Package org.pentaho.reporting.engine.classic.core.modules.parser.ext.factory.base

Source Code of org.pentaho.reporting.engine.classic.core.modules.parser.ext.factory.base.Rectangle2DObjectDescription

/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors..  All rights reserved.
*/

package org.pentaho.reporting.engine.classic.core.modules.parser.ext.factory.base;

import java.awt.geom.Rectangle2D;

/**
* An object-description for a <code>Rectangle2D</code> object.
*
* @author Thomas Morgner
*/
public class Rectangle2DObjectDescription extends AbstractObjectDescription
{

  /**
   * Creates a new object description.
   */
  public Rectangle2DObjectDescription()
  {
    super(Rectangle2D.class);
    setParameterDefinition("width", Float.class);
    setParameterDefinition("height", Float.class);
    setParameterDefinition("x", Float.class);
    setParameterDefinition("y", Float.class);
  }

  /**
   * Creates an object based on this description.
   *
   * @return The object.
   */
  public Object createObject()
  {
    final Rectangle2D rect = new Rectangle2D.Float();

    final float w = getFloatParameter("width");
    final float h = getFloatParameter("height");
    final float x = getFloatParameter("x");
    final float y = getFloatParameter("y");
    rect.setRect(x, y, w, h);
    return rect;
  }

  /**
   * 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 <code>Rectangle2D</code>).
   * @throws ObjectFactoryException if the object is not an instance of <code>Rectangle2D</code>.
   */
  public void setParameterFromObject(final Object o) throws ObjectFactoryException
  {
    if (!(o instanceof Rectangle2D))
    {
      throw new ObjectFactoryException("The given object is no java.awt.geom.Rectangle2D.");
    }

    final Rectangle2D rect = (Rectangle2D) o;
    final float x = (float) rect.getX();
    final float y = (float) rect.getY();
    final float w = (float) rect.getWidth();
    final float h = (float) rect.getHeight();

    setParameter("x", new Float(x));
    setParameter("y", new Float(y));
    setParameter("width", new Float(w));
    setParameter("height", new Float(h));
  }

}
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