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Diffstat (limited to 'core/src/main/scala/org/apache/spark/rdd/FlatMappedValuesRDD.scala')
-rw-r--r-- | core/src/main/scala/org/apache/spark/rdd/FlatMappedValuesRDD.scala | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/spark/rdd/FlatMappedValuesRDD.scala b/core/src/main/scala/org/apache/spark/rdd/FlatMappedValuesRDD.scala new file mode 100644 index 0000000000..82000bac09 --- /dev/null +++ b/core/src/main/scala/org/apache/spark/rdd/FlatMappedValuesRDD.scala @@ -0,0 +1,36 @@ +/* + * 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.rdd + +import org.apache.spark.{TaskContext, Partition} + + +private[spark] +class FlatMappedValuesRDD[K, V, U](prev: RDD[_ <: Product2[K, V]], f: V => TraversableOnce[U]) + extends RDD[(K, U)](prev) { + + override def getPartitions = firstParent[Product2[K, V]].partitions + + override val partitioner = firstParent[Product2[K, V]].partitioner + + override def compute(split: Partition, context: TaskContext) = { + firstParent[Product2[K, V]].iterator(split, context).flatMap { case Product2(k, v) => + f(v).map(x => (k, x)) + } + } +} |