/* $Revision$ $Author$ $Date$
*
* Copyright (C) 2008 Egon Willighagen <egonw@users.sf.net>
*
* 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.
*
* 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.diff.tree;
import org.openscience.cdk.annotations.TestClass;
import org.openscience.cdk.annotations.TestMethod;
/**
* {@link IDifference} between two {@link Double}.
*
* @author egonw
* @cdk.module diff
*/
@TestClass("org.openscience.cdk.tools.diff.tree.DoubleDifferenceTest")
public class DoubleDifference implements IDifference {
private final static double ERROR = 0.000000001;
private String name;
private Double first;
private Double second;
private DoubleDifference(String name, Double first, Double second) {
this.name = name;
this.first = first;
this.second = second;
}
@TestMethod("testDiff,testSame,testTwoNull,testOneNull")
public static IDifference construct(String name, Double first, Double second) {
if (first == null && second == null) {
return null; // no difference
}
if (first == null || second == null) {
return new DoubleDifference(name, first, second);
}
if (Math.abs(first - second) < ERROR) {
return null; // no difference
}
return new DoubleDifference(name, first, second);
}
@TestMethod("testToString")
public String toString() {
return name + ":" +
(first == null ? "NA" : first) +
"/" +
(second == null ? "NA" : second);
}
}