You could reduce every method to one single return statement ;-). I get what you mean though.
Dave >From: "Jerry Jalenak" <[EMAIL PROTECTED]> >Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]> >To: "'Struts Users Mailing List'" <[EMAIL PROTECTED]> >Subject: RE: [OT - Java] How can I do this in Java? >Date: Tue, 1 Oct 2002 10:29:57 -0500 > >Once again - thanks to EVERYONE who weighted in on this. I certainly >didn't >mean to start the exchange the ensued, but wasn't it interesting? I >learned >alot about reflection, etc. from the exchanges. > >I went ahead, dumped the reflection code, and changed it all to use a >static >HashMap. Ended up reducing the overall method to 1 single return >statement! > >Way Cool!!!! > >Jerry > > > -----Original Message----- > > From: Max Cooper [mailto:[EMAIL PROTECTED]] > > Sent: Monday, September 30, 2002 5:42 PM > > To: Struts Users Mailing List > > Subject: Re: [OT - Java] How can I do this in Java? > > > > > > I agree that reflection is not a good solution here, but does > > have useful > > application in general (but it isn't needed here, so don't > > use it). Use a > > singleton or a statically-initialized Map to look up the > > patterns based on > > the state. Save yourself some time by putting Patterns in the map, > > identified by the state represented as a String. > > > > patternMap.add("AK", Pattern.compile("^[0-9]{1,7}$")); > > > > Put the map in its own class (perhaps a singleton), so you would get > > patterns from it with a call like one of these: > > > > Pattern pattern = > > LicensePatterns.getInstance().getPattern(licenseState); > > > > -or- > > > > Pattern pattern = LicensePatterns.getPattern(licenseState); > > > > Putting the patterns is a Properties file seems like a good > > idea, too. How > > often do the patterns change? Perhaps you could add a > > refresh() method to > > the singleton class to reload the patterns from the > > properties file if you > > anticipate that they will change while the app is supposed to > > be running. > > This is usually the case, but it is often overlooked when setting such > > "constants". > > > > -Max > > > > ----- Original Message ----- > > From: "Jerry Jalenak" <[EMAIL PROTECTED]> > > To: <[EMAIL PROTECTED]> > > Sent: Monday, September 30, 2002 7:49 AM > > Subject: [OT - Java] How can I do this in Java? > > > > > > > OK - off topic, but Sun's java forum sucks, and there are > > an incredible > > > number of Java guru's on this list, so I thought I'd throw > > this out here. > > > (That and I am using this in a custom validation routine > > :-)) Any help > > > would be GREATLY appreciated! > > > > > > Here's the scenario - I've got a series of static constants > > that represent > > > Java regular expressions. These RE's are used to validate > > driver license > > > formats for the 50 states + DC. The strings look like this: > > > > > > public static final String AK = "^[0-9]{1,7}$"; > > > public static final String AL = "^[0-9]{7}$"; > > > public static final String AR = "^[0-9]{8,9}$"; > > > public static final String AZ = > > > "^[0-9ABDY][0-9]{8}$|^[A-Z][0-9]{3,6}$|^[A-Z]{2}[0-9]{3,5}$"; > > > public static final String CA = "^[A-Z][0-9]{4,7}$"; > > > public static final String CO = > > > "^[A-Z][0-9]{1,6}$|^[A-Z]{2}[0-9]{1,6}$|^[0-9]{9}$"; > > > etc. etc. etc. > > > > > > On my form I have a drop-down box of states, and a field > > for the license > > > number. In my custom validator routine, I pick up the > > value of the state, > > > and build a string to represent the constant - i.e. > > > > > > private static boolean validateDriversLicenseNumber(String > > > licenseState, String licenseNumber) > > > { > > > String licenseConstant = "Constants." + licenseState; > > > > > > I then want to use "licenseConstant" in a Pattern / Match: > > > > > > Pattern p = Pattern.compile(licenseConstant, > > > Pattern.CASE_INSENSITIVE); > > > Match m = p.matcher(licenseNumber); > > > return (m.find()); > > > } > > > > > > Obviously the line "String licenseConstant = "Constants." + > > licenseState;" > > > does not give me the value of Constant.<state name>; the > > question I have > > is, > > > is there a method (or something) that will allow me to build such a > > string, > > > and return the value (i.e. the regular expression)? Or is > > there a better > > > way of doing this? > > > > > > TIA! > > > > > > Jerry Jalenak > > > Web Publishing > > > LabOne, Inc. > > > 10101 Renner Blvd. > > > Lenexa, KS 66219 > > > (913) 577-1496 > > > [EMAIL PROTECTED] > > > > > > > > > This transmission (and any information attached to it) may > > be confidential > > and is intended solely for the use of the individual or > > entity to which it > > is addressed. If you are not the intended recipient or the person > > responsible for delivering the transmission to the intended > > recipient, be > > advised that you have received this transmission in error and > > that any use, > > dissemination, forwarding, printing, or copying of this information is > > strictly prohibited. If you have received this transmission > > in error, please > > immediately notify LabOne at (800)388-4675. > > > > > > > > > > > > -- > > > To unsubscribe, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > > > > > > > > > > > > -- > > To unsubscribe, e-mail: ><mailto:[EMAIL PROTECTED]> >For additional commands, e-mail: ><mailto:[EMAIL PROTECTED]> > > >This transmission (and any information attached to it) may be confidential >and is intended solely for the use of the individual or entity to which it >is addressed. If you are not the intended recipient or the person >responsible for delivering the transmission to the intended recipient, be >advised that you have received this transmission in error and that any use, >dissemination, forwarding, printing, or copying of this information is >strictly prohibited. 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