VGServer::GraphLoader Class Reference
[Public Application Interface]

GraphLoader is a class which extends GraphData by load functions which accept vertex and edge data _in_ascending_order_ and write it into a global GraphData's structure. More...

#include <GraphLoader.h>

Inheritance diagram for VGServer::GraphLoader:

List of all members.


Public Member Functions
void	addEdge (vertexid_t src, vertexid_t tgt)
	Creates or starts a new edge from the given src to tgt vertex ids.
void	addVertex (vertexid_t vid)
	Creates a new vertex with the given id.
GraphData &	finish ()
	finish loading data, returns a reference to the enclosed GraphData.
	GraphLoader (const class GraphProperties &gp)
	create an initialized GraphLoader.
void	reserve (unsigned int vertexnum, unsigned int edgenum, unsigned int vertexattrsize, unsigned int edgeattrsize)
	reserve can be used to allocate enough space in the vertex, the edge, and the two attribute arrays.
void	setEdgeAttr (vertexid_t src, vertexid_t tgt, unsigned int attrid, const class AnyType &value)
	Sets the attribute of an edge.
void	setVertexAttr (vertexid_t vid, unsigned int attrid, const class AnyType &value)
	Sets the attribute of a vertex.
void	terminate ()
	add the termination nodes, this will be called automaticly by finish().

Detailed Description

GraphLoader is a class which extends GraphData by load functions which accept vertex and edge data _in_ascending_order_ and write it into a global GraphData's structure.

Definition at line 15 of file GraphLoader.h.

Constructor & Destructor Documentation

VGServer::GraphLoader::GraphLoader ( const class GraphProperties & gp ) [explicit]

create an initialized GraphLoader.

Definition at line 12 of file GraphLoader.cc.

References VGServer::GraphData::edges, and VGServer::GraphData::vertices.

Member Function Documentation

void VGServer::GraphLoader::addEdge	(	vertexid_t	src,
		vertexid_t	tgt
	)

Creates or starts a new edge from the given src to tgt vertex ids.

Again this function is called from setEdgeAttr if the edge doesnt exist. The source vertex must already be loaded via addVertex().

Definition at line 232 of file GraphLoader.cc.

References VGServer::AttributePropertiesList::defbytes, VGServer::GraphProperties::edgeattr, VGServer::GraphData::edgeattr, VGServer::GraphData::edges, VGServer::GraphData::properties, VGServer::GraphData::Edge::target, VGServer::GraphData::vertices, and VGServer::TpAttributeBlob< AllocPolicy >::zero().

Referenced by VGServer::GraphLoaderKFile::load(), and setEdgeAttr().

void VGServer::GraphLoader::addVertex ( vertexid_t vid )

Creates a new vertex with the given id.

It is not strictly necessary to call this function as setVertexAttr will create a non-existing vertex.

Definition at line 74 of file GraphLoader.cc.

References VGServer::AttributePropertiesList::defbytes, VGServer::GraphData::properties, VGServer::GraphProperties::vertexattr, VGServer::GraphData::vertexattr, VGServer::GraphData::vertexcount, VGServer::GraphData::vertices, and VGServer::TpAttributeBlob< AllocPolicy >::zero().

Referenced by VGServer::GraphLoaderKFile::load(), and setVertexAttr().

class GraphData & VGServer::GraphLoader::finish ( )

finish loading data, returns a reference to the enclosed GraphData.

the reference should be applyGraph()-ed into a GraphContainer.

Definition at line 37 of file GraphLoader.cc.

References terminate(), and VGServer::VERTEX_INVALID.

void VGServer::GraphLoader::reserve	(	unsigned int	vertexnum,
		unsigned int	edgenum,
		unsigned int	vertexattrsize,
		unsigned int	edgeattrsize
	)

reserve can be used to allocate enough space in the vertex, the edge, and the two attribute arrays.

This function need not be called, all arrays auto-grow. Any value may be 0 if it is unknown.

Parameters:

	vertexnum	estimated vertex number of the graph
	edgenum	estimated edges in the graph
	vertexattrsize	size of packed vertex attributes in bytes
	edgeattrsize	size of packed edge attributes in bytes

Definition at line 27 of file GraphLoader.cc.

References VGServer::TpAttributeBlob< AllocPolicy >::alloc(), VGServer::GraphData::edgeattr, VGServer::GraphData::edges, VGServer::GraphData::vertexattr, and VGServer::GraphData::vertices.

void VGServer::GraphLoader::setEdgeAttr	(	vertexid_t	src,
		vertexid_t	tgt,
		unsigned int	attrid,
		const class AnyType &	value
	)

Sets the attribute of an edge.

The vertex id pair need not exist, however vertex id pair _and_ attribute id can only be loaded in ascending order, otherwise an OrderException is thrown.

Definition at line 288 of file GraphLoader.cc.

References addEdge(), VGServer::ATTRTYPE_BOOL, VGServer::AnyType::convertType(), VGServer::GraphData::edgeattr, VGServer::GraphProperties::edgeattr, VGServer::AnyType::getInteger(), VGServer::AnyType::getValueLength(), VGServer::GraphData::properties, VGServer::TpAttributeBlob< AllocPolicy >::putAnyType(), and VGServer::TpAttributeBlob< AllocPolicy >::putBool().

Referenced by VGServer::GraphLoaderKFile::load().