org.jfree.xml.factory.objects.Point2DObjectDescription Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jtstand-common Show documentation

jtstand-common is a library derived from jcommon, used by jtstand-chart, which is derived from jfreechart

There is a newer version: 1.5.9

/*
 * Copyright (c) 2009 Albert Kurucz. 
 *
 * This file, Point2DObjectDescription.java is part of JTStand.
 *
 * JTStand 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 3 of the License, or
 * (at your option) any later version.
 *
 * JTStand 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 GTStand.  If not, see .
 */

package org.jfree.xml.factory.objects;

import java.awt.geom.Point2D;

/**
 * An object-description for a Point2D object.
 *
 * @author Thomas Morgner
 */
public class Point2DObjectDescription extends AbstractObjectDescription {

    /**
     * Creates a new object description.
     */
    public Point2DObjectDescription() {
        super(Point2D.class);
        setParameterDefinition("x", Float.class);
        setParameterDefinition("y", Float.class);
    }

    /**
     * Creates an object based on this description.
     *
     * @return The object.
     */
    public Object createObject() {
        final Point2D point = new Point2D.Float();

        final float x = getFloatParameter("x");
        final float y = getFloatParameter("y");
        point.setLocation(x, y);
        return point;
    }

    /**
     * Returns a parameter value as a float.
     *
     * @param param  the parameter name.
     *
     * @return The float value.
     */
    private float getFloatParameter(final String param) {
        final Float p = (Float) getParameter(param);
        if (p == null) {
            return 0;
        }
        return p.floatValue();
    }

    /**
     * Sets the parameters of this description object to match the supplied object.
     *
     * @param o  the object (should be an instance of Point2D).
     *
     * @throws ObjectFactoryException if the object is not an instance of Point2D.
     */
    public void setParameterFromObject(final Object o) throws ObjectFactoryException {
        if (!(o instanceof Point2D)) {
            throw new ObjectFactoryException("The given object is no java.awt.geom.Point2D.");
        }

        final Point2D point = (Point2D) o;
        final float x = (float) point.getX();
        final float y = (float) point.getY();

        setParameter("x", new Float(x));
        setParameter("y", new Float(y));
    }
}