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70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
#ifndef XMLFilterH
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#define XMLFilterH
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// XMLFilter.h
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// $Id$
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#include <string>
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#include "XMLReader.h"
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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 basic_EntityResolver
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* EntityResolver}, {@link basic_DTDHandler DTDHandler},
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* {@link basic_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 basic_XMLFilterImpl
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*/
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template<class string_type>
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class basic_XMLFilter : public basic_XMLReader<string_type>
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{
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public:
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typedef string_type stringT;
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typedef basic_XMLReader<stringT> XMLReaderT;
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virtual ~basic_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 basic_XMLFilter
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typedef basic_XMLFilter<std::string> XMLFilter;
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typedef basic_XMLFilter<std::wstring> wXMLFilter;
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}; // namespace SAX
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#endif
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// end of file
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