mirror of
https://github.com/jezhiggins/arabica
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71 lines
2 KiB
C++
71 lines
2 KiB
C++
#ifndef ARABICA_XML_FILTER_H
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#define ARABICA_XML_FILTER_H
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// XMLFilter.h
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#include <string>
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#include <SAX/ArabicaConfig.hpp>
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#include <SAX/XMLReader.hpp>
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namespace Arabica
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{
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namespace SAX
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{
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/**
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* Interface for an XML filter.
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*
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* <p>An XML filter is like an XML reader, except that it obtains its
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* events from another XML reader rather than a primary source like
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* an XML document or database. Filters can modify a stream of
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* events as they pass on to the final application.</p>
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*
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* <p>The XMLFilterImpl helper class provides a convenient base
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* for creating SAX2 filters, by passing on all {@link EntityResolver
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* EntityResolver}, {@link DTDHandler DTDHandler},
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* {@link ContentHandler ContentHandler} and {@link ErrorHandler
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* ErrorHandler} events automatically.</p>
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*
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* @since SAX 2.0
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* @author Jez Higgins,
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* <a href="mailto:jez@jezuk.co.uk">jez@jezuk.co.uk</a>
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* @version 2.0
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* @see XMLFilterImpl
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*/
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template<class string_type, class string_adaptor_type>
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class XMLFilter : public XMLReaderInterface<string_type, string_adaptor_type>
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{
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public:
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typedef XMLReaderInterface<string_type, string_adaptor_type> XMLReaderT;
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typedef typename XMLReaderT::string_adaptor string_adaptor;
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virtual ~XMLFilter() { }
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/**
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* Set the parent reader.
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*
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* <p>This method allows the application to link the filter to
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* a parent reader (which may be another filter).</p>
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*
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* @param parent The parent reader.
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*/
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virtual void setParent(XMLReaderT& parent) = 0;
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/**
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* Get the parent reader.
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*
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* <p>This method allows the application to query the parent
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* reader (which may be another filter). It is generally a
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* bad idea to perform any operations on the parent reader
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* directly: they should all pass through this filter.</p>
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*
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* @return The parent filter, or 0 if none has been set.
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*/
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virtual XMLReaderT* getParent() const = 0;
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}; // class XMLFilter
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} // namespace SAX
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} // namespace Arabica
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#endif
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// end of file
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