diff options
author | Pekka Enberg <penberg@kernel.org> | 2011-01-26 21:32:06 +0000 |
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committer | Pekka Enberg <penberg@kernel.org> | 2011-01-26 21:32:06 +0000 |
commit | d7390c930d8f10c84902ee8ec008735939584541 (patch) | |
tree | f65b9f3565cf4b96fb62ca897c78b6441f872f03 /java | |
parent | 2ca622f0a755dd2cade32f4624fe7ab39096d288 (diff) | |
download | classpath-d7390c930d8f10c84902ee8ec008735939584541.tar.gz |
Implement Pattern.quote() API method
Reviewed-by: Dr Andrew John Hughes <gnu_andrew@member.fsf.org>
2010-07-02 Ivan Maidanski <ivmai@mail.ru>
* java/util/regex/Pattern.java:
(quote): Implement new 1.5 Java API method.
Diffstat (limited to 'java')
-rw-r--r-- | java/util/regex/Pattern.java | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/java/util/regex/Pattern.java b/java/util/regex/Pattern.java index 7d1fc84b4..b1c937f78 100644 --- a/java/util/regex/Pattern.java +++ b/java/util/regex/Pattern.java @@ -1,5 +1,6 @@ /* Pattern.java -- Compiled regular expression ready to be applied. - Copyright (C) 2002, 2004, 2005, 2007 Free Software Foundation, Inc. + Copyright (C) 2002, 2004, 2005, 2007, 2010 + Free Software Foundation, Inc. This file is part of GNU Classpath. @@ -37,6 +38,8 @@ exception statement from your version. */ package java.util.regex; +import gnu.java.lang.CPStringBuilder; + import gnu.java.util.regex.RE; import gnu.java.util.regex.REException; import gnu.java.util.regex.RESyntax; @@ -260,6 +263,41 @@ public final class Pattern implements Serializable } /** + * Returns a literal pattern for the specified String. + * + * @param String to return a literal pattern for. + * @return a literal pattern for the specified String. + * @exception NullPointerException if str is null. + * @since 1.5 + */ + public static String quote(String str) + { + int eInd = str.indexOf("\\E"); + if (eInd < 0) + { + // No need to handle backslashes. + return "\\Q" + str + "\\E"; + } + + CPStringBuilder sb = new CPStringBuilder(str.length() + 16); + sb.append("\\Q"); // start quote + + int pos = 0; + do + { + // A backslash is quoted by another backslash; + // 'E' is not needed to be quoted. + sb.append(str.substring(pos, eInd)) + .append("\\E" + "\\\\" + "E" + "\\Q"); + pos = eInd + 2; + } while ((eInd = str.indexOf("\\E", pos)) >= 0); + + sb.append(str.substring(pos, str.length())) + .append("\\E"); // end quote + return sb.toString(); + } + + /** * Return the regular expression used to construct this object. * @specnote Prior to JDK 1.5 this method had a different behavior * @since 1.5 |