org.h2gis.network.graph_creator
Class GraphFunction

java.lang.Object
  org.h2gis.h2spatialapi.AbstractFunction
      org.h2gis.network.graph_creator.GraphFunction

All Implemented Interfaces:

Function

Direct Known Subclasses:

ST_Accessibility, ST_ConnectedComponents, ST_GraphAnalysis, ST_ShortestPath, ST_ShortestPathLength, ST_ShortestPathTree

public class GraphFunction
extends AbstractFunction

Helper class for Graph Functions.

Author:

Adam Gouge

Field Summary

static String

ARG_ERROR

Fields inherited from interface org.h2gis.h2spatialapi.Function

PROP_NAME, PROP_REMARKS

Constructor Summary

GraphFunction()

Method Summary

protected static void	logTime(org.slf4j.Logger logger, long startTime) Log the time elapsed from startTime until now.
protected static org.javanetworkanalyzer.model.KeyedGraph	prepareGraph(Connection connection, String inputTable, String orientation, String weight, Class vertexClass, Class edgeClass) Return a JGraphT graph from the input edges table.

Methods inherited from class org.h2gis.h2spatialapi.AbstractFunction

addProperty, getProperty, removeProperty

Methods inherited from class java.lang.Object

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

Field Detail

ARG_ERROR

public static final String ARG_ERROR

See Also:

Constant Field Values

Constructor Detail

GraphFunction

public GraphFunction()

Method Detail

prepareGraph

protected static org.javanetworkanalyzer.model.KeyedGraph prepareGraph(Connection connection,
                                                                       String inputTable,
                                                                       String orientation,
                                                                       String weight,
                                                                       Class vertexClass,
                                                                       Class edgeClass)
                                                                throws SQLException

Return a JGraphT graph from the input edges table.

Parameters:

connection - Connection

inputTable - Input table name

orientation - Orientation string

weight - Weight column name, null for unweighted graphs

Returns:

Graph

Throws:

SQLException

logTime

protected static void logTime(org.slf4j.Logger logger,
                              long startTime)

Log the time elapsed from startTime until now.

Parameters:

logger - Logger

startTime - Start time in milliseconds