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From tillrohrmann <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-2627][utils]Make Scala Data Set utils e...
Date Mon, 07 Sep 2015 15:23:59 GMT
Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1099#discussion_r38869114
  
    --- Diff: flink-scala/src/main/scala/org/apache/flink/api/scala/utils/package.scala ---
    @@ -0,0 +1,124 @@
    +/*
    + * 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.flink.api.scala
    +
    +import org.apache.flink.api.common.ExecutionConfig
    +import org.apache.flink.api.common.typeinfo.{BasicTypeInfo, TypeInformation}
    +import org.apache.flink.api.common.typeutils.TypeSerializer
    +import org.apache.flink.api.java.Utils
    +import org.apache.flink.api.java.utils.{DataSetUtils => jutils}
    +import org.apache.flink.api.scala.typeutils.{CaseClassSerializer, CaseClassTypeInfo}
    +
    +import _root_.scala.language.implicitConversions
    +import _root_.scala.reflect.ClassTag
    +
    +package object utils {
    +
    +  /**
    +   * This class provides simple utility methods for zipping elements in a data set with
an index
    +   * or with a unique identifier, sampling elements from a data set.
    +   *
    +   * @param self Data Set
    +   */
    +
    +  implicit class DataSetUtils[T: TypeInformation: ClassTag](val self: DataSet[T]) {
    +
    +    implicit val tupleTypeInformation = new CaseClassTypeInfo[(Long, T)](
    +      classOf[(Long, T)],
    --- End diff --
    
    Didn't `createTypeInformation[(Long, T)]` work?


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