//isConvertable = the parameter does the work itself
boolean isConvertable = !usesConvertable && !usesConverter;
if (usesConvertable && usesConverter)
{
throw( new AnnotationException( "Parameter can only be either a convertable or use a parameter converter, not both at a time!" ) );
}
if (isConvertable)
{
convertableCls = validateConvertableClass( apiParameterClass, xmlRpcType );