[TCO-Tool_cvs] TCO-Tool/src/org/tcotool/tools CourseUtils.java,NONE,1.1

[Hirzel P. <ph...@us...>]

Update of /cvsroot/tcotool/TCO-Tool/src/org/tcotool/tools
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv4183/src/org/tcotool/tools

Added Files:
	CourseUtils.java 
Log Message:
New

--- NEW FILE: CourseUtils.java ---
package org.tcotool.tools;

/*
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
import java.util.ArrayList;

import org.tcotool.application.LauncherView;
import org.tcotool.model.Course;
import org.tcotool.model.Currency;

import ch.softenvironment.util.UserException;
/**
 * @author Peter Hirzel <i>soft</i>Environment 
 * @version $Revision: 1.1 $ $Date: 2006/05/07 14:55:32 $
 */
public class CourseUtils {
    /**
     * Return the targetAmount, which is:
     *  targetAmount = sourceAmount * factor
     * @see #getCourse(Currency, Currency)
     */
    public static double getAmount(double sourceAmount, Currency source, Currency target) throws UserException {
        return sourceAmount * getCourse(source, target);
    }
    /**
     * Return a course between source- and target-Currency.
     * @param source
     * @param target
     * @return
     * @throws UserException
     */
    public static double getCourse(Currency source, Currency target) throws UserException {
//TODO NLS
        if ((source == null) || (target == null)) {
            throw new IllegalArgumentException("source AND target must not be null");
        }
        
        if (source.equals(target)) {
            // no transformation at all
            return 1.0;
        }
        
        java.util.List list = null;
        try {
            list = LauncherView.getInstance().getUtility().getSystemParameter().getCourse();
        } catch(Throwable e) {
            LauncherView.getInstance().handleException(e);
            list = new ArrayList();
        }
        java.util.Iterator it = list.iterator();
        while (it.hasNext()) {
            Course course = (Course)it.next();
            if (source.equals(course.getSource()) && target.equals(course.getTarget())) {
                // straight
                return course.getFactor().doubleValue();
            }
            if (source.equals(course.getTarget()) && target.equals(course.getSource())) {
                // 1/x
                return 1.0 / course.getFactor().doubleValue();
            }
        }
        
        throw new UserException(CourseUtils.class, "getCourse()", "No course defined for <" + source.getNameString() + "> to <" + target.getNameString() + ">");
    }
}