org.egothor.repository

Class FastBlindAppender

java.lang.Object

org.egothor.repository.FastBlindAppender

All Implemented Interfaces:

URIRepositoryAppender

public class FastBlindAppender
extends Object
implements URIRepositoryAppender

This class uses a simple way to recognize known URIs and their ids. It uses a bit array and URIs are hashed into it. Id of an URI is given as the bit offset in the array. Disk is not accessed during appending of URIs.

Author:

galambos

Constructor Summary

Constructors

Constructor and Description
FastBlindAppender(String filename, int capacity)

Method Summary

Modifier and Type	Method and Description
long	append(URI uri) Returns id or -id of the URI.
void	close()
long	size() Returns number of URIs in the base, or -1 iff the value is unknown.

Methods inherited from class java.lang.Object

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

Constructor Detail

FastBlindAppender

public FastBlindAppender(String filename,
                         int capacity)
                  throws IOException

Throws:

IOException

Method Detail

append

public long append(URI uri)
            throws DatabaseStorageException

Returns id or -id of the URI. The value is never equal to 0.

Specified by:

append in interface URIRepositoryAppender

Throws:

DatabaseStorageException

close

public void close()

Specified by:

close in interface URIRepositoryAppender

size

public long size()

Description copied from interface: URIRepositoryAppender

Returns number of URIs in the base, or -1 iff the value is unknown.

Specified by:

size in interface URIRepositoryAppender