edu.columbia.cs.cg.prdualrank.searchengine
Class WebBasedSearchEngine

java.lang.Object
  edu.columbia.cs.cg.prdualrank.searchengine.WebBasedSearchEngine

All Implemented Interfaces:

SearchEngine

Direct Known Subclasses:

BingSearchEngine

public abstract class WebBasedSearchEngine
extends java.lang.Object
implements SearchEngine

This class is used for our implementation of: "Searching Patterns for Relation Extraction over the Web: Rediscovering the Pattern-Relation Duality" . Y. Fang and K. C.-C. Chang. In WSDM, pages 825-834, 2011. For further information, WSDM 2011 Conference Website .

Description

Abstract class that provides the behavior of any Web search engine used in PRdualRank.
This class is abstract given that many implementation of WebBasedSearchEngines are available: 1.Yahoo Boss API. Please read usage terms. 2.Bing API. Please read usage terms.

The search engine is used in the Algorithm PatternSearch(To,S,E) in Figure 9 on Section 5 of the mentioned paper.

Since:

2011-10-07

Version:

0.1

Author:

Pablo Barrio, Goncalo Simoes

See Also:

WSDM 2011 Conference Website

Constructor Summary

WebBasedSearchEngine(RawDocumentLoader loader)
Instantiates a new web based search engine using the instance of the loader to be used to process the documents from the web.

Method Summary

java.util.List<Document>

search(java.lang.String query, int k_seed) Issues query into the search engine and retrieves either k_seed or all the documents in the result set, whichever number is the lower.

Methods inherited from class java.lang.Object

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

Constructor Detail

WebBasedSearchEngine

public WebBasedSearchEngine(RawDocumentLoader loader)

Instantiates a new web based search engine using the instance of the loader to be used to process the documents from the web.

Parameters:

loader - the loader

Method Detail

search

public java.util.List<Document> search(java.lang.String query,
                                       int k_seed)

Description copied from interface: SearchEngine

Issues query into the search engine and retrieves either k_seed or all the documents in the result set, whichever number is the lower.

Specified by:

search in interface SearchEngine

Parameters:

query - the query to be issued

k_seed - the number of documents to be retrieved if lower than the total number of hits. All the results are retrieved otherwise.

Returns:

the list of documents contained in the result set.