Sets the result of an expression evaluation based on the value of the attributes. If "scope" the is present, but has a zero length or is equal to the string "page", TagException is thrown with an informative error message, ensuring page location information is saved.
This handler operates in one of two ways.
The user has set "var", "value" and (optionally) "scope" attributes.
The user has set "target", "property", and "value" attributes.
The first case takes precedence over the second.
Name of the exported scoped variable to hold the value specified in the action. The type of the scoped variable is whatever type the value expression evaluates to.
javax.el.ValueExpression (must evaluate to java.lang.Object)
Expression to be evaluated.
Target object whose property will be set. Must evaluate to a JavaBeans object with setter property property, or to a java.util.Map object.
Name of the property to be set in the target object.