com.graphhopper.storage

Interface GraphExtension

All Superinterfaces:

AutoCloseable, Closeable, Storable<GraphExtension>

All Known Implementing Classes:

GraphExtension.NoOpExtension, TurnCostExtension

public interface GraphExtension
extends Storable<GraphExtension>

If you need custom storages, like turn cost tables, or osmid tables for your graph you implement this interface and put it in any graph storage you want.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	GraphExtension.NoOpExtension default implementation defines no additional fields or any logic.

Method Summary

Modifier and Type	Method and Description
GraphExtension	copyTo(GraphExtension extStorage) creates a copy of this extended storage
int	getDefaultEdgeFieldValue()
int	getDefaultNodeFieldValue()
void	init(Graph graph, Directory dir) initializes the extended storage by giving the base graph
boolean	isRequireEdgeField()
boolean	isRequireNodeField()
void	setSegmentSize(int bytes) sets the segment size in all additional data storages

Methods inherited from interface com.graphhopper.storage.Storable

close, create, flush, getCapacity, isClosed, loadExisting

Method Detail

isRequireNodeField

boolean isRequireNodeField()

Returns:

true, if and only if, if an additional field at the graphs node storage is required

isRequireEdgeField

boolean isRequireEdgeField()

Returns:

true, if and only if, if an additional field at the graphs edge storage is required

getDefaultNodeFieldValue

int getDefaultNodeFieldValue()

Returns:

the default field value which will be set for default when creating nodes

getDefaultEdgeFieldValue

int getDefaultEdgeFieldValue()

Returns:

the default field value which will be set for default when creating edges

init

void init(Graph graph,
          Directory dir)

initializes the extended storage by giving the base graph

setSegmentSize

void setSegmentSize(int bytes)

sets the segment size in all additional data storages

copyTo

GraphExtension copyTo(GraphExtension extStorage)

creates a copy of this extended storage