leila.relations
Class SimpleFunction

java.lang.Object
  leila.relations.Relation
      leila.relations.SimpleFunction

public class SimpleFunction
extends Relation

This class is part of LEILA (http://mpii.de/yago-naga/leila). It is licensed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0) by the author Fabian M. Suchanek (http://suchanek.name).

SimpleFunction.java is a functional relation (i.e. a many-to-one relation), which reads its examples from a given file. It requires the following parameter in leila.ini:

• SimpleFunction - points to a file containing example pairs

By default, the file RelationData/SimpleFunction/examples.txt is read. The example pairs should be of the format

   first second
   ...

Since the relation is functional, any pair with a first component listed in the examples and a "wrong" second component is a counterexample. For example, suppose you store persons with their birth dates in the file. If Chopin is born in 1810, then Chopin/1811, Chopin/1812, ... are implicitly counterexamples.

Nested Class Summary

Nested classes/interfaces inherited from class leila.relations.Relation

Relation.WordPairType

Field Summary

protected java.util.Map<java.lang.String,java.lang.String>	examples Holds the examples
java.util.regex.Pattern	pattern Pattern in the example file

Constructor Summary

SimpleFunction()
Reads the examples from the file given by SimpleRelationExamples

Method Summary

Relation.WordPairType	assess(LinkageWord w1, LinkageWord w2) Tells whether a pair of words is an example, a counterexample or a candidate
boolean	possibleExample(LinkageWord w) Tells whether the word appears in the examples
boolean	requiresCounterexamples() Returns true

Methods inherited from class leila.relations.Relation

toString

Methods inherited from class java.lang.Object

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

Field Detail

examples

protected java.util.Map<java.lang.String,java.lang.String> examples

Holds the examples

pattern

public java.util.regex.Pattern pattern

Pattern in the example file

Constructor Detail

SimpleFunction

public SimpleFunction()
               throws java.lang.Exception

Reads the examples from the file given by SimpleRelationExamples

Throws:

java.lang.Exception

Method Detail

requiresCounterexamples

public boolean requiresCounterexamples()

Returns true

Overrides:

requiresCounterexamples in class Relation

assess

public Relation.WordPairType assess(LinkageWord w1,
                                    LinkageWord w2)

Tells whether a pair of words is an example, a counterexample or a candidate

Overrides:

assess in class Relation

possibleExample

public boolean possibleExample(LinkageWord w)

Tells whether the word appears in the examples

Overrides:

possibleExample in class Relation