CQueryParadigmMatcher Class Reference

#include <CQueryParadigmMatcher.h>

List of all members.

Public Member Functions
bool	operator() (const CXMLElement &inQuery, const CXMLElement &inResult) const
Protected Member Functions
bool	matches (const CXMLElement &inQuery, const CXMLElement &inResult) const

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Detailed Description

A class for checking if the content of two query-paradigm tags matches

Definition at line 35 of file CQueryParadigmMatcher.h.

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Member Function Documentation

bool CQueryParadigmMatcher::matches	(	const CXMLElement &	inQuery,
		const CXMLElement &	inResult
	)			const [protected]

Two XMLElements of type query-paradigm match, if the intersection of their attribute sets is identical.

I.e.: If inQuery contains <query-paradigm a1="x" a2=y" />, inResult with <query-paradigm a1="x" a3="z" /> would match, because the intersection {a1,a2} {a1,a2} of the attribute sets is <query-paradigm a1="x" /> and <query-paradigm a1="x"/> for both inQuery and inResult.

<query-paradigm a1="x"/> <query-paradigm a2="x"/>

would also match (the intersection of {a1} and {a2} is empty)

<query-paradigm a1="x" a3="x" /> <query-paradigm a1="y" />

would not (the intersection of {a1,a3} and {a1} is non-empty, but the values in the two tags are differen)

Definition at line 26 of file CQueryParadigmMatcher.cc.

References CXMLElement::createNamedValueList(), CXMLElement::getNumberOfAttributes(), and CXMLElement::stringReadAttribute().

Referenced by operator()().

                                                                                              {
  const CXMLElement* lQuery(&inQuery);
  const CXMLElement* lResult(&inResult);
  
  //as the relation we are describing is symmetric,
  //we permit ourselves to swap things in a way, that
  //processing time is minimal
  if(lQuery->getNumberOfAttributes() > lResult->getNumberOfAttributes()){
    swap(lQuery,lResult);
  }

  list<pair<string,string> >* lQueryAttributes(lQuery->createNamedValueList());

  bool lMatches(true);

  for(list<pair<string,string> >::const_iterator i=lQueryAttributes->begin();
      lMatches && (i!=lQueryAttributes->end());
      i++){
    // get the query attribute in the result element
    pair<bool,string> lAttribute(lResult->stringReadAttribute(i->first));
    // they match, unless
    // the query attribute exsists in the result element
    // and the attribute values differ between query and result
    if(lAttribute.first 
       && (lAttribute.second != i->second)){
      lMatches=false;
    }
  }

  delete lQueryAttributes;

  return lMatches;
}

bool CQueryParadigmMatcher::operator()	(	const CXMLElement &	inQuery,
		const CXMLElement &	inResult
	)			const

This function gives back, if the inQuery matches inResult.

Both parameters are elements of type query-paradigm-list

inQuery matches inResult, if one of the children (a query paradigm) of inQuery matches one of the children (also a query paradigm) of inResult.

Definition at line 60 of file CQueryParadigmMatcher.cc.

References CXMLElement::child_list_begin(), CXMLElement::child_list_end(), CXMLElement::getName(), matches(), and mrml_const::query_paradigm_list.

                                                                                                 {
  
  // nothing matches everything
  if(!(&inQuery) || !(&inResult)){
    return true;
  }
  if((inQuery.getName()==mrml_const::query_paradigm_list)
     &&
     (inQuery.getName()==mrml_const::query_paradigm_list)){
    for(list<CXMLElement*>::const_iterator i=inQuery.child_list_begin();
  i!=inQuery.child_list_end();
  i++){
      for(list<CXMLElement*>::const_iterator j=inResult.child_list_begin();
  j!=inResult.child_list_end();
  j++){
  if(matches(**i,**j)){
    return true;
  }
      }
    };
  }
  return false;
};

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The documentation for this class was generated from the following files:

• gift/libMRML/include/CQueryParadigmMatcher.h
• gift/libMRML/cc/CQueryParadigmMatcher.cc