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<H2>Class and Dynamic Modeling — Solution</H2>
<P><B>Noun Extraction</B>.<BR></P>
<P>Nouns which correspond to candidate classes:</P>
<BLOCKQUOTE>
<P><B>connection <BR>shopping basket <BR>shipping type
<BR>invoice<BR>order<BR>order history <BR>product<BR>product
catalog</B><BR></P></BLOCKQUOTE>
<P>Nouns which correspond to user interface objects:</P>
<BLOCKQUOTE>
<P><B>username<BR>password <BR>Add to Basket button<BR>the Delete from
Basket button<BR>the Empty Basket button<BR>the Submit Order
button<BR>Login button <BR>Logout button <BR>a radio button indicating a
particular shipping type<BR>a text area reserved for item quantity<BR>a
pop-up interface with a list of past orders<BR>Order History button<BR>a
list of timestamps<BR>an item in the order history<BR>a list of product
names </B></P></BLOCKQUOTE>
<P>Nouns which are not modeled as classes:</P>
<BLOCKQUOTE>
<P><B>timestamp: </B>an attribute of objects rather than an object
itself<B><BR>interface</B>: refers to whole collection of components,
not a specific class or object<BR><B>empty fields</B>: refers to an
empty state of interface components<BR><B>exception</B>: already part of
Java<BR><B>mouse</B>: outside the scope of the system, which will rely
on user interface components to handle mouse events <BR><B>Field</B>:
generic reference to some concrete user interface object
<BR><B>information which depends on shipping type</B>: vague way of
referring to invoice<BR><B>the catalog list</B>: redundant with list of
product names<BR><B>product name</B>: redundant with
product<BR><B>integer</B>: part of Java <BR><B>system</B>: too abstract,
refers to the actions of the entire collection of objects<BR><B>bad
value</B>: refers to a value of an attribute, not an
object<BR><B>database</B>: only need to model the connection, not the
database itself (outside scope) <BR><B>user</B>: outside scope (only
need username)</P></BLOCKQUOTE>
<P><B>Preliminary Class Diagram in UML:</B></P>
<P>The graphical user interface is modeled as a single class; for
simplicity we do not model all interface objects separately (buttons,
etc.).</P>
<P> </P>
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src="Class and Dynamic Modeling — Solution.files/ssd9_prelimclass.gif"
width=481></P>
<P> </P>
<P><B>State Transition Diagram in UML:</B></P>
<P>We assume that the system has no response if an event occurs in the
interface control loop which does not match an event / predicate
transition in the model.</P>
<P> </P>
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ssd9 exercise4.rar （3个子文件） 
exercise4 Class and Dynamic Modeling — Solution.files 
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yanwenhao02012-11-08作者还是很不错~~~- 小米_dolphin2012-12-10还行，是有用的
