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59 lines
2.0 KiB
59 lines
2.0 KiB
// Role.java
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// (C) 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 03.12.2009 on http://yacy.net;
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate: 2009-05-28 01:51:34 +0200 (Do, 28 Mai 2009) $
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// $LastChangedRevision: 5988 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.ai.greedy;
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/**
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* a Role object is usually an enumeration object that is produced
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* in a enumeration that implements the Role interface.
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* All role object instances must define that one specific other Role
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* follows the current role. If there are undefined role or multiple role
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* situations, these may be declared with special role instance constants
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*/
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public interface Role {
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/**
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* define which other role shall follow to the current role
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* this returns a cloned role
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* @return the next role
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*/
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public Role nextRole();
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/**
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* necessary equals method for usage of Role in hash tables
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* @param obj
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* @return true if the current role and the given role are equal
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*/
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public boolean equals(Object obj);
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/**
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* necessary hashCode method for usage of Role in hash tables
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* @return a hash code of the role
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*/
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public int hashCode();
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}
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