Added StringUtils class for frequently needed string manipulation routine

src/helma/util/StringUtils.java

@@ -0,0 +1,51 @@
+/*
+ * Helma License Notice
+ *
+ * The contents of this file are subject to the Helma License
+ * Version 2.0 (the "License"). You may not use this file except in
+ * compliance with the License. A copy of the License is available at
+ * http://adele.helma.org/download/helma/license.txt
+ *
+ * Copyright 1998-2003 Helma Software. All Rights Reserved.
+ *
+ * $RCSfile$
+ * $Author$
+ * $Revision$
+ * $Date$
+ */
+
+package helma.util;
+
+
+import java.util.StringTokenizer;
+
+/**
+ * Utility class for String manipulation.
+ */
+public class StringUtils {
+
+
+    /**
+     *  Split a string into an array of strings. Use comma and space
+     *  as delimiters.
+     */
+    public static String[] split(String str) {
+        return split(str, ", \t\n\r\f");
+    }
+
+    /**
+     *  Split a string into an array of strings.
+     */
+    public static String[] split(String str, String delim) {
+        if (str == null) {
+            return new String[0];
+        }
+        StringTokenizer st = new StringTokenizer(str, delim);
+        String[] s = new String[st.countTokens()];
+        for (int i=0; i<s.length; i++) {
+            s[i] = st.nextToken();
+        }
+        return s;
+    }
+
+}