/**
* ========================================
* JFreeReport : a free Java report library
* ========================================
*
* Project Info: http://reporting.pentaho.org/
*
* (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
*
* 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.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: GenericValueConverter.java 6659 2008-12-02 15:35:06Z tmorgner $
* ------------
* (C) Copyright 2000-2005, by Object Refinery Limited.
* (C) Copyright 2005-2007, by Pentaho Corporation.
*/
package org.jfree.report.util.beans;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.beans.PropertyEditor;
/**
* A class that handles the conversion of {@link Integer} attributes to and from their
* {@link String} representation.
*
* @author Thomas Morgner
*/
public class GenericValueConverter implements ValueConverter
{
private PropertyDescriptor propertyDescriptor;
private PropertyEditor propertyEditor;
/**
* Creates a new value converter.
*/
public GenericValueConverter (final PropertyDescriptor pd)
throws IntrospectionException
{
if (pd == null)
{
throw new NullPointerException("PropertyDescriptor must not be null.");
}
if (pd.getPropertyEditorClass() == null)
{
throw new IntrospectionException("Property has no editor.");
}
this.propertyDescriptor = pd;
this.propertyEditor = createPropertyEditor(pd);
}
private PropertyEditor createPropertyEditor (final PropertyDescriptor pi)
throws IntrospectionException
{
final Class c = pi.getPropertyEditorClass();
try
{
return (PropertyEditor) c.newInstance();
}
catch (Exception e)
{
throw new IntrospectionException("Unable to create PropertyEditor.");
}
}
/**
* Converts the attribute to a string.
*
* @param o the attribute ({@link Integer} expected).
* @return A string representing the {@link Integer} value.
* @throws BeanException if there was an error during the conversion.
*/
public String toAttributeValue (final Object o) throws BeanException
{
if (BeanUtility.getPropertyType(propertyDescriptor).isInstance(o) == false)
{
throw new ClassCastException("Give me a real type.");
}
propertyEditor.setValue(o);
return propertyEditor.getAsText();
}
/**
* Converts a string to a {@link Integer}.
*
* @param s the string.
* @return a {@link Integer}.
*/
public Object toPropertyValue (final String s)
{
propertyEditor.setAsText(s);
return propertyEditor.getValue();
}
}