VGServer::ParseNode Class Reference

ParseNode is the abstract interface for filter or selection nodes constructed by the AttributeParser. More...

#include <AttributeParser.h>

List of all members.

Public Member Functions
virtual bool	getConstVal (AnyType *dest) const =0
	function to check if the subtree evalulates to a constant expression, if dest == NULL then do a static check if the node is always a constant (ignoring subnodes), if dest != NULL try to calculate the constant value and type recursively, thus the return value can be true for a non-constant tree node.
virtual bool	getValue (AnyType &dest, const class GraphContainer &gc, const class Changelist &cl, vertex_or_edge_t voe, unsigned int vid1, unsigned int vid2) const =0
	function to retrieve the selected (calculated) value based on a vertex or edge attribute blob.
virtual std::string	toString () const =0
	more a debug function which returns the parsed selection specification as a string.
virtual	~ParseNode ()
	virtual destructor so derived classes can deallocate their children nodes.
Protected Member Functions
	ParseNode (const ParseNode &pn)
	disable copy construction
	ParseNode ()
	usual construction

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Detailed Description

ParseNode is the abstract interface for filter or selection nodes constructed by the AttributeParser.

It offers abstract virtual methods to calculate the value of a selected Attribute from the attribute chain of a vertex or an edge.

Definition at line 19 of file AttributeParser.h.

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Constructor & Destructor Documentation

VGServer::ParseNode::ParseNode

(

)

[inline, protected]

usual construction

Definition at line 23 of file AttributeParser.h.

VGServer::ParseNode::ParseNode

(

const ParseNode &

pn

)

[protected]

disable copy construction

virtual VGServer::ParseNode::~ParseNode

(

)

[inline, virtual]

virtual destructor so derived classes can deallocate their children nodes.

Definition at line 32 of file AttributeParser.h.

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Member Function Documentation

virtual bool VGServer::ParseNode::getConstVal

(

AnyType *

dest

)

const [pure virtual]

function to check if the subtree evalulates to a constant expression, if dest == NULL then do a static check if the node is always a constant (ignoring subnodes), if dest != NULL try to calculate the constant value and type recursively, thus the return value can be true for a non-constant tree node.

The calculated value will be used as the default value of the attribute.

Referenced by VGServer::FilterRoot::parseString().

virtual bool VGServer::ParseNode::getValue	(	AnyType &	dest,
		const class GraphContainer &	gc,
		const class Changelist &	cl,
		vertex_or_edge_t	voe,
		unsigned int	vid1,
		unsigned int	vid2
	)			const [pure virtual]

function to retrieve the selected (calculated) value based on a vertex or edge attribute blob.

Referenced by VGServer::FilterRoot::eval_edge(), VGServer::FilterRoot::eval_vertex(), VGServer::AttributeSelectorList::processEdgeAttributeBlob(), and VGServer::AttributeSelectorList::processVertexAttributeBlob().

virtual std::string VGServer::ParseNode::toString

(

)

const [pure virtual]

more a debug function which returns the parsed selection specification as a string.

Referenced by VGServer::FilterRoot::toString().

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

• AttributeParser.h

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