Add mapper to import domains from RDE deposits

With some additional cleanup by Ben McIlwain.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=146695665

javatests/google/registry/xjc/JaxbFragmentTest.java

@@ -0,0 +1,58 @@
+// Copyright 2017 The Nomulus Authors. 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.
+
+package google.registry.xjc;
+
+import static com.google.common.truth.Truth.assertThat;
+import static google.registry.util.ResourceUtils.readResourceUtf8;
+
+import google.registry.xjc.rdehost.XjcRdeHostElement;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+@RunWith(JUnit4.class)
+public class JaxbFragmentTest {
+
+  private static final String HOST_FRAGMENT =
+      readResourceUtf8(XjcObjectTest.class, "testdata/host_fragment.xml");
+
+  /** Verifies that a {@link JaxbFragment} can be serialized and deserialized successfully. */
+  @SuppressWarnings("unchecked")
+  @Test
+  public void testJavaSerialization() throws Exception {
+    // Load rdeHost xml fragment into a jaxb object, wrap it, marshal, unmarshal, verify host.
+    // The resulting host name should be "ns1.example1.test", from the original xml fragment.
+    try (InputStream source = new ByteArrayInputStream(HOST_FRAGMENT.getBytes())) {
+      // Load xml
+      JaxbFragment<XjcRdeHostElement> hostFragment =
+          JaxbFragment.create(XjcXmlTransformer.unmarshal(XjcRdeHostElement.class, source));
+      // Marshal
+      ByteArrayOutputStream bout = new ByteArrayOutputStream();
+      new ObjectOutputStream(bout).writeObject(hostFragment);
+      // Unmarshal
+      ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bout.toByteArray()));
+      JaxbFragment<XjcRdeHostElement> restoredHostFragment =
+          (JaxbFragment<XjcRdeHostElement>) in.readObject();
+      // Verify host name
+      assertThat(restoredHostFragment.getInstance().getValue().getName())
+          .isEqualTo("ns1.example1.test");
+    }
+  }
+}