org.openrdf.sesame.sailimpl.nativerdf
Class NamespaceStore

java.lang.Object
  org.openrdf.sesame.sailimpl.nativerdf.NamespaceStore

public class NamespaceStore

extends Object

An in-memory store for namespace information that uses a file for persistence. Namespaces are encoded in the file as records as follows:

 byte 1 - 3     : internal namespace ID
 byte 4         : reserved byte for storing some boolean properties
 byte 5 - 6     : the length of the encoded namespace prefix
 byte 7 - A     : the UTF-8 encoded namespace prefix
 byte A+1 - A+2 : the length of the encoded namespace name
 byte A+3 - end : the UTF-8 encoded namespace name
 

Version:

$Revision: 1.9.4.3 $

Author:

Arjohn Kampman

Constructor Summary

NamespaceStore(File dataDir)

Method Summary

void	clear()
void	close()
void	commitTransaction()
int	getID(String namespace)
int	getID(String namespace, boolean dirtyReads)
org.openrdf.sesame.sailimpl.nativerdf.Namespace	getNamespace(int id)
org.openrdf.sesame.sailimpl.nativerdf.Namespace	getNamespace(int id, boolean dirtyReads)
String	getNamespaceName(int id)
String	getNamespaceName(int id, boolean dirtyReads)
NamespaceIterator	getNamespaces()
static void	main(String[] args)
void	rollbackTransaction()
void	setNamespacePrefix(String prefix, String name)
void	startTransaction()
int	storeNamespace(String namespace)

Methods inherited from class java.lang.Object

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

Constructor Detail

NamespaceStore

public NamespaceStore(File dataDir)
               throws IOException

Method Detail

getID

public int getID(String namespace)

getID

public int getID(String namespace,
                 boolean dirtyReads)

getNamespace

public org.openrdf.sesame.sailimpl.nativerdf.Namespace getNamespace(int id)

getNamespace

public org.openrdf.sesame.sailimpl.nativerdf.Namespace getNamespace(int id,
                                                                    boolean dirtyReads)

getNamespaceName

public String getNamespaceName(int id)

getNamespaceName

public String getNamespaceName(int id,
                               boolean dirtyReads)

getNamespaces

public NamespaceIterator getNamespaces()

startTransaction

public void startTransaction()

commitTransaction

public void commitTransaction()
                       throws IOException

Throws:

IOException

rollbackTransaction

public void rollbackTransaction()

close

public void close()

clear

public void clear()

storeNamespace

public int storeNamespace(String namespace)

setNamespacePrefix

public void setNamespacePrefix(String prefix,
                               String name)

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception