ObjectAsValuePropertyAdapter.java

package fr.lteconsulting.hexa.databinding.propertyadapters;

import fr.lteconsulting.hexa.client.tools.Action2;

/**
 * This property adapter takes an object and uses it as the property value.
 * It is thus not possible for this adapter to accept new values. It will
 * throw an exception in that case.
 * 
 * @author Arnaud Tournier
 * (c) LTE Consulting - 2015
 * http://www.lteconsulting.fr
 *
 */
public class ObjectAsValuePropertyAdapter implements PropertyAdapter
{
	private final Object source;
	
	public ObjectAsValuePropertyAdapter( Object source)
	{
		this.source = source;
	}
	
	@Override
	public void setValue( Object object )
	{
		throw new IllegalStateException( "setValue impossible !" );
	}

	@Override
	public void removePropertyChangedHandler( Object handlerRegistration )
	{
	}

	@Override
	public Object registerPropertyChanged( Action2<PropertyAdapter, Object> callback, Object cookie )
	{
		return null;
	}

	@Override
	public Object getValue()
	{
		return source;
	}
}