1 files changed, 39 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/spark/api/java/function/Function.java b/core/src/main/scala/org/apache/spark/api/java/function/Function.java
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@@ -0,0 +1,39 @@
+/*
+ * 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.api.java.function;
+
+import scala.reflect.ClassManifest;
+import scala.reflect.ClassManifest$;
+import scala.runtime.AbstractFunction1;
+
+import java.io.Serializable;
+
+
+/**
+ * Base class for functions whose return types do not create special RDDs. PairFunction and
+ * DoubleFunction are handled separately, to allow PairRDDs and DoubleRDDs to be constructed
+ * when mapping RDDs of other types.
+ */
+public abstract class Function<T, R> extends WrappedFunction1<T, R> implements Serializable {
+  public abstract R call(T t) throws Exception;
+
+  public ClassManifest<R> returnType() {
+    return (ClassManifest<R>) ClassManifest$.MODULE$.fromClass(Object.class);
+  }
+}
+