ObjectsTree.h

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#pragma once
 
#include <alib/tree>
#include <core/xmlApi.hpp>
 
namespace core {
 
template < typename T >
struct xmlApi < ext::tree < T > > {
    static ext::tree < T > parse ( ext::deque < sax::Token >::iterator & input );
    static bool first ( const ext::deque < sax::Token >::const_iterator & input );
    static std::string xmlTagName ( );
    static void compose ( ext::deque < sax::Token > & output, const ext::tree < T > & input );
};
 
template < typename T >
ext::tree < T > xmlApi < ext::tree < T > >::parse ( ext::deque < sax::Token >::iterator & input ) {
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::START_ELEMENT, xmlTagName ( ) );
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::START_ELEMENT, "Root" );
 
    ext::tree < T > tree ( core::xmlApi < T >::parse ( input ) );
 
    ext::tree < T > * under = & tree;
 
    unsigned level = 0;
 
    while ( sax::FromXMLParserHelper::isTokenType ( input, sax::Token::TokenType::START_ELEMENT ) ) {
        if ( sax::FromXMLParserHelper::isToken ( input, sax::Token::TokenType::START_ELEMENT, "Children" ) ) {
            sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::START_ELEMENT, "Children" );
 
            if ( level > 0 )
                under = & * std::prev ( under->end ( ) );
 
            ++level;
        }
 
        under->push_back ( core::xmlApi < T >::parse ( input ) );
 
        while ( sax::FromXMLParserHelper::isToken ( input, sax::Token::TokenType::END_ELEMENT, "Children" ) ) {
            sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::END_ELEMENT, "Children" );
 
            under = under->getParent ( );
            --level;
        }
    }
 
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::END_ELEMENT, "Root" );
    sax::FromXMLParserHelper::popToken ( input, sax::Token::TokenType::END_ELEMENT, xmlTagName ( ) );
    return tree;
}
 
template < typename T >
bool xmlApi < ext::tree < T > >::first ( const ext::deque < sax::Token >::const_iterator & input ) {
    return sax::FromXMLParserHelper::isToken ( input, sax::Token::TokenType::START_ELEMENT, xmlTagName ( ) );
}
 
template < typename T >
std::string xmlApi < ext::tree < T > >::xmlTagName ( ) {
    return "Tree";
}
 
template < typename T >
void xmlApi < ext::tree < T > >::compose ( ext::deque < sax::Token > & output, const ext::tree < T > & input ) {
    output.emplace_back ( xmlTagName ( ), sax::Token::TokenType::START_ELEMENT );
    output.emplace_back ( "Root", sax::Token::TokenType::START_ELEMENT );
 
    unsigned level = 0;
 
    for ( typename ext::tree < T >::const_prefix_iterator iter = input.prefix_begin ( ); iter != input.prefix_end ( ); ) {
        while ( iter.getLevel ( ) > level ) {
            output.emplace_back ( "Children", sax::Token::TokenType::START_ELEMENT );
            ++level;
        }
 
        core::xmlApi < T >::compose ( output, * iter );
        ++iter;
 
        while ( iter.getLevel ( ) < level ) {
            output.emplace_back ( "Children", sax::Token::TokenType::END_ELEMENT );
            --level;
        }
    }
 
    output.emplace_back ( "Root", sax::Token::TokenType::END_ELEMENT );
    output.emplace_back ( xmlTagName ( ), sax::Token::TokenType::END_ELEMENT );
}
 
} /* namespace core */