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96 lines
4.2 KiB
96 lines
4.2 KiB
// kelondroAbstractOrder.java
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// -----------------------
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// part of The Kelondro Database
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// (C) by Michael Peter Christen; mc@anomic.de
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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: 2005-09-22 22:01:26 +0200 (Thu, 22 Sep 2005) $
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// $LastChangedRevision: 774 $
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// $LastChangedBy: orbiter $
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.kelondro;
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public abstract class kelondroAbstractOrder implements kelondroOrder {
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protected byte[] zero = null;
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protected boolean asc = true;
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public abstract Object clone();
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public void direction(boolean ascending) {
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asc = ascending;
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}
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public long partition(byte[] key, int forks) {
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final long d = (Long.MAX_VALUE / forks) + ((Long.MAX_VALUE % forks) + 1) / forks;
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return cardinal(key) / d;
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}
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public int compare(Object a, Object b) {
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if ((a instanceof byte[]) && (b instanceof byte[])) {
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return compare((byte[]) a, (byte[]) b);
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} else if ((a instanceof kelondroNode) && (b instanceof kelondroNode)) {
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return compare(((kelondroNode) a).getKey(), ((kelondroNode) b).getKey());
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} else if ((a instanceof String) && (b instanceof String)) {
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return compare(((String) a).getBytes(), ((String) b).getBytes());
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} else if ((a instanceof kelondroRow.Entry) && (b instanceof kelondroRow.Entry)) {
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return compare(((kelondroRow.Entry) a).getColBytes(0), ((kelondroRow.Entry) b).getColBytes(0));
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} /* else if ((a instanceof Integer) && (b instanceof Integer)) {
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return ((Integer) a).compareTo((Integer) b);
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} */ else
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throw new IllegalArgumentException("Object type or Object type combination not supported: a=" + a + "[" + ((a == null) ? "" : a.getClass().getName()) + "], b=" + b + "[" + ((b == null) ? "" : b.getClass().getName()) + "]");
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}
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public byte[] zero() {
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return zero;
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}
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public void rotate(byte[] newzero) {
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this.zero = newzero;
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}
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public boolean equals(kelondroOrder otherOrder) {
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if (otherOrder == null) return false;
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String thisSig = this.signature();
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String otherSig = otherOrder.signature();
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if ((thisSig == null) || (otherSig == null)) return false;
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return thisSig.equals(otherSig);
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}
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}
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