On Mon, Sep 30, 2002 at 01:55:20PM -0500, Jerry Jalenak wrote:
> Easy, John ... step away from the keyboard ... carefully now
> ... :-)
I'm sorry about that, I don't know why I converted DL to ZIP.
The lookup table works nicely when you know you will start by
knowing the state abbreviation. I would further recommend loading
the strings from a data file, such as a Properties file. By making
the map static, you would only do this once when the class loads.
/**
* This class gets the regular expression validators for drivers
* licenses for each state.
*/
public class MyClass {
private static final String PROPFILE_NAME = "MyClass.properties";
private static final Properties s_stateToDLRegExp = new Properties();
static {
InputStream inProps = null;
try {
inProps = MyClass.class.getResourceAsStream("/" + PROPFILE_NAME);
s_stateToDLRegExp.load(inProps);
}
catch (IOException excp) {
throw new IllegalStateException("Could not init DL regexp");
excp.printStackTracke(); // log the error
}
finally {
if (inProps != null) {
try {
inProps.close();
}
catch (IOException excp) {
System.err.println("Could not cleanup properties file " + PROPFILE_NAME);
excp.printStackTrace();
}
}
}
}
public static String getDLRegExpForState(String state) {
// Handle nulls however you want here.
return s_stateToDLRegExp.getProperty(state);
}
}
> Seriously, I wasn't sure what the best way of doing this was,
> or even if it could be done. I'm still looking at the code (still
> undecided about the exceptions) and may yet end up recoding
> it as a static HashMap. I'm still learning about the in's and
> out's of reflection, and thought I'd try it this way first (always
> looking to learn something new!). Thanks for your comments though
> - and by the way, it's not zip codes, it's Drivers License numbers
> (the format of 'em, anyway!).....
Cheers,
John
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