--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/reflect/SignatureIterator.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2001 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.reflect;
+
+/** Assists in iterating down a method's signature */
+
+public class SignatureIterator {
+    private String sig;
+    private int idx;
+
+    public SignatureIterator(String sig) {
+        this.sig = sig;
+        reset();
+    }
+
+    public void reset() {
+        idx = 1;
+    }
+
+    public boolean atEnd() {
+        return sig.charAt(idx) == ')';
+    }
+
+    public String next() {
+        if (atEnd()) return null;
+        char c = sig.charAt(idx);
+        if (c != '[' && c != 'L') {
+            ++idx;
+            return new String(new char[] { c });
+        }
+        // Walk forward to end of entry
+        int endIdx = idx;
+        if (c == '[') {
+            while ((c = sig.charAt(endIdx)) == '[') {
+                endIdx++;
+            }
+        }
+
+        if (c == 'L') {
+            while (sig.charAt(endIdx) != ';') {
+                endIdx++;
+            }
+        }
+
+        int beginIdx = idx;
+        idx = endIdx + 1;
+        return sig.substring(beginIdx, idx);
+    }
+
+    /** Should only be called when atEnd() is true. Does not change
+        state of iterator. */
+    public String returnType() {
+        if (!atEnd()) {
+            throw new InternalError("Illegal use of SignatureIterator");
+        }
+        return sig.substring(idx + 1, sig.length());
+    }
+}