org.terrier.realtime.memory

Class MemoryDirectIndex

java.lang.Object

org.terrier.realtime.memory.MemoryDirectIndex

All Implemented Interfaces:

Closeable, AutoCloseable, PostingIndex<MemoryPointer>

public class MemoryDirectIndex
extends Object
implements PostingIndex<MemoryPointer>

This is a DirectIndex structure that is held fully in memory, it is based upon the MemoryInverted class. It does not currently support blocks or fields.

Since:

4.0

Author:

Richard McCreadie

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	MemoryDirectIndex.DocumentPostingList

Nested classes/interfaces inherited from interface org.terrier.structures.PostingIndex

PostingIndex.DocidSpecificDocumentIndex

Constructor Summary

Constructors

Constructor and Description
MemoryDirectIndex(DocumentIndex doi) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(int ptr, int docid, int freq) Add posting to direct file.
void	close()
IterablePosting	getPostings(int pointer)
IterablePosting	getPostings(Pointer pointer) Get the posting given a pointer
PostingIndexInputStream	iterator() Return an iterator over the inverted file.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryDirectIndex

public MemoryDirectIndex(DocumentIndex doi)

Constructor.

Method Detail

add

public void add(int ptr,
       int docid,
       int freq)

Add posting to direct file.

getPostings

public IterablePosting getPostings(Pointer pointer)
                            throws IOException

Get the posting given a pointer

Specified by:

getPostings in interface PostingIndex<MemoryPointer>

Throws:

IOException

getPostings

public IterablePosting getPostings(int pointer)
                            throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

iterator

public PostingIndexInputStream iterator()

Return an iterator over the inverted file.