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From "Ivan Hristov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LANG-895) Improving StringUtils#substringAfterLast
Date Thu, 23 May 2013 12:51:20 GMT

    [ https://issues.apache.org/jira/browse/LANG-895?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13665127#comment-13665127
] 

Ivan Hristov commented on LANG-895:
-----------------------------------

Here is a possible implementation of the new method public static String substringAfterLast(String
str, String separator, String defaultValue):

public static String substringAfterLast(String str, String separator, String defaultValue)
{
 if (isEmpty(str)) {
            return str;
        }
        if (isEmpty(separator)) {
            return EMPTY;
        }
        int pos = str.lastIndexOf(separator);
        if (pos == INDEX_NOT_FOUND || pos == str.length() - separator.length()) {
            return defaultValue;
        }
        return str.substring(pos + separator.length());
}

And the refactored, old method public static String substringAfterLast(String str, String
separator) could be implemented as follows:

public static String substringAfterLast(String str, String separator) {
   return substringAfterLast(str, separator, EMPTY);
}

Cheers,
Ivan
                
> Improving StringUtils#substringAfterLast
> ----------------------------------------
>
>                 Key: LANG-895
>                 URL: https://issues.apache.org/jira/browse/LANG-895
>             Project: Commons Lang
>          Issue Type: New Feature
>          Components: lang.*
>    Affects Versions: 3.1
>         Environment: any
>            Reporter: Ivan Hristov
>            Priority: Minor
>             Fix For: 3.2
>
>
> At the moment, we have the following method public static String substringAfterLast(String
str, String separator) in the class StringUtils which returns an empty string in case no separator
is present. I think, it would be handy to be able to control what is returned in case no separator
is found. For this reason, I would propose to have a method with the following signature:
> public static String substringAfterLast(String str, String separator, String defaultValue).
The same proposal holds for public static String substringAfter(String str, String separator).
>  

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