ggregory 2003/10/28 17:49:47
Modified: lang/src/java/org/apache/commons/lang StringUtils.java
Log:
Added public static String removeStart(String str, String remove).
Revision Changes Path
1.113 +36 -1
jakarta-commons/lang/src/java/org/apache/commons/lang/StringUtils.java
Index: StringUtils.java
===================================================================
RCS file:
/home/cvs/jakarta-commons/lang/src/java/org/apache/commons/lang/StringUtils.java,v
retrieving revision 1.112
retrieving revision 1.113
diff -u -r1.112 -r1.113
--- StringUtils.java 23 Oct 2003 20:49:22 -0000 1.112
+++ StringUtils.java 29 Oct 2003 01:49:47 -0000 1.113
@@ -4353,4 +4353,39 @@
return a;
}
+ /**
+ * <p>Removes a substring only if it is at the begining of a source string,
otherwise returns the source string.
+ *
+ * <p>A <code>null</code> source string will return <code>null</code>.
+ * An empty ("") source string will return the empty string.
+ * A <code>null</code> search string will return the source string.</p>
+ *
+ * <pre>
+ * StringUtils.removeStart(null, *) = null
+ * StringUtils.removeStart("", *) = ""
+ * StringUtils.removeStart(*, null) = *
+ * StringUtils.removeStart("www.domain.com", "www.") = "domain.com"
+ * StringUtils.removeStart("domain.com", "www.") = "domain.com"
+ * StringUtils.removeStart("abc", "") = "abc"
+ * </pre>
+ *
+ * @param string the source String to search, may be null
+ * @param remove the String to search for, may be null
+ * @return the substring after the optional occurrence of the separator,
+ * <code>null</code> if null String input
+ */
+ public static String removeStart(String str, String remove) {
+ if (str == null || str.length() == 0) {
+ return str;
+ }
+ if (remove == null || remove.length() == 0) {
+ return str;
+ }
+ int pos = str.indexOf(remove);
+ if (pos == -1) {
+ return str;
+ }
+ return str.substring(pos + remove.length());
+ }
+
}
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