOM::Node<stringT> n = entity;
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n.appendChild(document_.createTextNode(value));
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} // internalEntityDecl
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virtual void externalEntityDecl(const stringT& name, const stringT& publicId, const stringT& systemId)
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{
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EntityT* entity = new EntityT(0, name, publicId, systemId, string_adaptorT::construct_from_utf8(""));
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declaredEntities_.insert(std::make_pair(name, entity)); // we'll populate it later
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documentType_->addEntity(entity);
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} // externalEntityDecl
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/////////////////////////////////////////////////////////////////////////
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// DTDHandler
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virtual void notationDecl(const stringT& name, const stringT& publicId, const stringT& systemId)
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{
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documentType_->addNotation(new NotationT(0, name, publicId, systemId));
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} // notationDecl
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virtual void unparsedEntityDecl(const stringT& name, const stringT& publicId, const stringT& systemId, const stringT& notationName)
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{
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documentType_->addEntity(new EntityT(0, name, publicId, systemId, notationName));
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} // unparsedEntityDecl
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}; // class Parser
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} // namespace
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#endif
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