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From "Gary D. Gregory (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LANG-841) Add StringUtils API to call String.replaceAll in DOTALL a.k.a. single-line mode
Date Wed, 10 Oct 2012 11:31:03 GMT

     [ https://issues.apache.org/jira/browse/LANG-841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary D. Gregory resolved LANG-841.
----------------------------------

       Resolution: Fixed
    Fix Version/s: 3.2
    
> Add StringUtils API to call String.replaceAll in DOTALL a.k.a. single-line mode
> -------------------------------------------------------------------------------
>
>                 Key: LANG-841
>                 URL: https://issues.apache.org/jira/browse/LANG-841
>             Project: Commons Lang
>          Issue Type: New Feature
>          Components: lang.*
>         Environment: Apache Maven 3.0.4 (r1232337; 2012-01-17 03:44:56-0500)
> Maven home: C:\Java\apache-maven-3.0.4\bin\..
> Java version: 1.6.0_35, vendor: Sun Microsystems Inc.
> Java home: C:\Program Files\Java\jdk1.6.0_35\jre
> Default locale: en_US, platform encoding: Cp1252
> OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"
>            Reporter: Gary D. Gregory
>             Fix For: 3.2
>
>         Attachments: lang-841-v3.diff
>
>
> I often want to call:
> {code:java}
> "OldValue\nOldValue".replaceAll("Regex", "NewValue")
> {code}
> where the old value has end of line chars. So I need to do this:
> {code:java}
> Pattern.compile("Regex", Pattern.DOTALL).matcher("OldValue\nOldValue").replaceAll("NewValue");
> {code}
> which I put in a util methods, which feels like it could be in StringUtils:
> {code:java}
>     /**
>      * Replaces each substring of the source String that matches the given regular expression
with the given
>      * replacement using the {@link Pattern#DOTALL} option. DOTALL is also know as single-line
mode in Perl. This call
>      * is also equivalent to:
>      * <ul>
>      * <li>{@code source.replaceAll(&quot;(?s)&quot; + regex, replacement)}</li>
>      * <li>{@code Pattern.compile(regex, Pattern.DOTALL).matcher(source).replaceAll(replacement)}</li>
>      * </ul>
>      * 
>      * @param source
>      *            the source string
>      * @param regex
>      *            the regular expression to which this string is to be matched
>      * @param replacement
>      *            the string to be substituted for each match
>      * @return The resulting {@code String}
>      * @see String#replaceAll(String, String)
>      * @see Pattern#DOTALL
>      * @since 3.2
>      */
>     public static String replaceAllPatternDotAll(String source, String regex, String
replacement) {
>         return Pattern.compile(regex, Pattern.DOTALL).matcher(source).replaceAll(replacement);
>     }
>     /**
>      * Removes each substring of the source String that matches the given regular expression
using the DOTALL option.
>      * 
>      * @param source
>      *            the source string
>      * @param regex
>      *            the regular expression to which this string is to be matched
>      * @return The resulting {@code String}
>      * @see String#replaceAll(String, String)
>      * @see Pattern#DOTALL
>      * @since 3.2
>      */
>     public static String removeAllPatternDotAll(String source, String regex) {
>         return replaceAllPatternDotAll(source, regex, StringUtils.EMPTY);
>     }
> {code}
> Patch attached. 
> Feedback? Better method names?

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