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diff --git a/subversion/bindings/javahl/native/Iterator.cpp b/subversion/bindings/javahl/native/Iterator.cpp
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+++ b/subversion/bindings/javahl/native/Iterator.cpp
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+/**
+ * @copyright
+ * ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one
+ *    or more contributor license agreements.  See the NOTICE file
+ *    distributed with this work for additional information
+ *    regarding copyright ownership.  The ASF licenses this file
+ *    to you 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.
+ * ====================================================================
+ * @endcopyright
+ *
+ * @file Iterator.cpp
+ * @brief Implementation of the class Iterator
+ */
+
+#include "Iterator.h"
+
+namespace {
+jobject init_iterator(jobject jiterable, bool persistent)
+{
+  // A null iterable is allowed, we'll leave the iterator null and
+  // nothing will happen in hasNext() and next().
+  if (!jiterable)
+    return NULL;
+
+  JNIEnv* env = JNIUtil::getEnv();
+
+  static jmethodID iterator_mid = 0;
+  if (0 == iterator_mid)
+    {
+      jclass cls = env->FindClass("java/lang/Iterable");
+      if (JNIUtil::isExceptionThrown())
+        return NULL;
+      iterator_mid = env->GetMethodID(cls, "iterator",
+                                      "()Ljava/util/Iterator;");
+      if (JNIUtil::isExceptionThrown())
+        return NULL;
+    }
+
+  jobject jiterator = env->CallObjectMethod(jiterable, iterator_mid);
+  if (JNIUtil::isExceptionThrown())
+    return NULL;
+  return (persistent ? env->NewGlobalRef(jiterator) : jiterator);
+}
+} // anonymous namespace
+
+
+Iterator::Iterator(jobject jiterable)
+  : m_persistent(false),
+    m_jiterator(init_iterator(jiterable, false))
+{}
+
+Iterator::Iterator(jobject jiterable, bool)
+  : m_persistent(true),
+    m_jiterator(init_iterator(jiterable, true))
+{}
+
+Iterator::~Iterator()
+{
+  if (m_persistent && m_jiterator)
+    JNIUtil::getEnv()->DeleteGlobalRef(m_jiterator);
+}
+
+bool Iterator::hasNext() const
+{
+  if (!m_jiterator)
+    return false;
+
+  JNIEnv* env = JNIUtil::getEnv();
+
+  static jmethodID hasNext_mid = 0;
+  if (0 == hasNext_mid)
+    {
+      jclass cls = env->FindClass("java/util/Iterator");
+      if (JNIUtil::isExceptionThrown())
+        return false;
+      hasNext_mid = env->GetMethodID(cls, "hasNext", "()Z");
+      if (JNIUtil::isExceptionThrown())
+        return false;
+    }
+
+  return bool(env->CallBooleanMethod(m_jiterator, hasNext_mid));
+}
+
+jobject Iterator::next() const
+{
+  if (!m_jiterator)
+    return NULL;
+
+  JNIEnv* env = JNIUtil::getEnv();
+
+  static jmethodID next_mid = 0;
+  if (0 == next_mid)
+    {
+      jclass cls = env->FindClass("java/util/Iterator");
+      if (JNIUtil::isExceptionThrown())
+        return NULL;
+      next_mid = env->GetMethodID(cls, "next", "()Ljava/lang/Object;");
+      if (JNIUtil::isExceptionThrown())
+        return NULL;
+    }
+
+  return env->CallObjectMethod(m_jiterator, next_mid);
+}