/* $RCSfile$
* $Author$
* $Date$
* $Revision$
*
* Copyright (C) 2004-2007 The Chemistry Development Kit (CDK) project
*
* Contact: cdk-devel@lists.sourceforge.net
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
* All we ask is that proper credit is given for our work, which includes
* - but is not limited to - adding the above copyright notice to the beginning
* of your source code files, and to any copyright notice that you may distribute
* with programs based on this work.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.openscience.cdk.tools.manipulator;
import java.util.Comparator;
import org.openscience.cdk.annotations.TestClass;
import org.openscience.cdk.annotations.TestMethod;
import org.openscience.cdk.interfaces.IRing;
/**
* @cdk.module standard
* @cdk.githash
*/
@TestClass("org.openscience.cdk.tools.manipulator.RingSizeComparatorTest")
public class RingSizeComparator implements Comparator<IRing> {
/** Flag to denote that the set is order with the largest ring first */
public final static int LARGE_FIRST = 1;
/** Flag to denote that the set is order with the smallest ring first */
public final static int SMALL_FIRST = 2;
int sortOrder = SMALL_FIRST;
/**
* Constructs a new comparator to sort rings by size.
*
* @param order Sort order: either RingSet.SMALL_FIRST or
* RingSet.LARGE_FIRST.
*/
public RingSizeComparator(int order) {
sortOrder = order;
}
@TestMethod("testCompare")
public int compare(IRing object1, IRing object2) throws ClassCastException
{
int size1 = object1.getAtomCount();
int size2 = object2.getAtomCount();
if (size1 == size2) return 0;
if (size1 > size2 && sortOrder == SMALL_FIRST) {
return 1;
}
if (size1 > size2 && sortOrder == LARGE_FIRST) {
return -1;
}
if (size1 < size2 && sortOrder == SMALL_FIRST) {
return -1;
}
if (size1 < size2 && sortOrder == LARGE_FIRST) {
return 1;
}
return 0;
}
}