CQueryParser Class Reference

#include <QueryParser.h>

Collaboration diagram for CQueryParser:

List of all members.

Public Member Functions

• CQueryParser (const CConcHolder *pHolder)

  default constructor
  

• virtual ~CQueryParser ()

  default destructor
  

• void CleanParser ()

  make this parse ready for the new call of CQueryParser::ParseQuery
  

• bool ParseQueryOperators (const string &OperatorName, const string &Arguments, CDDCFilterWithBounds &Filter)

  parse a level value for a DDC filter
  

• bool ParseSortAndFilterOperators (string &QueryStr)

  parse sort and filter operators from QueryStr (and delete these operators)
  

• int yyqlex (void *valp)

  wrapper for yywrap() [required]
  

• const char * yytext (void) const
• int yyleng (void) const
• void DeleteTree ()

  delete parse tree ( CQueryParser::m_pQueryTree )
  

• bool ParseQuery (const char *query_src)

  parse "query_src" and build a parse tree for it
  

• bool Evaluate ()

  evaluate parse tree bottom-up
  

• int GetNewNodeIndex ()
• size_t GetNodeIndicesCount () const

Public Attributes

• int m_CurrentNodeIndex
• string m_HitTypeStr

  the break collection name which should be used while querying
  

• int m_TextAreaNo

  the index of text area where DDC should perform the input query
  

• vector< CDDCFilterWithBounds > m_Filters

  filters and sort operators which should be applied to the resulted hit set
  

• size_t m_ContextSentencesCount

  how many hits of the left and right context should be output
  

• CQueryNode * m_pQueryTree

  the top of the parse tree
  

• const CConcHolder * m_pHolder

  a reference to the holder, for which this query is parsed
  

• list< string > m_Labels

  a special slot for YACC (which contains all string leaves of the parse tree)
  

• vector< const CQueryNode * > m_CurrSequenceObj

  a special slot for YACC (which contains the current queue of nodes inside a sequence operator )
  

• vector< string > m_CurrDistances

  a special slot for YACC (which contains the current queue of text distances between nodes inside a sequence operator )
  

• bool m_bEnableBibliographyForThisQuery
• bool m_bDebugRank
• BigramDirectionEnum m_BigramsUse

  if left is specified, then m_BigramsUse is bdLeftBigram, if right, then m_BigramsUse is bdRightBigram, otherwize bdDontUseBigrams
  

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Detailed Description

CQueryParser is a class fo the parse tree of the input query and its general properties. Rewritten (Tue, 17 May 2011 11:48:20 +0200 moo) to use C-style flex reentrant scanner.

Formerly descended from FlexLexer (abstract class of flex tool), so it should implement also flex parser's functionality (DDC uses YACC in thread-safe mode)

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Constructor & Destructor Documentation

CQueryParser::CQueryParser

(

const CConcHolder *

pHolder

)

default constructor

References m_bDebugRank, m_bEnableBibliographyForThisQuery, m_ContextSentencesCount, m_CurrentNodeIndex, and m_pHolder.

CQueryParser::~CQueryParser

(

)

[virtual]

default destructor

References CleanParser().

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Member Function Documentation

void CQueryParser::CleanParser

(

)

make this parse ready for the new call of CQueryParser::ParseQuery

References DeleteTree(), m_CurrDistances, m_CurrentNodeIndex, m_CurrSequenceObj, m_Filters, and m_Labels.

Referenced by ParseQuery(), and ~CQueryParser().

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bool CQueryParser::ParseQueryOperators	(	const string &	OperatorName,
		const string &	Arguments,
		CDDCFilterWithBounds &	Filter
	)

parse a level value for a DDC filter

References CBibliography::ConvertDateToInt(), CConcIndexator::GetRegexOptions(), CConcXml::GetValueFromBiblSet(), GreaterByFreeBiblField, CConcIndexator::m_Bibl, m_BigramsUse, CBibliography::m_DateStr, CDDCFilterWithBounds::m_FilterType, CDDCFilterWithBounds::m_FreeBiblAttribName, CDDCFilterWithBounds::m_LevelEnd, CDDCFilterWithBounds::m_LevelStart, m_pHolder, CConcHolder::m_pIndexator, CDDCFilterWithBounds::m_SatisfiedValues, and Trim().

Referenced by ParseSortAndFilterOperators().

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bool CQueryParser::ParseSortAndFilterOperators

(

string &

QueryStr

)

parse sort and filter operators from QueryStr (and delete these operators)

References m_BigramsUse, m_Filters, NoSort, ParseQueryOperators(), SortOperators, SortOperatorsCount, and Trim().

Referenced by ParseQuery().

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int CQueryParser::yyqlex

(

void *

valp

)

wrapper for yywrap() [required]

wrapper for underlying flex scanner yylex() : do NOT declare this here: it's already declared in FlexLexer.h ! wrapper for yylex() as called from bison parser (valp is a YYSTYPE*)

References m_Labels, REGEX, SYMBOL, yyleng(), yylex, and yytext().

