lemur::retrieval::StructQueryRep Class Reference

Structured query representation. More...

#include <StructQueryRep.hpp>

Inheritance diagram for lemur::retrieval::StructQueryRep:

List of all members.

Public Member Functions
	StructQueryRep (const lemur::api::TermQuery &qry, const lemur::api::Index &dbIndex, double dbelief=0)
	Parse the text representation into a structured query rep.
virtual	~StructQueryRep ()
virtual QueryNode *	topnode () const
virtual void	setTopnode (QueryNode *qn)
	Set the topnode of the query parse tree.
Private Types
typedef QueryNode *(StructQueryRep::*	getFunc )(const lemur::api::TermQuery &, const lemur::api::Term *, double)
	pointer to member function for getting a node.
Private Member Functions
QnList *	getChildren (const lemur::api::TermQuery &qry, getFunc fn, bool weigh=false)
	Parse the text representation of the children of a query node.
QueryNode *	getQryNode (const lemur::api::TermQuery &qry, const lemur::api::Term *tok, double w)
	Parse the text representation of a weighted query node.
QueryNode *	getProxQryNode (const lemur::api::TermQuery &qry, const lemur::api::Term *tok, double w=1.0)
	Parse the text representation of a proximity query node.
Private Attributes
QueryNode *	topNode
	Top node of the query parse tree.
QueryNode *	qStack [100]
	stack of query nodes for parsing nested nodes.
int	topqStack
	index of top of qStack.
double	dw
	default weight.
const lemur::api::Index &	ind
	Our index.
int	numDocs
	number of docs in collection (reduce calls to docCount.

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Detailed Description

Structured query representation.

Converts the textual representation of the structured query into a tree structure of QueryNodes. Constructs the proximity lists and DocInfoLists for the individual nodes, pruning the set of documents that will actually need to be scored.

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Member Typedef Documentation

typedef QueryNode*(StructQueryRep::* lemur::retrieval::StructQueryRep::getFunc)(const lemur::api::TermQuery &, const lemur::api::Term *, double) [private]

pointer to member function for getting a node.

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Constructor & Destructor Documentation

lemur::retrieval::StructQueryRep::StructQueryRep (  const lemur::api::TermQuery &  qry, const lemur::api::Index &  dbIndex, double  dbelief = 0 )

Parse the text representation into a structured query rep.

virtual lemur::retrieval::StructQueryRep::~StructQueryRep (   )  [inline, virtual]

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Member Function Documentation

QnList* lemur::retrieval::StructQueryRep::getChildren (  const lemur::api::TermQuery &  qry, getFunc  fn, bool  weigh = false )  [private]

Parse the text representation of the children of a query node.

QueryNode* lemur::retrieval::StructQueryRep::getProxQryNode (  const lemur::api::TermQuery &  qry, const lemur::api::Term *  tok, double  w = 1.0 )  [private]

Parse the text representation of a proximity query node.

QueryNode* lemur::retrieval::StructQueryRep::getQryNode (  const lemur::api::TermQuery &  qry, const lemur::api::Term *  tok, double  w )  [private]

Parse the text representation of a weighted query node.

virtual void lemur::retrieval::StructQueryRep::setTopnode (  QueryNode *  qn  )  [inline, virtual]

Set the topnode of the query parse tree.

virtual QueryNode* lemur::retrieval::StructQueryRep::topnode (   )  const [inline, virtual]

Get the topnode of the query parse tree. maybe this method should return a const object so it can't be deleted but sometimes we want to allow caller to change node's weight.

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Member Data Documentation

double lemur::retrieval::StructQueryRep::dw [private]

default weight.

const lemur::api::Index& lemur::retrieval::StructQueryRep::ind [private]

Our index.

int lemur::retrieval::StructQueryRep::numDocs [private]

number of docs in collection (reduce calls to docCount.

QueryNode* lemur::retrieval::StructQueryRep::qStack[100] [private]

stack of query nodes for parsing nested nodes.

QueryNode* lemur::retrieval::StructQueryRep::topNode [private]

Top node of the query parse tree.

int lemur::retrieval::StructQueryRep::topqStack [private]

index of top of qStack. This is an accident waiting to happen! dmf

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

• StructQueryRep.hpp

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