CQueryNearNode Class Reference

CQueryNearNode is a class which is used to search two or three nodes, which are inside some text period of length CQueryNearNode::m_Distance. It other words it is an implementation of "near" operator: for example, NEAR(a,b,2). More...

#include <QueryNode.h>

Inheritance diagram for CQueryNearNode:

Collaboration diagram for CQueryNearNode:

List of all members.

Public Member Functions

• CQueryNearNode ()
• virtual ~CQueryNearNode ()
• bool Create (const CConcHolder *pHolder, const char *distance_str, CQueryNode *child1, CQueryNode *child2, CQueryNode *child3=0)

  create the node during yacc parsing
  

• void Evaluate ()
• size_t GetNodeFrequenceByNodeIndex (size_t NodeIndex) const

Private Member Functions

• bool ReadDistanceFromString (const char *s)

  read the text distance from a string, return false if it is to large
  

Private Attributes

• CQueryNode * m_pChild1

  the first child
  

• CQueryNode * m_pMiddleChild

  the middle child (can be null)
  

• CQueryNode * m_pChild2

  the second child
  

• BYTE m_Distance

  the distance between the first child and the second child
  

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Detailed Description

CQueryNearNode is a class which is used to search two or three nodes, which are inside some text period of length CQueryNearNode::m_Distance. It other words it is an implementation of "near" operator: for example, NEAR(a,b,2).

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Constructor & Destructor Documentation

CQueryNearNode::CQueryNearNode

(

)

References m_pChild1, m_pChild2, and m_pMiddleChild.

CQueryNearNode::~CQueryNearNode

(

)

[virtual]

References m_pChild1, m_pChild2, and m_pMiddleChild.

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Member Function Documentation

bool CQueryNearNode::ReadDistanceFromString

(

const char *

s

)

[private]

read the text distance from a string, return false if it is to large

References m_Distance, and MaxDistanceForNear.

Referenced by Create().

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bool CQueryNearNode::Create	(	const CConcHolder *	pHolder,
		const char *	distance_str,
		CQueryNode *	child1,
		CQueryNode *	child2,
		CQueryNode *	child3 = 0
	)

create the node during yacc parsing

References CQueryNode::m_bAtomic, m_pChild1, m_pChild2, m_pMiddleChild, ReadDistanceFromString(), and CQueryNode::SetHolder().

Referenced by yyqparse().

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void CQueryNearNode::Evaluate

(

)

[virtual]

Reimplemented from CQueryNode.

References CQueryNode::AddOccurrences(), CQueryNode::ClearAndReserveOccurrences(), CQueryNode::ConvertOccurrencesToHitsForPatterns(), CQueryNode::EvaluateWithoutHits(), CQueryNode::m_ChunkLengths, m_Distance, CQueryNode::m_Occurrences, m_pChild1, m_pChild2, and m_pMiddleChild.

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size_t CQueryNearNode::GetNodeFrequenceByNodeIndex

(

size_t

NodeIndex

)

const [virtual]

Reimplemented from CQueryNode.

References CQueryNode::GetNodeFrequenceByNodeIndex(), m_pChild1, m_pChild2, and m_pMiddleChild.

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Member Data Documentation

CQueryNode* CQueryNearNode::m_pChild1 [private]

the first child

Referenced by CQueryNearNode(), Create(), Evaluate(), GetNodeFrequenceByNodeIndex(), and ~CQueryNearNode().

CQueryNode* CQueryNearNode::m_pMiddleChild [private]

the middle child (can be null)

Referenced by CQueryNearNode(), Create(), Evaluate(), GetNodeFrequenceByNodeIndex(), and ~CQueryNearNode().

CQueryNode* CQueryNearNode::m_pChild2 [private]

the second child

Referenced by CQueryNearNode(), Create(), Evaluate(), GetNodeFrequenceByNodeIndex(), and ~CQueryNearNode().

BYTE CQueryNearNode::m_Distance [private]

the distance between the first child and the second child

Referenced by Evaluate(), and ReadDistanceFromString().

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

• QueryNode.h
• QueryNode.cpp