org.semanticweb.elk.reasoner.taxonomy.model.KeyProvider Maven / Gradle / Ivy
/*
* #%L
* ELK Reasoner
* $Id:$
* $HeadURL:$
* %%
* Copyright (C) 2011 - 2016 Department of Computer Science, University of Oxford
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package org.semanticweb.elk.reasoner.taxonomy.model;
/**
* Instances of this interface are able to return keys for objects of type
* T. The purpose of these keys is that the methods
* {@link Object#hashCode()} and {@link Object#equals(Object)} are called on
* them instead of the original objects.
*
* @author Peter Skocovsky
*
* @param
* The type of the objects for which the keys are provided.
*/
public interface KeyProvider {
/**
* Returns the key for arg. The methods
* {@link Object#hashCode()} and {@link Object#equals(Object)} will be
* called on this key instead of the original object arg.
*
* @param arg
* The object for which the key should be returned.
* @return the key for arg.
*/
Object getKey(T arg);
}