Bug 104986 Backgound image uses an absolute path
Currently Chart uses an absolute path to indicate a backgournd image, that may cause the design unusable on other environments. Expected the background image can be definded in multiple ways like in report designer. e.g. URI(absolute path), File(relative path), Embedded Image(Encoded Image Data).
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/impl/AttributeFactoryImpl.java
import org.eclipse.birt.chart.model.attribute.VerticalAlignment;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EDataType;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.impl.EFactoryImpl;
import org.eclipse.emf.ecore.xml.type.XMLTypeFactory;
import org.eclipse.emf.ecore.xml.type.XMLTypePackage;
/**
 * <!-- begin-user-doc --> An implementation of the model <b>Factory </b>. <!--
 * end-user-doc -->
 * @generated
 */
public class AttributeFactoryImpl extends EFactoryImpl implements
		AttributeFactory
{
	/**
	 * Creates an instance of the factory.
	 * <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * @generated
	 */
	public AttributeFactoryImpl( )
	{
		super( );
	}
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public EObject create( EClass eClass )