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diff --git a/sfntly/port/java_iterator.h b/sfntly/port/java_iterator.h
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+/*
+ * Copyright 2011 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
+#define SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_
+
+#include "sfntly/port/refcount.h"
+
+// Interface of Java iterator.
+// This is a forward read-only iterator that represents java.util.Iterator<E>
+
+namespace sfntly {
+
+template <typename ReturnType, typename ContainerBase>
+class Iterator : public virtual RefCount {
+ public:
+  virtual ~Iterator() {}
+  virtual ContainerBase* container_base() = 0;
+
+ protected:
+  Iterator() {}
+  NO_COPY_AND_ASSIGN(Iterator);
+};
+
+template <typename ReturnType, typename Container,
+          typename ContainerBase = Container>
+class PODIterator : public Iterator<ReturnType, ContainerBase>,
+                    public RefCounted< PODIterator<ReturnType, Container> > {
+ public:
+  explicit PODIterator(Container* container) : container_(container) {}
+  virtual ~PODIterator() {}
+  virtual ContainerBase* container_base() {
+    return static_cast<ContainerBase*>(container_);
+  }
+
+  virtual bool HasNext() = 0;
+  virtual ReturnType Next() = 0;
+  virtual void Remove() {
+#if !defined (SFNTLY_NO_EXCEPTION)
+    // Default to no support.
+    throw UnsupportedOperationException();
+#endif
+  }
+
+ protected:
+  Container* container() { return container_; }
+
+ private:
+  Container* container_;  // Dumb pointer is used to avoid circular ref-counting
+};
+
+template <typename ReturnType, typename Container,
+          typename ContainerBase = Container>
+class RefIterator : public Iterator<ReturnType, ContainerBase>,
+                    public RefCounted< RefIterator<ReturnType, Container> > {
+ public:
+  explicit RefIterator(Container* container) : container_(container) {}
+  virtual ~RefIterator() {}
+  virtual ContainerBase* container_base() {
+    return static_cast<ContainerBase*>(container_);
+  }
+
+  virtual bool HasNext() = 0;
+  CALLER_ATTACH virtual ReturnType* Next() = 0;
+  virtual void Remove() {
+#if !defined (SFNTLY_NO_EXCEPTION)
+    // Default to no support.
+    throw UnsupportedOperationException();
+#endif
+  }
+
+ protected:
+  Container* container() { return container_; }
+
+ private:
+  Container* container_;  // Dumb pointer is used to avoid circular ref-counting
+};
+
+}  // namespace sfntly
+
+#endif  // SFNTLY_CPP_SRC_SFNTLY_PORT_JAVA_ITERATOR_H_