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https://issues.apache.org/jira/browse/LANG-974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14173540#comment-14173540
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Stephan Knitelius commented on LANG-974:
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In our particular case we have a set of legal values and any other
value has to be defaulted to a standard value.
For example:
defaultIfNotIn("a","invalid","a","b") returns a
defaultIfNotIn("c","invalid","a","b") returns invalid
> New StringUtils Method defaulfNotIn(String, String, List<String>)
> -----------------------------------------------------------------
>
> Key: LANG-974
> URL: https://issues.apache.org/jira/browse/LANG-974
> Project: Commons Lang
> Issue Type: Wish
> Components: lang.*
> Affects Versions: 3.2.1
> Reporter: Stephan Knitelius
> Priority: Minor
> Fix For: Review Patch
>
>
> Example use case:
> If a Method expects values that should only consist of a certain set such as
> "0" and "1", and any Invalid String should be defaulted to "0".
> Possible Solution:
> {code}
> public static String defaultIfNotIn(final String str, final String
> defaultString, String... validStrings) {
> if (str == null) {
> return defaultString;
> }
> for (final String validString : validStrings) {
> if (validString.equals(str)) {
> return str;
> }
> }
> return defaultString;
> }
> {code}
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