[I] what to write here [incubator-wayang]

[via GitHub]

github-actions[bot] opened a new issue, #526:
URL: https://github.com/apache/incubator-wayang/issues/526

   what to write here
   
   
https://github.com/apache/incubator-wayang/blob/3a461b516bda004c2fa7d6d4392ed0ee23da96cf/wayang-platforms/wayang-java/src/main/java/org/apache/wayang/java/operators/JavaGoogleCloudStorageSource.java#L80
   
   ```java
   
   /*
    * 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.wayang.java.operators;
   
   import java.io.BufferedReader;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.InputStreamReader;
   import java.util.Arrays;
   import java.util.Collection;
   import java.util.Collections;
   import java.util.List;
   import java.util.stream.Stream;
   
   import org.apache.wayang.basic.operators.AmazonS3Source;
   import org.apache.wayang.basic.operators.GoogleCloudStorageSource;
   import org.apache.wayang.core.api.exception.WayangException;
   import org.apache.wayang.core.optimizer.OptimizationContext;
   import org.apache.wayang.core.optimizer.OptimizationContext.OperatorContext;
   import org.apache.wayang.core.optimizer.costs.LoadProfileEstimators;
   import org.apache.wayang.core.platform.ChannelDescriptor;
   import org.apache.wayang.core.platform.ChannelInstance;
   import org.apache.wayang.core.platform.lineage.ExecutionLineageNode;
   import org.apache.wayang.core.util.Tuple;
   import org.apache.wayang.java.channels.StreamChannel;
   import org.apache.wayang.java.execution.JavaExecutor;
   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   
   public class JavaGoogleCloudStorageSource extends GoogleCloudStorageSource 
implements JavaExecutionOperator {
       private static final Logger logger = 
LoggerFactory.getLogger(JavaGoogleCloudStorageSource.class);
   
       public JavaGoogleCloudStorageSource(String bucket, String blobName, 
String filePathToCredentialsFile) {
           super(bucket, blobName, filePathToCredentialsFile);
       }
   
       public JavaGoogleCloudStorageSource(GoogleCloudStorageSource that) {
           super(that);
       }
   
   
   
   
       @Override
       public Tuple<Collection<ExecutionLineageNode>, 
Collection<ChannelInstance>> evaluate(ChannelInstance[] inputs,
               ChannelInstance[] outputs, JavaExecutor javaExecutor, 
OperatorContext operatorContext) {
           assert inputs.length == this.getNumInputs();
           assert outputs.length == this.getNumOutputs();
   
           try {
               
               BufferedReader buffereadReder = new BufferedReader(new 
InputStreamReader(super.getInputStream()));
               Stream<String> lines = buffereadReder.lines(); 
               ((StreamChannel.Instance) outputs[0]).accept(lines);
           }
           catch (Exception e) {
               throw new WayangException("Failed to read file from Google CLoud 
storage with error", e);
           }
   
   
       //TODO what to write here
        ExecutionLineageNode prepareLineageNode = new 
ExecutionLineageNode(operatorContext);
           prepareLineageNode.add(LoadProfileEstimators.createFromSpecification(
                   //TODO what to write here
   
                   "wayang.java.googlecloudstoragesource.load.prepare", 
javaExecutor.getConfiguration()
           ));
           ExecutionLineageNode mainLineageNode = new 
ExecutionLineageNode(operatorContext);
           mainLineageNode.add(LoadProfileEstimators.createFromSpecification(
                   //TODO what to write here
   
                   "wayang.java.googlecloudstoragesource.load.main", 
javaExecutor.getConfiguration()
           ));
   
   
           outputs[0].getLineage().addPredecessor(mainLineageNode);
   
           return prepareLineageNode.collectAndMark();
       }
   
       @Override
       public Collection<String> getLoadProfileEstimatorConfigurationKeys() {
           return 
Arrays.asList("wayang.java.googlecloudstoragesource.load.prepare", 
"wayang.java.googlecloudstoragesource.load.main");
       }
   
       @Override
       public JavaGoogleCloudStorageSource copy() {
           return new JavaGoogleCloudStorageSource(this.getBucket(), 
this.getBlobName(), this.getfilePathToCredentialsFile());
       }
      
       @Override
       public List<ChannelDescriptor> getSupportedInputChannels(int index) {
           throw new UnsupportedOperationException(String.format("%s does not 
have input channels.", this));
       }
   
       @Override
       public List<ChannelDescriptor> getSupportedOutputChannels(int index) {
           assert index <= this.getNumOutputs() || (index == 0 && 
this.getNumOutputs() == 0);
           return Collections.singletonList(StreamChannel.DESCRIPTOR);
       }
   
       
   }
   
   ```
   
   39fdb3633cae1e43c5b21d4ff3e1606aa0614625


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