textractor.database
Class TextractorDBDocumentSequence

java.lang.Object
  textractor.database.TextractorDBDocumentSequence

All Implemented Interfaces:

DocumentSequence, Closeable

Direct Known Subclasses:

AmbiguityDocumentSequence

public class TextractorDBDocumentSequence
extends Object
implements DocumentSequence

A document sequence that reads documents from the database.

Author:

Fabien Campagne Date: Oct 23, 2005 Time: 12:45:10 PM

Field Summary

protected int	chunkSize
protected DbManager	dbm

Constructor Summary

TextractorDBDocumentSequence(DbManager dbm, DocumentFactory factory, int chunkSize)
Construct the sequence with a database manager.

TextractorDBDocumentSequence(DbManager dbm, TextractorDocumentFactory factory, int chunkSize, SentenceFilter filter)
Construct the sequence with a database manager and a sentence filter.

TextractorDBDocumentSequence(DocumentFactory factory, int chunkSize)
Construct the sequence, creating a new database manager with default connection parameters.

Method Summary

void	close() Releases database resources.
DocumentFactory	factory()
DocumentIterator	iterator()

Methods inherited from class java.lang.Object

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

Field Detail

dbm

protected DbManager dbm

chunkSize

protected int chunkSize

Constructor Detail

TextractorDBDocumentSequence

public TextractorDBDocumentSequence(DbManager dbm,
                                    DocumentFactory factory,
                                    int chunkSize)

Construct the sequence with a database manager.

Parameters:

dbm - The database manager to connect to the textractor database

factory - The document factory that should be used to create the documents returned by this sequence.

chunkSize - Number of documents to retrieve from the database in on chunk.

TextractorDBDocumentSequence

public TextractorDBDocumentSequence(DocumentFactory factory,
                                    int chunkSize)
                             throws TextractorDatabaseException

Construct the sequence, creating a new database manager with default connection parameters.

Parameters:

factory - The document factory that should be used to create the documents returned by this sequence.

chunkSize - Number of documents to retrieve from the database in on chunk.

Throws:

TextractorDatabaseException

TextractorDBDocumentSequence

public TextractorDBDocumentSequence(DbManager dbm,
                                    TextractorDocumentFactory factory,
                                    int chunkSize,
                                    SentenceFilter filter)

Construct the sequence with a database manager and a sentence filter. The filter provides a mechanism to restrict the set of documents that the document sequence will return.

Parameters:

dbm - The database manager to connect to the textractor database

factory - The document factory that should be used to create the documents returned by this sequence.

chunkSize - Number of documents to retrieve from the database in on chunk.

filter - A filter to decide which sentences from the database should be returned by this sequence.

Method Detail

iterator

public DocumentIterator iterator()

Specified by:

iterator in interface DocumentSequence

factory

public DocumentFactory factory()

Specified by:

factory in interface DocumentSequence

close

public void close()

Releases database resources. Shutdown the DbManager only if this class created it (the DbManager will not be closed if it was provided by the constructor).

Specified by:

close in interface DocumentSequence

Specified by:

close in interface Closeable