edu.claflin.finder.io.graph

Class SimpleGraphIO

java.lang.Object

edu.claflin.finder.io.graph.SimpleGraphIO

All Implemented Interfaces:

GraphReader, GraphWriter

public final class SimpleGraphIO
extends java.lang.Object
implements GraphReader, GraphWriter

A class for reading and writing graphs.

Version:

3.1.2 February 2, 2016

Author:

Charles Allen Schultz II

Constructor Summary

Constructors

Constructor and Description
SimpleGraphIO() Empty Constructor for instantiating the class.

Method Summary

Modifier and Type	Method and Description
Graph	parseGraph(java.io.File source, boolean undirected) Reads a graph from memory.
private static boolean	testFile(java.io.File file) Tests to see if a File is a valid graph file.
private java.lang.Integer	verifyRelationship(java.lang.Object edgeData) rapin001 @ 3/2020 Function to verify the edge data is an Integer
void	writeGraph(Graph toWrite) Writes graphs to memory.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleGraphIO

public SimpleGraphIO()

Empty Constructor for instantiating the class. No customization necessary.

Method Detail

parseGraph

public Graph parseGraph(java.io.File source,
                        boolean undirected)

Reads a graph from memory. Reads simple tab delimited graphs. A graph file consists of an edge on each line with a tab delimiting the two nodes joined by the edge and followed by an integer value representing the edge weight.

Specified by:

parseGraph in interface GraphReader

Parameters:

source - the File object representing the graph.

undirected - a boolean indicating if the graph should be interpreted as undirected.

Returns:

the Graph object parsed from the file.

writeGraph

public void writeGraph(Graph toWrite)

Writes graphs to memory. Writes simple tab delimited graphs. Outputs to the disk a graph. Each line of the outputted graph represents an edge. The two nodes joined by the edge are delimited by a tab.

Specified by:

writeGraph in interface GraphWriter

Parameters:

toWrite - the Graph object to write to a file.

testFile

private static boolean testFile(java.io.File file)

Tests to see if a File is a valid graph file. Currently only tests by checking to ensure the provided file is not a directory.

Parameters:

file - the File to test.

Returns:

the boolean value representing if the file is valid.

verifyRelationship

private java.lang.Integer verifyRelationship(java.lang.Object edgeData)

rapin001 @ 3/2020 Function to verify the edge data is an Integer

Parameters:

edgeData - object that you want to verify the class of to be Integer

Returns:

Integer edge weight or 0 if edge data is not an Integer