Configuring JavaServer Faces Applications - The Java EE 6 Tutorial: Advanced Topics - page 155

Initializing Properties Using the managed-property Element
A managed-property element must contain a property-name element, which
must match the name of the corresponding property in the bean. A managed-prop-
erty element must also contain one of a set of elements that defines the value of the
property. This value must be of the same type as that defined for the property in the cor-
responding bean. Which element you use to define the value depends on the type of the
property defined in the bean. Table 7-1 lists all the elements that are used to initialize a
value.
TABLE 7-1. Subelements of managed-property Elements That Define Property
Values
“ Using the managed-bean Element ” on page 147 includes an example of initializing
an int property (a primitive type) using the value subelement. You also use the value
subelement to initialize String and other reference types. The rest of this section de-
scribes how to use the value subelement and other subelements to initialize properties of
Java Enum types, Map , array , and Collection , as well as initialization parameters.
Referencing a Java Enum Type
A managed bean property can also be a Java Enum type (see ht-
tp://docs.oracle.com/javase/6/docs/api/java/lang/Enum.html ) .
In this case, the value element of the managed-property element must be a
String that matches one of the String constants of the Enum . In other words, the
String must be one of the valid values that can be returned if you were to call
valueOf(Class, String) on enum , where Class is the Enum class and String
is the contents of the value subelement. For example, suppose the managed bean prop-
erty is the following: