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https://issues.apache.org/jira/browse/LANG-426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503331#comment-13503331
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Michael Knapp commented on LANG-426:
------------------------------------
I created LANG-860 and a patch for it, the issue is similar to this but more
broad. My issue allows any escape pattern to be used when splitting a string,
such as quotations around a comma. My patch also provides a solution to this
issue. The patch is attached to my issue LANG-860, a committer needs to commit
it.
> String splitting with escaped delimiter
> ---------------------------------------
>
> Key: LANG-426
> URL: https://issues.apache.org/jira/browse/LANG-426
> Project: Commons Lang
> Issue Type: New Feature
> Components: lang.text.*
> Affects Versions: 2.4
> Reporter: Emmanuel Bourg
> Priority: Minor
> Fix For: 3.x
>
> Attachments: StringUtils.java
>
>
> In Commons Configuration we use a custom split method that supports the
> concept of an escaped delimiter, that may be nice if this was available in
> Commons Lang (as a method in StringUtils, or as a setting in StrTokenizer).
> Example:
> {code}
> a,b\,c,d -> ["a", "b,c", "d"]
> {code}
> Here is the code of the method:
> {code:java}
> public static List<String> split(String s, char delimiter)
> {
> if (s == null)
> {
> return new ArrayList<String>();
> }
> List<String> list = new ArrayList<String>();
> StringBuilder token = new StringBuilder();
> int begin = 0;
> boolean inEscape = false;
> while (begin < s.length())
> {
> char c = s.charAt(begin);
> if (inEscape)
> {
> // last character was the escape marker
> // can current character be escaped?
> if (c != delimiter && c != LIST_ESC_CHAR)
> {
> // no, also add escape character
> token.append(LIST_ESC_CHAR);
> }
> token.append(c);
> inEscape = false;
> }
> else
> {
> if (c == delimiter)
> {
> // found a list delimiter -> add token and reset buffer
> list.add(token.toString().trim());
> token = new StringBuilder();
> }
> else if (c == LIST_ESC_CHAR)
> {
> // eventually escape next character
> inEscape = true;
> }
> else
> {
> token.append(c);
> }
> }
> begin++;
> }
> // Trailing delimiter?
> if (inEscape)
> {
> token.append(LIST_ESC_CHAR);
> }
> // Add last token
> list.add(token.toString().trim());
> return list;
> }
> {code}
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