Class MatrixExporter<V,E>

java.lang.Object

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

org.jgrapht.nio.matrix.MatrixExporter<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Implemented Interfaces:

GraphExporter<V,E>

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

Exports a graph to a plain text matrix format, which can be processed by matrix manipulation software, such as MTJ or MATLAB.

The exporter supports three different formats, see MatrixExporter.Format.

See Also:

• MatrixExporter.Format

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	MatrixExporter.Format	Formats supported by the MatrixExporter exporter.

Field Summary

Fields

Modifier and Type	Field	Description
private final String	delimiter
private MatrixExporter.Format	format

Fields inherited from class BaseExporter

edgeAttributeProvider, edgeIdProvider, graphAttributeProvider, graphIdProvider, vertexAttributeProvider, vertexIdProvider

Constructor Summary

Constructors

Constructor	Description
MatrixExporter()	Creates a new MatrixExporter with integer name provider for the vertex identifiers and MatrixExporter.Format.SPARSE_ADJACENCY_MATRIX as the default format.
MatrixExporter(MatrixExporter.Format format)	Creates a new MatrixExporter with integer name provider for the vertex identifiers.
MatrixExporter(MatrixExporter.Format format, Function<V,String> vertexIdProvider)	Creates a new MatrixExporter.

Method Summary

Modifier and Type	Method	Description
private void	exportAdjacencyMatrix(Graph<V,E> g, Writer writer)
private void	exportAdjacencyMatrixVertex(PrintWriter writer, V from, List<V> neighbors)
private void	exportEntry(PrintWriter writer, String from, String to, String value)
void	exportGraph(Graph<V,E> g, Writer writer)	Export a graph using the given Writer.
private void	exportLaplacianMatrix(Graph<V,E> g, Writer writer)
private void	exportNormalizedLaplacianMatrix(Graph<V,E> g, Writer writer)
MatrixExporter.Format	getFormat()	Get the format that the exporter is using.
void	setFormat(MatrixExporter.Format format)	Set the output format of the exporter

Methods inherited from class 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 Object

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

Methods inherited from interface GraphExporter

exportGraph, exportGraph

Field Details

delimiter

private final String delimiter

See Also:

• Constant Field Values

format

private MatrixExporter.Format format

Constructor Details

MatrixExporter

public MatrixExporter()

Creates a new MatrixExporter with integer name provider for the vertex identifiers and MatrixExporter.Format.SPARSE_ADJACENCY_MATRIX as the default format.

MatrixExporter

public MatrixExporter(MatrixExporter.Format format)

Creates a new MatrixExporter with integer name provider for the vertex identifiers.

Parameters:

format - format to use

MatrixExporter

public MatrixExporter(MatrixExporter.Format format,
 Function<V,String> vertexIdProvider)

Creates a new MatrixExporter.

Parameters:

format - format to use

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

Method Details

getFormat

public MatrixExporter.Format getFormat()

Get the format that the exporter is using.

Returns:

the output format

setFormat

public void setFormat(MatrixExporter.Format format)

Set the output format of the exporter

Parameters:

format - the format to use

exportGraph

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

Description copied from interface: GraphExporter

Export a graph using the given Writer.

It is the callers responsibility to ensure the Writer is closed after this method returned.

Specified by:

exportGraph in interface GraphExporter<V,E>

Parameters:

g - the graph to export

writer - the output writer

Throws:

ExportException - in case any error occurs

exportAdjacencyMatrix

private void exportAdjacencyMatrix(Graph<V,E> g,
 Writer writer)

exportAdjacencyMatrixVertex

private void exportAdjacencyMatrixVertex(PrintWriter writer,
 V from,
 List<V> neighbors)

exportEntry

private void exportEntry(PrintWriter writer,
 String from,
 String to,
 String value)

exportLaplacianMatrix

private void exportLaplacianMatrix(Graph<V,E> g,
 Writer writer)

exportNormalizedLaplacianMatrix

private void exportNormalizedLaplacianMatrix(Graph<V,E> g,
 Writer writer)