[Get instance type in Apex] A hack to determine the type of an instance in Apex #salesforce #apex

getType.cls

/*
 * Returns the type of a given object. This is a hack around the fact that we can't access the type of an object.
 * @param {Object} obj An object
 * @returns {Type} the type of the object
 */
private static Type getType(Object obj) {
	String typeName = 'Date';

	// Attempt to cast the object to Datetime
	// If it succeeds, the object is a date
	// If a type exception is thrown, catch it and parse the exception for the actual type
	try {
		Date d = (Date) obj;
	} catch(TypeException te) {
		String message = te.getMessage().substringAfter('Invalid conversion from runtime type ');
		typeName = message.substringBefore(' to Datetime');
	}

	return Type.forName(typeName);
}