org.openrdf.sail.nativerdf.datastore
Class HashFile

java.lang.Object
  org.openrdf.sail.nativerdf.datastore.HashFile

public class HashFile
extends Object

Class supplying access to a hash file.

Author:

Arjohn Kampman

Nested Class Summary

class

HashFile.IDIterator

Constructor Summary

HashFile(File file)

HashFile(File file, boolean forceSync)

Method Summary

void	clear()
void	close()
void	dumpContents(PrintStream out)
int	getBucketCount()
int	getBucketSize()
File	getFile()
FileChannel	getFileChannel()
HashFile.IDIterator	getIDIterator(int hash) Gets an iterator that iterates over the IDs with hash codes that match the specified hash code.
int	getItemCount()
int	getRecordSize()
static void	main(String[] args)
void	storeID(int hash, int id) Stores ID under the specified hash code in this hash file.
void	sync() Syncs any unstored data to the hash file.

Methods inherited from class java.lang.Object

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

Constructor Detail

HashFile

public HashFile(File file)
         throws IOException

Throws:

IOException

HashFile

public HashFile(File file,
                boolean forceSync)
         throws IOException

Throws:

IOException

Method Detail

getFile

public File getFile()

getFileChannel

public FileChannel getFileChannel()

getBucketCount

public int getBucketCount()

getBucketSize

public int getBucketSize()

getItemCount

public int getItemCount()

getRecordSize

public int getRecordSize()

getIDIterator

public HashFile.IDIterator getIDIterator(int hash)
                                  throws IOException

Gets an iterator that iterates over the IDs with hash codes that match the specified hash code.

Throws:

IOException

storeID

public void storeID(int hash,
                    int id)
             throws IOException

Stores ID under the specified hash code in this hash file.

Throws:

IOException

clear

public void clear()
           throws IOException

Throws:

IOException

sync

public void sync()
          throws IOException

Syncs any unstored data to the hash file.

Throws:

IOException

close

public void close()
           throws IOException

Throws:

IOException

dumpContents

public void dumpContents(PrintStream out)
                  throws IOException

Throws:

IOException

main

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

Throws:

Exception