Module org.jgrapht.io

Package org.jgrapht.nio.gexf

Class GEXFExporter<V,E>

java.lang.Object

org.jgrapht.nio.BaseExporter<V,E>

org.jgrapht.nio.gexf.GEXFExporter<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Implemented Interfaces:

GraphExporter<V,E>

public class GEXFExporter<V,E>
extends BaseExporter<V,E>
implements GraphExporter<V,E>

Exports a graph as GEXF (Graph Exchange XML Format).

For a description of the format see https://gephi.org/gexf/format/schema.html. A nice primer for the format is located at https://gephi.org/gexf/1.2draft/gexf-12draft-primer.pdf.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	GEXFExporter.AttributeCategory	Denotes the category of a GEXF-Attribute.
private class	GEXFExporter.AttributeDetails
static enum	GEXFExporter.Parameter	Parameters that affect the behavior of the exporter.

Field Summary

Fields

Modifier and Type	Field	Description
private String	creator
private String	description
private static final Set<String>	EDGE_RESERVED_ATTRIBUTES
private String	keywords
private static final String	LABEL_ATTRIBUTE_NAME
private final Set<GEXFExporter.Parameter>	parameters
private Map<String,GEXFExporter<V,E>.AttributeDetails>	registeredEdgeAttributes
private Map<String,GEXFExporter<V,E>.AttributeDetails>	registeredVertexAttributes
private int	totalEdgeAttributes
private int	totalVertexAttributes
private static final String	TYPE_ATTRIBUTE_NAME
private static final Set<String>	VERTEX_RESERVED_ATTRIBUTES
private static final String	WEIGHT_ATTRIBUTE_NAME

Fields inherited from class org.jgrapht.nio.BaseExporter

edgeAttributeProvider, edgeIdProvider, graphAttributeProvider, graphIdProvider, vertexAttributeProvider, vertexIdProvider

Constructor Summary

Constructors

Constructor	Description
GEXFExporter()	Constructs a new exporter with integer id providers for the vertices and the edges.
GEXFExporter(Function<V,String> vertexIdProvider, Function<E,String> edgeIdProvider)	Constructs a new exporter.

Method Summary

Modifier and Type	Method	Description
void	exportGraph(Graph<V,E> g, Writer writer)	Exports a graph in GraphML format.
String	getCreator()	Get the creator for the meta field.
String	getDescription()	Get the description for the meta field.
String	getKeywords()	Get the keywords for the meta field.
boolean	isParameter(GEXFExporter.Parameter p)	Return if a particular parameter of the exporter is enabled
void	registerAttribute(String name, GEXFExporter.AttributeCategory category, GEXFAttributeType type)	Register a GEXF Attribute
void	registerAttribute(String name, GEXFExporter.AttributeCategory category, GEXFAttributeType type, String defaultValue)	Register a GEXF Attribute
void	registerAttribute(String name, GEXFExporter.AttributeCategory category, GEXFAttributeType type, String defaultValue, String options)	Register a GEXF Attribute
void	setCreator(String creator)	Set the creator for the meta field.
void	setDescription(String description)	Set the description for the meta field.
void	setKeywords(String keywords)	Set the keywords for the meta field.
void	setParameter(GEXFExporter.Parameter p, boolean value)	Set the value of a parameter of the exporter
void	unregisterAttribute(String name, GEXFExporter.AttributeCategory category)	Unregister a GraphML-Attribute
private void	writeAttribute(TransformerHandler handler, String name, GEXFExporter<V,E>.AttributeDetails details)
private void	writeAttributeValue(TransformerHandler handler, String key, String value)
private void	writeEdgeAttributes(TransformerHandler handler)
private void	writeEdgeAttributeValues(TransformerHandler handler, E e)
private void	writeEdges(TransformerHandler handler, Graph<V,E> g)
private void	writeFooter(TransformerHandler handler)
private void	writeGraphEnd(TransformerHandler handler)
private void	writeGraphStart(TransformerHandler handler, Graph<V,E> g)
private void	writeHeader(TransformerHandler handler)
private void	writeMeta(TransformerHandler handler)
private void	writeVertexAttributes(TransformerHandler handler)
private void	writeVertexAttributeValues(TransformerHandler handler, V v)
private void	writeVertices(TransformerHandler handler, Graph<V,E> g)

Methods inherited from class org.jgrapht.nio.BaseExporter

getEdgeAttribute, getEdgeAttributeProvider, getEdgeAttributes, getEdgeId, getEdgeIdProvider, getGraphAttribute, getGraphAttributeProvider, getGraphId, getGraphIdProvider, getVertexAttribute, getVertexAttributeProvider, getVertexAttributes, getVertexId, getVertexIdProvider, setEdgeAttributeProvider, setEdgeIdProvider, setGraphAttributeProvider, setGraphIdProvider, setVertexAttributeProvider, setVertexIdProvider

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jgrapht.nio.GraphExporter

exportGraph, exportGraph

Field Details

LABEL_ATTRIBUTE_NAME

private static final String LABEL_ATTRIBUTE_NAME

See Also:

• Constant Field Values

WEIGHT_ATTRIBUTE_NAME

private static final String WEIGHT_ATTRIBUTE_NAME

See Also:

• Constant Field Values

TYPE_ATTRIBUTE_NAME

private static final String TYPE_ATTRIBUTE_NAME

See Also:

• Constant Field Values

VERTEX_RESERVED_ATTRIBUTES

private static final Set<String> VERTEX_RESERVED_ATTRIBUTES

EDGE_RESERVED_ATTRIBUTES

private static final Set<String> EDGE_RESERVED_ATTRIBUTES

totalVertexAttributes

private int totalVertexAttributes

registeredVertexAttributes

private Map<String,GEXFExporter<V,E>.AttributeDetails> registeredVertexAttributes

totalEdgeAttributes

private int totalEdgeAttributes

registeredEdgeAttributes

private Map<String,GEXFExporter<V,E>.AttributeDetails> registeredEdgeAttributes

parameters

private final Set<GEXFExporter.Parameter> parameters

creator

private String creator

keywords

private String keywords

description

private String description

Constructor Details

GEXFExporter

public GEXFExporter()

Constructs a new exporter with integer id providers for the vertices and the edges.

GEXFExporter

public GEXFExporter(Function<V,String> vertexIdProvider,
 Function<E,String> edgeIdProvider)

Constructs a new exporter.

Parameters:

vertexIdProvider - for generating vertex identifiers. Must not be null.

edgeIdProvider - for generating edge identifiers. Must not be null.

Method Details

isParameter

public boolean isParameter(GEXFExporter.Parameter p)

Return if a particular parameter of the exporter is enabled

Parameters:

p - the parameter

Returns:

true if the parameter is set, false otherwise

setParameter

public void setParameter(GEXFExporter.Parameter p,
 boolean value)

Set the value of a parameter of the exporter

Parameters:

p - the parameter

value - the value to set

registerAttribute

public void registerAttribute(String name,
 GEXFExporter.AttributeCategory category,
 GEXFAttributeType type)

Register a GEXF Attribute

Parameters:

name - the attribute name

category - the attribute category

type - the attribute type

registerAttribute

public void registerAttribute(String name,
 GEXFExporter.AttributeCategory category,
 GEXFAttributeType type,
 String defaultValue)

Register a GEXF Attribute

Parameters:

name - the attribute name

category - the attribute category

type - the attribute type

defaultValue - default value

registerAttribute

public void registerAttribute(String name,
 GEXFExporter.AttributeCategory category,
 GEXFAttributeType type,
 String defaultValue,
 String options)

Register a GEXF Attribute

Parameters:

name - the attribute name

category - the attribute category

type - the attribute type

defaultValue - default value

options - the possible options

unregisterAttribute

public void unregisterAttribute(String name,
 GEXFExporter.AttributeCategory category)

Unregister a GraphML-Attribute

Parameters:

name - the attribute name

category - the attribute category

getCreator

public String getCreator()

Get the creator for the meta field.

Returns:

the creator for the meta field

setCreator

public void setCreator(String creator)

Set the creator for the meta field.

Parameters:

creator - the creator for the meta field

getKeywords

public String getKeywords()

Get the keywords for the meta field.

Returns:

the keywords for the meta field

setKeywords

public void setKeywords(String keywords)

Set the keywords for the meta field.

Parameters:

keywords - the keywords for the meta field

getDescription

public String getDescription()

Get the description for the meta field.

Returns:

the description for the meta field

setDescription

public void setDescription(String description)

Set the description for the meta field.

Parameters:

description - the description for the meta field

exportGraph

public void exportGraph(Graph<V,E> g,
 Writer writer)

Exports a graph in GraphML format.

Specified by:

exportGraph in interface GraphExporter<V,E>

Parameters:

g - the graph

writer - the writer to export the graph

Throws:

ExportException - in case any error occurs during export

writeHeader

private void writeHeader(TransformerHandler handler)
                  throws SAXException

Throws:

SAXException

writeMeta

private void writeMeta(TransformerHandler handler)
                throws SAXException

Throws:

SAXException

writeGraphStart

private void writeGraphStart(TransformerHandler handler,
 Graph<V,E> g)
                      throws SAXException

Throws:

SAXException

writeGraphEnd

private void writeGraphEnd(TransformerHandler handler)
                    throws SAXException

Throws:

SAXException

writeFooter

private void writeFooter(TransformerHandler handler)
                  throws SAXException

Throws:

SAXException

writeVertexAttributes

private void writeVertexAttributes(TransformerHandler handler)
                            throws SAXException

Throws:

SAXException

writeEdgeAttributes

private void writeEdgeAttributes(TransformerHandler handler)
                          throws SAXException

Throws:

SAXException

writeAttribute

private void writeAttribute(TransformerHandler handler,
 String name,
 GEXFExporter<V,E>.AttributeDetails details)
                     throws SAXException

Throws:

SAXException

writeVertexAttributeValues

private void writeVertexAttributeValues(TransformerHandler handler,
 V v)
                                 throws SAXException

Throws:

SAXException

writeEdgeAttributeValues

private void writeEdgeAttributeValues(TransformerHandler handler,
 E e)
                               throws SAXException

Throws:

SAXException

writeAttributeValue

private void writeAttributeValue(TransformerHandler handler,
 String key,
 String value)
                          throws SAXException

Throws:

SAXException

writeVertices

private void writeVertices(TransformerHandler handler,
 Graph<V,E> g)
                    throws SAXException

Throws:

SAXException

writeEdges

private void writeEdges(TransformerHandler handler,
 Graph<V,E> g)
                 throws SAXException

Throws:

SAXException