Package org.terrier.querying

Class Scope

java.lang.Object

org.terrier.querying.Scope

All Implemented Interfaces:

PostFilter

public class Scope
extends java.lang.Object
implements PostFilter

Checks that the prefix of the document number (upto the first "-") is included in this list of scopes as given by the scope control. This is a PostFilter, so new_query() is called for each new query, and filter() is called for each result in the resultset.

Author:

Craig Macdonald

Field Summary

Fields inherited from interface org.terrier.querying.PostFilter

FILTER_ADJUSTED, FILTER_OK, FILTER_REMOVE

Constructor Summary

Constructors

Constructor	Description
Scope()

Method Summary

Modifier and Type	Method	Description
byte	filter(Manager m, SearchRequest srq, ResultSet rs, int rank, int docid)	Called for each result in the resultset, used to filter out unwanted results, based on the presence of some strings in the document number.
void	new_query(Manager m, SearchRequest srq, ResultSet rs)	Creates a HashSet of scopes that can are allowed to be in the document number prefix.

Methods inherited from class java.lang.Object

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

Constructor Detail

Scope

public Scope()

Method Detail

new_query

public void new_query(Manager m,
                      SearchRequest srq,
                      ResultSet rs)

Creates a HashSet of scopes that can are allowed to be in the document number prefix.

Specified by:

new_query in interface PostFilter

Parameters:

m - Manager the manager used for processing the request.

srq - SearchRequest the search request to process.

rs - ResultSet the result set for the search request.

filter

public byte filter(Manager m,
                   SearchRequest srq,
                   ResultSet rs,
                   int rank,
                   int docid)

Called for each result in the resultset, used to filter out unwanted results, based on the presence of some strings in the document number. The document number upto the first "-" is checked for presence in the scopes HashSet.

Specified by:

filter in interface PostFilter

Parameters:

m - The manager controlling this query

srq - The search request being processed

rs - the resultset that is being iterated through

rank - the array index in the resultset have we reached

docid - The document number of the currently being processed result.