de.nava.informa.search
Class ChannelIndexer

java.lang.Object
  de.nava.informa.search.ChannelIndexer

public final class ChannelIndexer
extends Object

Utility class which allows to generate respective maintain a fulltext index for news items.

Author:

Niko Schmuck (niko@nava.de)

Constructor Summary

ChannelIndexer(String indexDir)
Constructor which allows to specify the index directory.

Method Summary

String	getIndexDir()
int	getNrOfIndexedItems() Returns the number of documents that were in the index last time the index operation was performed.
void	indexChannels(boolean createNewIndex, Collection channels) Index all news items contained in the given channels.
void	indexItems(boolean createNewIndex, Collection<ItemIF> items) Index all given news items.
void	setIndexDir(String indexDir)

Methods inherited from class java.lang.Object

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

Constructor Detail

ChannelIndexer

public ChannelIndexer(String indexDir)

Constructor which allows to specify the index directory. For the full-text indexing process the lucene StandardAnalyzer is used.

Parameters:

indexDir - - The directory in which the index files are stored.

Method Detail

indexChannels

public void indexChannels(boolean createNewIndex,
                          Collection channels)
                   throws IOException

Index all news items contained in the given channels.

Parameters:

createNewIndex - - wether a new index should be generated or an existant one should be taken into account

channels - - a collection of ChannelIF objects

Throws:

IOException

indexItems

public void indexItems(boolean createNewIndex,
                       Collection<ItemIF> items)
                throws IOException

Index all given news items.

Parameters:

createNewIndex - - Wether a new index should be generated or an existant one should be taken into account.

items - - A collection of ItemIF objects.

Throws:

IOException

getNrOfIndexedItems

public int getNrOfIndexedItems()

Returns the number of documents that were in the index last time the index operation was performed. Note: Use only directly after the indexing process, otherwise the return value may be wrong.

setIndexDir

public void setIndexDir(String indexDir)

getIndexDir

public String getIndexDir()