org.h2gis.network.graph_creator
Class ST_ConnectedComponents

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

All Implemented Interfaces:

Function, ScalarFunction

public class ST_ConnectedComponents
extends GraphFunction
implements ScalarFunction

Calculates the connected components (for undirected graphs) or strongly connected components (for directed graphs) of a graph.

Author:

Adam Gouge

Field Summary

protected static int	BATCH_SIZE
static int	NULL_CONNECTED_COMPONENT_NUMBER
static String	REMARKS

Fields inherited from class org.h2gis.network.graph_creator.GraphFunction

ARG_ERROR

Fields inherited from interface org.h2gis.h2spatialapi.ScalarFunction

PROP_DETERMINISTIC, PROP_NOBUFFER

Fields inherited from interface org.h2gis.h2spatialapi.Function

PROP_NAME, PROP_REMARKS

Constructor Summary

ST_ConnectedComponents()
Constructor

Method Summary

static boolean	getConnectedComponents(Connection connection, String inputTable, String orientation) Calculate the node and edge connected component tables.
String	getJavaStaticMethod()

Methods inherited from class org.h2gis.network.graph_creator.GraphFunction

logTime, prepareGraph

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

Methods inherited from interface org.h2gis.h2spatialapi.Function

getProperty

Field Detail

BATCH_SIZE

protected static final int BATCH_SIZE

See Also:

Constant Field Values

NULL_CONNECTED_COMPONENT_NUMBER

public static final int NULL_CONNECTED_COMPONENT_NUMBER

See Also:

Constant Field Values

REMARKS

public static final String REMARKS

See Also:

Constant Field Values

Constructor Detail

ST_ConnectedComponents

public ST_ConnectedComponents()

Constructor

Method Detail

getJavaStaticMethod

public String getJavaStaticMethod()

Specified by:

getJavaStaticMethod in interface ScalarFunction

getConnectedComponents

public static boolean getConnectedComponents(Connection connection,
                                             String inputTable,
                                             String orientation)
                                      throws SQLException

Calculate the node and edge connected component tables.

Parameters:

connection - Connection

inputTable - Edges table produced by ST_Graph

orientation - Orientation string

Returns:

True if the calculation was successful

Throws:

SQLException