Move modules into their own packages.

This sets the Automatic-Module-Name for moshi, moshi-adapters, and moshi-kotlin.
It moves moshi-adapters into its own .adapters package and forwards the existing
adapter. It moves the moshi-kotlin into its own .kotlin package and forwards the
existing adapter.

I'm not certain this is necessary or sufficient, but I think it's the right idea
for JPMS compatibility.

adapters/pom.xml

@@ -33,4 +33,20 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <configuration>
+          <archive>
+            <manifestEntries>
+              <Automatic-Module-Name>com.squareup.moshi.adapters</Automatic-Module-Name>
+            </manifestEntries>
+          </archive>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
 </project>

adapters/src/main/java/com/squareup/moshi/Rfc3339DateJsonAdapter.java

@@ -19,17 +19,18 @@ import java.io.IOException;
 import java.util.Date;
 
 /**
- * Formats dates using <a href="https://www.ietf.org/rfc/rfc3339.txt">RFC 3339</a>, which is
- * formatted like {@code 2015-09-26T18:23:50.250Z}.
+ * @deprecated this class moved to avoid a package name conflict in the Java Platform Module System.
+ *     The new class is {@code com.squareup.moshi.adapters.Rfc3339DateJsonAdapter}.
  */
 public final class Rfc3339DateJsonAdapter extends JsonAdapter<Date> {
-  @Override public synchronized Date fromJson(JsonReader reader) throws IOException {
-    String string = reader.nextString();
-    return Iso8601Utils.parse(string);
+  com.squareup.moshi.adapters.Rfc3339DateJsonAdapter delegate
+      = new com.squareup.moshi.adapters.Rfc3339DateJsonAdapter();
+
+  @Override public Date fromJson(JsonReader reader) throws IOException {
+    return delegate.fromJson(reader);
   }
 
-  @Override public synchronized void toJson(JsonWriter writer, Date value) throws IOException {
-    String string = Iso8601Utils.format(value);
-    writer.value(string);
+  @Override public void toJson(JsonWriter writer, Date value) throws IOException {
+    delegate.toJson(writer, value);
   }
 }

adapters/src/main/java/com/squareup/moshi/adapters/Iso8601Utils.java

@@ -13,8 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.squareup.moshi;
+package com.squareup.moshi.adapters;
 
+import com.squareup.moshi.JsonDataException;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;

adapters/src/main/java/com/squareup/moshi/adapters/Rfc3339DateJsonAdapter.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2015 Square, Inc.
+ *
+ * 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 com.squareup.moshi.adapters;
+
+import com.squareup.moshi.JsonAdapter;
+import com.squareup.moshi.JsonReader;
+import com.squareup.moshi.JsonWriter;
+import java.io.IOException;
+import java.util.Date;
+
+/**
+ * Formats dates using <a href="https://www.ietf.org/rfc/rfc3339.txt">RFC 3339</a>, which is
+ * formatted like {@code 2015-09-26T18:23:50.250Z}.
+ */
+public final class Rfc3339DateJsonAdapter extends JsonAdapter<Date> {
+  @Override public synchronized Date fromJson(JsonReader reader) throws IOException {
+    String string = reader.nextString();
+    return Iso8601Utils.parse(string);
+  }
+
+  @Override public synchronized void toJson(JsonWriter writer, Date value) throws IOException {
+    String string = Iso8601Utils.format(value);
+    writer.value(string);
+  }
+}

adapters/src/test/java/com/squareup/moshi/adapters/Rfc3339DateJsonAdapterTest.java

@@ -13,8 +13,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.squareup.moshi;
+package com.squareup.moshi.adapters;
 
+import com.squareup.moshi.JsonAdapter;
+import com.squareup.moshi.adapters.Rfc3339DateJsonAdapter;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;