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*) minor changes git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7567 6c8d7289-2bf4-0310-a012-ef5d649a1542
59 lines
2.1 KiB
Java
59 lines
2.1 KiB
Java
// Order.java
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// -----------------------
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// part of The Kelondro Database
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2005
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// created 29.12.2005
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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.kelondro.order;
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import java.util.Comparator;
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public interface Order<A> extends Comparator<A> {
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public boolean wellformed(A a); // returns true if and only if a has only characters that belong to the implemented order
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public Order<A> clone();
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public void direction(boolean ascending); // the ordering direction can be changed at any time
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public String signature(); // returns a signature String so that different orderings have different signatures
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public long partition(A key, int forkes);
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public long cardinal(A key); // returns a cardinal number in the range of 0 .. Long.MAX_VALUE
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public int compare(A a, A b);
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public boolean equal(A a, A b);
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public A zero(); // returns the zero point of the Ordering; null if not defined
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public void rotate(A zero); // defines that the ordering rotates, and sets the zero point for the rotation
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@Override
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public boolean equals(Object o); // used to compare different order objects; they may define the same ordering
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@Override
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public int hashCode();
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}
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