Java Reference
In-Depth Information
method should not have to check that the
mementos
stack has at least one memento. But it
doesn't hurt.
SOLUTION 19.4
The latest memento contains the state to save, so the object to write to disk is
mementos.peek()
.
SOLUTION 19.5
The disadvantages of storing an object in textual format follow.
•
Encapsulation flies out the window. Anyone with a text editor can manipulate the
object's data.
•
For this approach to work, you must be able to parse the text, either using an XML
parser or writing your own parser for a proprietary format.
•
A textual representation may be much larger than an object serialization with the same
information.
On the other hand, there are many advantages to storing objects as text.
•
Anyone with a text editor can verify an object's data.
•
Anyone with a text editor can manipulate an object's data—an advantage in some
contexts.
•
It is often easier to pass text between systems than it is to set up interchange with
RMI, CORBA, or other protocols.
