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/*
* 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 java.lang.{Double => JDouble}
/**
* A function that returns Doubles, and can be used to construct DoubleRDDs.
*/
// DoubleFunction does not extend Function because some UDF functions, like map,
// are overloaded for both Function and DoubleFunction.
abstract class DoubleFunction[T] extends WrappedFunction1[T, JDouble] with Serializable {
// Intentionally left blank
}
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