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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 spark.rdd
import spark.{RDD, SparkContext, SparkEnv, Partition, TaskContext}
/**
* An RDD that is empty, i.e. has no element in it.
*/
class EmptyRDD[T: ClassManifest](sc: SparkContext) extends RDD[T](sc, Nil) {
override def getPartitions: Array[Partition] = Array.empty
override def compute(split: Partition, context: TaskContext): Iterator[T] = {
throw new UnsupportedOperationException("empty RDD")
}
}
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