String operation = operator.getOperation();
if( INVOKE_OPERATOR.equals(operation) )
{
COSName objectName = (COSName)arguments.get( 0 );
Map<String, PDXObject> xobjects = getResources().getXObjects();
PDXObject xobject = (PDXObject)xobjects.get( objectName.getName() );
if( xobject instanceof PDXObjectImage )
{
PDXObjectImage image = (PDXObjectImage)xobject;
PDPage page = getCurrentPage();
int imageWidth = image.getWidth();