The FavaBeans framework includes two pre-defined subclasses of Type; both are depicted in Figure 3.1.

Class JavaType is a simple extension of Type which describes a single Java class or interface. Accordingly, it is constructed with one Class argument.

A DataSourceType represents a type of MIME-typed data stream. It is a bridge to the type system defined by the Java Activation Framework (JAF), and especially to class DataSource. As such, given:

String mimetype = "text/html"; // for example . . . Type[] supers = new DataSourceType(mimeType).getSupertypes();

the following is always true:

(supers.length == 1) && supers[0].equals(new JavaType(javax.activation.DataSource));