com.graphhopper.storage

Interface Directory

All Known Implementing Classes:

GHDirectory, MMapDirectory, RAMDirectory

public interface Directory

Maintains a collection of DataAccess objects stored at the same location. One GraphStorage per Directory as we need one to maintain one DataAccess object for nodes, edges and location2id index.

Author:

Peter Karich

Method Summary

Modifier and Type	Method and Description
void	clear() Removes all contained objects from the directory and releases its resources.
void	close() Releases all allocated resources from the directory without removing backing files.
Directory	create()
DataAccess	create(String name) Creates a new DataAccess object with the given name in the location of this Directory.
DataAccess	create(String name, DAType type)
DataAccess	create(String name, DAType type, int segmentSize)
DataAccess	create(String name, int segmentSize)
DAType	getDefaultType()
DAType	getDefaultType(String dataAccess, boolean preferInts)
String	getLocation()
void	remove(String name) Removes the specified object from the directory.

Method Detail

getLocation

String getLocation()

Returns:

an id or location in the local filesystem.

create

DataAccess create(String name)

Creates a new DataAccess object with the given name in the location of this Directory. Each name can only be used once.

create

DataAccess create(String name,
                  int segmentSize)

Parameters:

segmentSize - segment size in bytes or -1 to use the default of the corresponding DataAccess implementation

create

DataAccess create(String name,
                  DAType type)

create

DataAccess create(String name,
                  DAType type,
                  int segmentSize)

remove

void remove(String name)

Removes the specified object from the directory.

getDefaultType

DAType getDefaultType()

Returns:

the default type of a newly created DataAccess object

getDefaultType

DAType getDefaultType(String dataAccess,
                      boolean preferInts)

clear

void clear()

Removes all contained objects from the directory and releases its resources.

close

void close()

Releases all allocated resources from the directory without removing backing files.

create

Directory create()