export and pmml export traits

kmeans test implementation

mllib/pom.xml

@@ -98,6 +98,11 @@
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+    	<groupId>org.jpmml</groupId>
+    	<artifactId>pmml-model</artifactId>
+    	<version>1.1.7</version>
+    </dependency>
   </dependencies>
   <profiles>
     <profile>

mllib/src/main/scala/org/apache/spark/mllib/export/ModelExport.scala

@@ -0,0 +1,26 @@
+/*
+ * 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.
+ */
+
+package org.apache.spark.mllib.export
+
+import java.io.OutputStream
+
+trait ModelExport {
+
+  def save(outputStream: OutputStream): Unit
+
+}

mllib/src/main/scala/org/apache/spark/mllib/export/ModelExportFactory.scala

@@ -0,0 +1,32 @@
+/*
+ * 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.
+ */
+
+package org.apache.spark.mllib.export
+
+import org.apache.spark.mllib.clustering.KMeansModel
+import org.apache.spark.mllib.export.pmml.KMeansPMMLModelExport
+
+object ModelExportFactory {
+
+  //TODO: introduce model export typed
+
+  def createModelExport(model: Any): ModelExport = model match {
+    case kmeans: KMeansModel => new KMeansPMMLModelExport
+    case _ => throw new IllegalArgumentException("Export not supported for model " + model.getClass)
+  }
+
+}

mllib/src/main/scala/org/apache/spark/mllib/export/ModelExportType.scala

@@ -0,0 +1,25 @@
+/*
+ * 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.
+ */
+
+package org.apache.spark.mllib.export
+
+object ModelExportType extends Enumeration{
+
+  type ModelExportType = Value
+  val PMML = Value
+
+}

mllib/src/main/scala/org/apache/spark/mllib/export/pmml/KMeansPMMLModelExport.scala

@@ -0,0 +1,30 @@
+/*
+ * 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.
+ */
+
+package org.apache.spark.mllib.export.pmml
+
+class KMeansPMMLModelExport extends PMMLModelExport{
+
+  populateKMeansPMML();
+
+   def populateKMeansPMML(): Unit = {
+     //TODO: set here header description 
+     pmml.setVersion("testing... kmeans..."); 
+     //TODO: generate the model...
+  }
+
+}

mllib/src/main/scala/org/apache/spark/mllib/export/pmml/PMMLModelExport.scala

@@ -0,0 +1,37 @@
+/*
+ * 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.
+ */
+
+package org.apache.spark.mllib.export.pmml
+
+import org.apache.spark.mllib.export.ModelExport
+import java.io.OutputStream
+import org.jpmml.model.JAXBUtil
+import org.dmg.pmml.PMML
+import javax.xml.transform.stream.StreamResult
+import scala.beans.BeanProperty
+
+trait PMMLModelExport extends ModelExport{
+
+  @BeanProperty
+  var pmml: PMML = new PMML();
+  //TODO: set here header app copyright and timestamp
+
+  def save(outputStream: OutputStream): Unit = {
+    JAXBUtil.marshalPMML(pmml, new StreamResult(outputStream));  
+  }
+
+}