com.sun.labs.minion.retrieval
Class QuickOr

java.lang.Object
  com.sun.labs.minion.retrieval.QuickOr

Direct Known Subclasses:

ScoredQuickOr

public class QuickOr
extends java.lang.Object

Field Summary

protected int	added The number of sets of postings that have been added.
protected int[]	docs The documents that we're storing.
protected int	p The number of unique documents that we're storing.
protected DiskPartition	part The partition for which we're holding documents.

Constructor Summary

QuickOr(DiskPartition part, int estSize)

Method Summary

void	add(int[] d, float[] w, float qw) Adds an explicit set of documents and weights to this quick or.
void	add(PostingsIterator pi)
void	add(PostingsIterator pi, float fw)
void	addWeightOnly(float qw) Adds only a weight to this QuickOr.
ArrayGroup	getGroup()
void	setQueryStats(QueryStats qs)
protected boolean	shouldStoreAll(DiskPartition part, int estSize) Decide whether we should store weights for all documents in a partition.

Methods inherited from class java.lang.Object

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

Field Detail

part

protected DiskPartition part

The partition for which we're holding documents.

docs

protected int[] docs

The documents that we're storing.

p

protected int p

The number of unique documents that we're storing.

added

protected int added

The number of sets of postings that have been added.

Constructor Detail

QuickOr

public QuickOr(DiskPartition part,
               int estSize)

Method Detail

shouldStoreAll

protected boolean shouldStoreAll(DiskPartition part,
                                 int estSize)

Decide whether we should store weights for all documents in a partition. We will do so if the number of documents in the partition is less than 50,000 or if the estimated size of the results set is more than 90% of the number of documents in the partition.

setQueryStats

public void setQueryStats(QueryStats qs)

add

public void add(PostingsIterator pi)

add

public void add(PostingsIterator pi,
                float fw)

add

public void add(int[] d,
                float[] w,
                float qw)

Adds an explicit set of documents and weights to this quick or.

Parameters:

d - the documents to add

w - the weights associated with the documents

qw - a weight associated with a query term, which will be multiplied against the weights in the array.

addWeightOnly

public void addWeightOnly(float qw)

Adds only a weight to this QuickOr. This allows for document representations where not all terms from a document appear in the partition that this QuickOr corresponds to. We still want those terms' weights to be accounted for.

Parameters:

qw - the query weight of a term to add to this QuickOr

getGroup

public ArrayGroup getGroup()