1 files changed, 33 insertions, 0 deletions
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/Identifiable.scala b/mllib/src/main/scala/org/apache/spark/ml/util/Identifiable.scala
new file mode 100644
index 0000000000..8a56748ab0
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+++ b/mllib/src/main/scala/org/apache/spark/ml/util/Identifiable.scala
@@ -0,0 +1,33 @@
+/*
+ * 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.ml.util
+
+import java.util.UUID
+
+/**
+ * Object with a unique id.
+ */
+private[ml] trait Identifiable extends Serializable {
+
+  /**
+   * A unique id for the object. The default implementation concatenates the class name, "_", and 8
+   * random hex chars.
+   */
+  private[ml] val uid: String =
+    this.getClass.getSimpleName + "_" + UUID.randomUUID().toString.take(8)
+}