Add NamespaceMapper

.gitignore

@@ -16,3 +16,4 @@ build/
 
 # Marquez configuration
 config.yml
+/.metadata/

src/main/java/marquez/api/mappers/NamespaceApiMapper.java

@@ -21,6 +21,7 @@
 import marquez.service.models.Namespace;
 
 public class NamespaceApiMapper extends Mapper<NamespaceResponse, Namespace> {
+
   public Namespace map(NamespaceResponse namespace) {
     requireNonNull(namespace, "namespace must not be null");
     return new Namespace(

src/main/java/marquez/api/mappers/NamespaceMapper.java

@@ -0,0 +1,34 @@
+/*
+ * 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 marquez.api.mappers;
+
+import static java.util.Objects.requireNonNull;
+import lombok.NonNull;
+import marquez.api.models.NamespaceRequest;
+import marquez.api.models.NamespaceResponse;
+import marquez.service.models.Namespace;
+import marquez.common.models.NamespaceName;
+
+public final class NamespaceMapper {
+  private NamespaceMapper() {}
+
+  public static Namespace map(@NonNull NamespaceName namespaceName, @NonNull NamespaceRequest request) {
+    return new Namespace(
+            namespaceName,
+            request.getOwner(),
+            request.getDescription().orElse(null)
+            );
+  }
+}

src/main/java/marquez/service/models/Namespace.java

@@ -17,6 +17,7 @@
 import java.sql.Timestamp;
 import java.util.UUID;
 import lombok.Data;
+import marquez.common.models.NamespaceName;
 
 @Data
 public class Namespace {
@@ -43,4 +44,11 @@ public Namespace(
     this.ownerName = ownerName;
     this.description = description;
   }
+
+  public Namespace(
+      String name, String ownerName, String description) {
+    this.name = name;
+    this.ownerName = ownerName;
+    this.description = description;
+  }
 }