org.terrier.structures.indexing
Class DocumentIndexBuilder

java.lang.Object
  org.terrier.structures.indexing.DocumentIndexBuilder

public class DocumentIndexBuilder
extends java.lang.Object

A builder for the document index.

Author:

Vassilis Plachouras

Field Summary

protected java.io.DataOutputStream	dos The stream to which we write the data.
protected Index	index index object of the index currently being created
protected static org.apache.log4j.Logger	logger The logger used
protected int	numberOfDocumentIndexEntries The total number of entries in the document index.
protected java.lang.String	structureName Name of the structure to which we're writing

Constructor Summary

DocumentIndexBuilder(Index i, java.lang.String _structureName)
Construct a DocumentIndex associated with the specified index

Method Summary

void	addEntryToBuffer(org.apache.hadoop.io.Writable die) Adds to the index a new entry, giving to it the next available document id.
void	close() Closes the random access file.
void	finishedCollections() Closes the underlying file after finished processing the collections.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.apache.log4j.Logger logger

The logger used

structureName

protected java.lang.String structureName

Name of the structure to which we're writing

dos

protected java.io.DataOutputStream dos

The stream to which we write the data.

numberOfDocumentIndexEntries

protected int numberOfDocumentIndexEntries

The total number of entries in the document index.

index

protected Index index

index object of the index currently being created

Constructor Detail

DocumentIndexBuilder

public DocumentIndexBuilder(Index i,
                            java.lang.String _structureName)

Construct a DocumentIndex associated with the specified index

Parameters:

i - Index being constructed

_structureName - the name of the structure being created

Method Detail

addEntryToBuffer

public void addEntryToBuffer(org.apache.hadoop.io.Writable die)
                      throws java.io.IOException

Adds to the index a new entry, giving to it the next available document id.

Parameters:

die - The document index entry being written

Throws:

java.io.IOException - Throws an exception in the case of an IO error.

close

public void close()

Closes the random access file.

finishedCollections

public void finishedCollections()

Closes the underlying file after finished processing the collections.