THIS scope variables simply mean the variable is a public memory structure.
Every CFC has a public memory structure. For the most part, these are
either functions or variables spaces that can be accessed by a calling
application.
A CFC itself defines an encapsulated memory structure. Its definition is a
potential instance of an object. Encapsulation is a design decision. Data
hiding is not encapsulation. The common technique for implementing data
hiding is using getter and setter functions to access private
variables. Getter and setters can be used to very effectively on public
variables just as well as private variables. (See table wrapper CFC
generated by CFSQLtool for practical examples.)
If an application has overloaded use of a CFC for data type changes, getter
and setter are worth considering. Some examples of OO overstate
encapsulation to include data hiding. Which is fine as long as the meaning
is obvious. Data hiding may be useful when functions are overloaded.
Public variables are practical. For me, CFC public variables are very
productive. Once a memory structure is instanced as an object, it's
structure is well defined. Instances of public variables are easy to
reference by simple assignment whereas to reference private variables
requires get and set functions.
Some descriptions of "encapsulation" may better described as overloading.
For example, a function that calculates price of gas can be overloaded with
volume types of either gallons or liters.
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