info.ephyra.search.searchers
Class WikipediaKA

java.lang.Object
  java.lang.Thread
      info.ephyra.search.searchers.Searcher
          info.ephyra.search.searchers.KnowledgeAnnotator
              info.ephyra.search.searchers.WikipediaKA

All Implemented Interfaces:

java.lang.Runnable

public class WikipediaKA
extends KnowledgeAnnotator

A KnowledgeAnnotator for the Wikipedia online encyclopedia. It answers a question for a definition by returning a sentence from the corresponding Wikipedia web page.

It runs as a separate thread, so several queries can be performed in parallel.

This class extends the class KnowledgeAnnotator.

Version:

2005-09-28

Author:

Nico Schlaefer

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

private static java.lang.String

URL The URL of the Wikipedia search page.

Fields inherited from class info.ephyra.search.searchers.KnowledgeAnnotator

index, matcher, name, qContents, qPatterns

Fields inherited from class info.ephyra.search.searchers.Searcher

query, results

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

	WikipediaKA(java.lang.String filename) Creates a WikipediaKA and calls the constructor of the superclass that reads the question patterns from a file.
protected	WikipediaKA(java.lang.String name, java.util.ArrayList<java.util.regex.Pattern> qPatterns, java.util.ArrayList<java.lang.String> qContents) Protected constructor used by the getCopy() method.

Method Summary

protected Result[]	doSearch() Queries Wikipedia for a definition and returns an array containing a single Result object or an empty array, if the search failed.
KnowledgeAnnotator	getCopy() Returns a new instance of WikipediaKA.

Methods inherited from class info.ephyra.search.searchers.KnowledgeAnnotator

getContent, getKAName, getResult, matches, start

Methods inherited from class info.ephyra.search.searchers.Searcher

run

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

URL

private static final java.lang.String URL

The URL of the Wikipedia search page.

See Also:

Constant Field Values

Constructor Detail

WikipediaKA

protected WikipediaKA(java.lang.String name,
                      java.util.ArrayList<java.util.regex.Pattern> qPatterns,
                      java.util.ArrayList<java.lang.String> qContents)

Protected constructor used by the getCopy() method.

Parameters:

name - name of the KnowledgeAnnotator

qPatterns - question patterns

qContents - descriptors of the relevant content of a question

WikipediaKA

public WikipediaKA(java.lang.String filename)
            throws java.io.IOException

Creates a WikipediaKA and calls the constructor of the superclass that reads the question patterns from a file.

Parameters:

filename - file containing the question patterns

Throws:

java.io.IOException

Method Detail

doSearch

protected Result[] doSearch()

Queries Wikipedia for a definition and returns an array containing a single Result object or an empty array, if the search failed.

Specified by:

doSearch in class Searcher

Returns:

array containing a single Result or an empty array

getCopy

public KnowledgeAnnotator getCopy()

Returns a new instance of WikipediaKA. A new instance is created for each query.

Specified by:

getCopy in class KnowledgeAnnotator

Returns:

new instance of WikipediaKA