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From chinmaykolhatkar <...@git.apache.org>
Subject [GitHub] incubator-apex-malhar pull request: MLHR-1914: Add base operators ...
Date Tue, 22 Dec 2015 06:16:15 GMT
Github user chinmaykolhatkar commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-malhar/pull/142#discussion_r48224748
  
    --- Diff: library/src/main/java/com/datatorrent/lib/simple/SingleInputMultiOutput.java
---
    @@ -0,0 +1,94 @@
    +/**
    + * 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 com.datatorrent.lib.simple;
    +
    +import java.util.ArrayList;
    +import java.util.List;
    +
    +import com.datatorrent.api.DefaultInputPort;
    +import com.datatorrent.api.DefaultOutputPort;
    +import com.datatorrent.api.annotation.Name;
    +import com.datatorrent.api.annotation.Stateless;
    +import com.datatorrent.common.util.BaseOperator;
    +
    +/**
    + * A base implementation of an operator that abstracts away the input and output ports.
    + *
    + * Subclasses should provide the implementation to process a tuple of type I and return
a tuple of
    + * type O such that the return value will emit to each output port in the array.
    + *
    + * <p>
    + * <b>Input Port :</b><br>
    + * <b> input :</b> default input port. <br>
    + * <br>
    + * <b>Output Port(s) :</b><br>
    + * <b> output[] :</b> output port list that defaults to two ports. <br>
    + * <br>
    + * <b>Stateful : No</b>, all state is handled through the implementing class.
<br>
    + * <b>Partitions : Yes</b>, no dependency among input tuples. <br>
    + * <br>
    + * @displayName Single Input With Multiple Output
    + * @category Simple Operators
    + * @tags simple, single input, multiple output
    + * @param <I> type being received from the input port
    + * @param <O> type being sent from the output port
    + * @since 3.3.0
    + */
    +@Stateless
    +@Name("single-input-multi-output")
    +public abstract class SingleInputMultiOutput<I, O> extends BaseOperator
    +{
    +  protected static final int DEFAULT_NUM_OUTPUTS = 2;
    +
    +  protected transient List<DefaultOutputPort<O>> outputs = null;
    +
    +  protected final transient DefaultInputPort<I> input = new DefaultInputPort<I>()
{
    --- End diff --
    
    public input port.


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