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.
Directory	create()
DataAccess	find(String name) Tries to find the object with that name if not existent it creates one and associates the location with it.
DataAccess	find(String name, DAType type)
Collection<DataAccess>	getAll() Returns all created directories.
ByteOrder	getByteOrder()
DAType	getDefaultType()
String	getLocation()
void	remove(DataAccess da) Removes the specified object from the directory.

Method Detail

getLocation

String getLocation()

Returns:

an id or location in the local filesystem.

getByteOrder

ByteOrder getByteOrder()

Returns:

the order in which the data is stored

find

DataAccess find(String name)

Tries to find the object with that name if not existent it creates one and associates the location with it. A name is unique in one Directory.

find

DataAccess find(String name,
                DAType type)

remove

void remove(DataAccess da)

Removes the specified object from the directory.

getDefaultType

DAType getDefaultType()

Returns:

the default type of a newly created DataAccess object

clear

void clear()

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

getAll

Collection<DataAccess> getAll()

Returns all created directories.

create

Directory create()