The TypeResolver class
The Email Experience Manager (EXM) enables you to create different types of messages. To map a message type to the appropriate class in code, EXM uses the TypeResolver class.
EXM provides the following message type classes that are derived from the MessageItem base abstract class:
-
TextMail -
HtmlMail -
WebPageMail -
ABTestMessage
For customization purposes, you can create a custom message type class to be used in EXM or delete any of the existing classes.
Depending on the item type, the GetCorrectMessageObject method of the TypeResolver class returns:
-
For not a message item, the method returns
null. -
For a message item, the method returns one of the following types – text mail, HTML mail, webpage mail, or A/B test message.
The following table shows how EXM message templates correspond to the message type classes:
|
Message template |
Message type class |
|---|---|
|
HTML file |
The |
|
Announcement |
The |
|
Alternating Columns |
The |
|
Call to Action Focus |
The |
|
Image Focus |
The |
|
Left Image Block |
The |
|
Right Image Block |
The |
|
Simple HTML Message |
The |
|
Plain Text Message |
The |
|
Existing Page |
The |
The ABTestMessage class is a descendant of the WebPageMail class. It is generally used for messages that contain two or more testable variations, except for the HTML file template, which does not support A/B testing. A/B tests also cannot be performed on the message types that are mapped to the other classes: Simple HTML Message, Plain Text Message, and Existing Page.