Package org.graphstream.stream.file.dgs

Class OldFileSourceDGS

java.lang.Object

org.graphstream.stream.SourceBase

org.graphstream.stream.file.FileSourceBase

org.graphstream.stream.file.dgs.OldFileSourceDGS

All Implemented Interfaces:

FileSource, Source

public class OldFileSourceDGS
extends FileSourceBase

Class responsible for parsing files in the DGS format.

The DGS file format is especially designed for storing dynamic graph definitions into a file. More information about the DGS file format will be found on the GraphStream web site: http://graphstream-project.org/

The usual file name extension used for this format is ".dgs".

See Also:

FileSource

Nested Class Summary

Nested classes/interfaces inherited from class org.graphstream.stream.SourceBase

SourceBase.ElementType

Constructor Summary

Constructors

Constructor	Description
OldFileSourceDGS()	New reader for the DGS graph file format version 3.

Method Summary

Modifier and Type	Method	Description
void	begin(InputStream stream)	Begin reading the file stopping as soon as possible.
void	begin(Reader reader)	Begin reading the file stopping as soon as possible.
void	begin(String filename)	Begin reading the file stopping as soon as possible.
void	begin(URL url)	Begin reading the file stopping as soon as possible.
boolean	nextEvents()	Try to process one graph event, or as few as possible, if more must be read at once.
boolean	nextStep()	Try to process all the events occurring during one time step.

Methods inherited from class org.graphstream.stream.file.FileSourceBase

addAttributeClass, end, readAll, readAll, readAll, readAll

Methods inherited from class org.graphstream.stream.SourceBase

addAttributeSink, addElementSink, addSink, attributeSinks, clearAttributeSinks, clearElementSinks, clearSinks, elementSinks, removeAttributeSink, removeElementSink, removeSink, sendAttributeChangedEvent, sendAttributeChangedEvent, sendEdgeAdded, sendEdgeAdded, sendEdgeAttributeAdded, sendEdgeAttributeAdded, sendEdgeAttributeChanged, sendEdgeAttributeChanged, sendEdgeAttributeRemoved, sendEdgeAttributeRemoved, sendEdgeRemoved, sendEdgeRemoved, sendGraphAttributeAdded, sendGraphAttributeAdded, sendGraphAttributeChanged, sendGraphAttributeChanged, sendGraphAttributeRemoved, sendGraphAttributeRemoved, sendGraphCleared, sendGraphCleared, sendNodeAdded, sendNodeAdded, sendNodeAttributeAdded, sendNodeAttributeAdded, sendNodeAttributeChanged, sendNodeAttributeChanged, sendNodeAttributeRemoved, sendNodeAttributeRemoved, sendNodeRemoved, sendNodeRemoved, sendStepBegins, sendStepBegins

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.graphstream.stream.Source

addAttributeSink, addElementSink, addSink, clearAttributeSinks, clearElementSinks, clearSinks, removeAttributeSink, removeElementSink, removeSink

Constructor Details

OldFileSourceDGS

public OldFileSourceDGS()

New reader for the DGS graph file format version 3.

Method Details

nextEvents

public boolean nextEvents() throws IOException

Description copied from interface: FileSource

Try to process one graph event, or as few as possible, if more must be read at once. For this method to work, you must have called FileSource.begin(InputStream) or FileSource.begin(String) before. This method return true while there are still events to read.

Specified by:

nextEvents in interface FileSource

Specified by:

nextEvents in class FileSourceBase

Returns:

true if there are still events to read, false as soon as the file is finished.

Throws:

IOException - If an I/O error occurs while reading.

nextStep

public boolean nextStep() throws IOException

Description copied from interface: FileSource

Try to process all the events occurring during one time step. In GraphStream, a time step is a group of events that are considered occurring at the same time. Most file formats do not have this notion of step. The DGS format designed for GraphStream handles steps. This method return true while there are still events to read.

Returns:

true if there are still events to read, false as soon as the file is finished.

Throws:

IOException - If an I/O error occurs while reading.

begin

public void begin(String filename) throws IOException

Description copied from interface: FileSource

Begin reading the file stopping as soon as possible. Next graph events stored in the file will be sent by calling FileSource.nextEvents() or FileSource.nextStep(). Once begin() has been called, you must finish the reading process using FileSource.end(). You cannot call begin() twice without having called FileSource.end() in between.

Specified by:

begin in interface FileSource

Overrides:

begin in class FileSourceBase

Parameters:

filename - Name of the file to read.

Throws:

IOException - If an I/O error occurs while reading.

begin

public void begin(URL url) throws IOException

Description copied from interface: FileSource

Begin reading the file stopping as soon as possible. Next graph events stored in the file will be sent by calling FileSource.nextEvents() or FileSource.nextStep(). Once begin() has been called, you must finish the reading process using FileSource.end(). You cannot call begin() twice without having called FileSource.end() in between.

Specified by:

begin in interface FileSource

Overrides:

begin in class FileSourceBase

Parameters:

url - The URL of the file to read.

Throws:

IOException - If an I/O error occurs while reading.

begin

public void begin(InputStream stream) throws IOException

Description copied from interface: FileSource

Begin reading the file stopping as soon as possible. Next graph events stored in the file will be sent by calling FileSource.nextEvents() or FileSource.nextStep(). Once begin() has been called, you must finish the reading process using FileSource.end(). You cannot call begin() twice without having called FileSource.end() in between.

Specified by:

begin in interface FileSource

Overrides:

begin in class FileSourceBase

Parameters:

stream - The input stream to use for reading.

Throws:

IOException - If an I/O error occurs while reading.

begin

public void begin(Reader reader) throws IOException

Description copied from interface: FileSource

Begin reading the file stopping as soon as possible. Next graph events stored in the file will be sent by calling FileSource.nextEvents() or FileSource.nextStep(). Once begin() has been called, you must finish the reading process using FileSource.end(). You cannot call begin() twice without having called FileSource.end() in between.

Specified by:

begin in interface FileSource

Overrides:

begin in class FileSourceBase

Parameters:

reader - The file reader to use.

Throws:

IOException - If an I/O error occurs while reading.