net.ontopia.infoset.fulltext.impl.lucene

Class LuceneIndexer

java.lang.Object

net.ontopia.infoset.fulltext.impl.lucene.LuceneIndexer

All Implemented Interfaces:

IndexerIF

public class LuceneIndexer
extends Object
implements IndexerIF

INTERNAL: The Lucene indexer implementation. This indexer uses the Lucene search engine to index documents.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.lucene.index.IndexWriter	writer

Constructor Summary

Constructors

Constructor and Description
LuceneIndexer(org.apache.lucene.index.IndexWriter writer) INTERNAL: Creates an indexer instance that will store its index in the given lucene directory and use the specified token stream analyzer.

Method Summary

Modifier and Type	Method and Description
void	close() INTERNAL: Closes the indexer.
void	delete() INTERNAL: Deletes the index.
void	delete(String field, String value) INTERNAL: Removes all documents with the specified field value from the index.
void	flush() INTERNAL: Flushes all changes done to the index.
int	getDocs() INTERNAL: Returns the number of documents stored in the index.
protected org.apache.lucene.document.Document	getDocument(DocumentIF document)
protected org.apache.lucene.document.Field	getField(FieldIF field)
protected org.apache.lucene.document.FieldType	getFieldType(FieldIF field)
protected String	getStringValue(Reader reader)
void	index(DocumentIF document) INTERNAL: Indexes the specified document.

Methods inherited from class java.lang.Object

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

Field Detail

writer

protected org.apache.lucene.index.IndexWriter writer

Constructor Detail

LuceneIndexer

public LuceneIndexer(org.apache.lucene.index.IndexWriter writer)

INTERNAL: Creates an indexer instance that will store its index in the given lucene directory and use the specified token stream analyzer.

Method Detail

getDocs

public int getDocs()
            throws IOException

INTERNAL: Returns the number of documents stored in the index.

Throws:

IOException

index

public void index(DocumentIF document)
           throws IOException

Description copied from interface: IndexerIF

INTERNAL: Indexes the specified document. This includes tokenizing, indexing and storing the document fields.

Specified by:

index in interface IndexerIF

Throws:

IOException

delete

public void delete(String field,
                   String value)
            throws IOException

Description copied from interface: IndexerIF

INTERNAL: Removes all documents with the specified field value from the index. This method should generally be, but is not limited to, used to delete documents by their identity field.

Specified by:

delete in interface IndexerIF

Throws:

IOException

flush

public void flush()
           throws IOException

Description copied from interface: IndexerIF

INTERNAL: Flushes all changes done to the index. A flushing operation can include actions like persisting changes and optimizing the index.

Specified by:

flush in interface IndexerIF

Throws:

IOException

delete

public void delete()
            throws IOException

Description copied from interface: IndexerIF

INTERNAL: Deletes the index. The indexer is closed after this method returns. Note that some indexers might not support this operation.

Specified by:

delete in interface IndexerIF

Throws:

IOException

close

public void close()
           throws IOException

Description copied from interface: IndexerIF

INTERNAL: Closes the indexer. After the indexer has been closed it cannot (generally) be reopened.

Specified by:

close in interface IndexerIF

Throws:

IOException

getDocument

protected org.apache.lucene.document.Document getDocument(DocumentIF document)
                                                   throws IOException

Throws:

IOException

getField

protected org.apache.lucene.document.Field getField(FieldIF field)
                                             throws IOException

Throws:

IOException

getFieldType

protected org.apache.lucene.document.FieldType getFieldType(FieldIF field)

getStringValue

protected String getStringValue(Reader reader)
                         throws IOException

Throws:

IOException