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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I want to be able to valid<st1:PersonName w:st="on">at</st1:PersonName>e
the fields on a form using the same rules th<st1:PersonName w:st="on">at</st1:PersonName>
are used to valid<st1:PersonName w:st="on">at</st1:PersonName>e the domain
object th<st1:PersonName w:st="on">at</st1:PersonName> represents those<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Rules ..without having to check each single field th<st1:PersonName
w:st="on">at</st1:PersonName> is input with the idea to be able to valid<st1:PersonName
w:st="on">at</st1:PersonName>e a single field without having to cre<st1:PersonName
w:st="on">at</st1:PersonName>e the whole domain <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Object. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Example: <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If we have a domain object say<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> P<st1:PersonName
w:st="on">at</st1:PersonName>ron<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in;text-indent:.5in'><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>String Name<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> String
phoneNumber<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>And you have a form with the fields represented as Strings
in a request.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Name<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> PhoneNumber
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>And if the user enters his phone number I just want to run
the rule about phonenumber without firing the rule for name. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The first idea was to cre<st1:PersonName w:st="on">at</st1:PersonName>e
a class for each form field which would leverage the power of the rule engine
for example: <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>When<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> P<st1:PersonName
w:st="on">at</st1:PersonName>ron(phoneNumber not m<st1:PersonName w:st="on">at</st1:PersonName>ches
<font color=black><span style='color:black'>“ </span></font></span></font><code><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;color:black'>\(?\d{3}\)?
?\d{3}[-.]\d{4}”) <o:p></o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'>||<o:p></o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'> PhoneNumber(value
not m<st1:PersonName w:st="on">at</st1:PersonName>ches </span></font></code><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>“ </span></font><code><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;color:black'>\(?\d{3}\)?
?\d{3}[-.]\d{4}”<o:p></o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'>Then<o:p></o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'> InsertLogical(Message(“Bad
Phone”)<o:p></o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'><o:p> </o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'>But th<st1:PersonName w:st="on">at</st1:PersonName>
would mean cre<st1:PersonName w:st="on">at</st1:PersonName>ing a class for each
field, which just seems wrong. <o:p></o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'><br>
Is there a better design? <o:p></o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'><o:p> </o:p></span></font></code></p>
<p class=MsoNormal><code><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;color:black'><o:p> </o:p></span></font></code></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:PersonName w:st="on"><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Blair Christie</span></font></st1:PersonName><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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