Referenced by yyqlex().

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const char* CQueryParser::yytext

(

void

)

const [inline]

Referenced by yyqlex().

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int CQueryParser::yyleng

(

void

)

const [inline]

Referenced by yyqlex().

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void CQueryParser::DeleteTree

(

)

delete parse tree ( CQueryParser::m_pQueryTree )

References m_pQueryTree.

Referenced by CleanParser(), CConcHolder::GetAllHits(), and CConcHolder::GetOccurrences().

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bool CQueryParser::ParseQuery

(

const char *

query_src

)

parse "query_src" and build a parse tree for it

References CleanParser(), ContextStarter, ContextStarterLower, CConcIndexator::HasContextOperator(), m_bDebugRank, m_bEnableBibliographyForThisQuery, CConcIndexator::m_Bibl, m_ContextSentencesCount, m_HitTypeStr, m_pHolder, CConcHolder::m_pIndexator, m_TextAreaNo, ParseSortAndFilterOperators(), CHitBorders::ProcessHitTypeStrInQueryStr(), CConcXml::ProcessTextAreaNoInQueryStr(), Trim(), yyqdebug, and yyqparse().

Referenced by CConcHolder::GetHits(), and CConcHolder::GetOccurrences().

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bool CQueryParser::Evaluate

(

)

evaluate parse tree bottom-up

References CQueryNode::Evaluate(), and m_pQueryTree.

Referenced by CConcHolder::GetAllHits().

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int CQueryParser::GetNewNodeIndex

(

)

References m_CurrentNodeIndex.

size_t CQueryParser::GetNodeIndicesCount

(

)

const

References m_CurrentNodeIndex.

Referenced by CConcHolder::InitLessByRank().

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Member Data Documentation

int CQueryParser::m_CurrentNodeIndex

Referenced by CleanParser(), CQueryParser(), GetNewNodeIndex(), and GetNodeIndicesCount().

string CQueryParser::m_HitTypeStr

the break collection name which should be used while querying

Referenced by CConcHolder::GenerateHitStrings(), CConcHolder::GetContext(), CConcHolder::GetContextJson(), ParseQuery(), and CConcHolder::SetHitType().

int CQueryParser::m_TextAreaNo

the index of text area where DDC should perform the input query

Referenced by CConcHolder::GetTextArea(), ParseQuery(), and CConcHolder::SetHitType().

vector<CDDCFilterWithBounds> CQueryParser::m_Filters

filters and sort operators which should be applied to the resulted hit set

Referenced by CleanParser(), CConcHolder::GetAllHits(), CConcHolder::HasRankOrderOperator(), CConcHolder::HitsShouldBeSorted(), and ParseSortAndFilterOperators().

size_t CQueryParser::m_ContextSentencesCount

how many hits of the left and right context should be output

Referenced by CQueryParser(), CConcHolder::GenerateOneHitString(), CConcHolder::GenerateOneHitStringJson(), and ParseQuery().

CQueryNode* CQueryParser::m_pQueryTree

the top of the parse tree

Referenced by DeleteTree(), Evaluate(), CConcHolder::GetAllHits(), CConcHolder::GetOccurrences(), CConcHolder::InitGreaterByRank(), CConcHolder::InitGreaterBySize(), CConcHolder::InitLessByBigrams(), CConcHolder::InitLessByRank(), CConcHolder::InitLessBySize(), and CConcHolder::InitOrderIDForHits().

const CConcHolder* CQueryParser::m_pHolder

a reference to the holder, for which this query is parsed

Referenced by CQueryParser(), ParseQuery(), and ParseQueryOperators().

list<string> CQueryParser::m_Labels

a special slot for YACC (which contains all string leaves of the parse tree)

Referenced by CleanParser(), and yyqlex().

vector<const CQueryNode*> CQueryParser::m_CurrSequenceObj

a special slot for YACC (which contains the current queue of nodes inside a sequence operator )

Referenced by CleanParser().

vector<string> CQueryParser::m_CurrDistances

a special slot for YACC (which contains the current queue of text distances between nodes inside a sequence operator )

Referenced by CleanParser().

bool CQueryParser::m_bEnableBibliographyForThisQuery

Referenced by CQueryParser(), CConcHolder::GenerateOneHitString(), and ParseQuery().

bool CQueryParser::m_bDebugRank

Referenced by CQueryParser(), CConcHolder::GenerateOneHitString(), CConcHolder::GenerateOneHitStringJson(), CConcHolder::InitLessByRank(), and ParseQuery().

BigramDirectionEnum CQueryParser::m_BigramsUse

if left is specified, then m_BigramsUse is bdLeftBigram, if right, then m_BigramsUse is bdRightBigram, otherwize bdDontUseBigrams

Referenced by CConcHolder::GetBigramsToOrder(), ParseQueryOperators(), and ParseSortAndFilterOperators().

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

• QueryParser.h
• QueryParser.cpp