content: /**
   * 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.apex.examples.enricher;
  
  import java.util.ArrayList;
  
  import org.apache.apex.malhar.contrib.enrich.JsonFSLoader;
  import org.apache.apex.malhar.contrib.enrich.POJOEnricher;
  import org.apache.apex.malhar.contrib.parser.JsonParser;
  import org.apache.apex.malhar.lib.function.Function;
  import org.apache.apex.malhar.lib.function.FunctionOperator.MapFunctionOperator;
  import org.apache.apex.malhar.lib.function.FunctionOperatorUtil;
  import org.apache.hadoop.conf.Configuration;
  
  import com.google.common.annotations.VisibleForTesting;
  
  import com.datatorrent.api.DAG;
  import com.datatorrent.api.StreamingApplication;
  import com.datatorrent.api.annotation.ApplicationAnnotation;
  
  @ApplicationAnnotation(name = "EnricherAppWithJSONFile")
  /**
   * @since 3.7.0
   */
  public class EnricherAppWithJSONFile implements StreamingApplication
  {
    @VisibleForTesting
    Function.MapFunction<Object, ?> outputFn = FunctionOperatorUtil.CONSOLE_SINK_FN;
    DataGenerator dataGenerator;
  
    @Override
    public void populateDAG(DAG dag, Configuration conf)
    {
      dataGenerator = dag.addOperator("DataGenerator", DataGenerator.class);
      JsonParser parser = dag.addOperator("Parser", JsonParser.class);
  
      /**
       * FSLoader is used to configure Enricher backend. Property of FSLoader file which is fileName is set in
       * properties.xml file.
       * The format that is used to read the file is present as an example in resources/circleMapping.txt file.
       */
      JsonFSLoader fsLoader = new JsonFSLoader();
      POJOEnricher enrich = dag.addOperator("Enrich", POJOEnricher.class);
      enrich.setStore(fsLoader);
  
      ArrayList<String> includeFields = new ArrayList<>();
      includeFields.add("circleName");
      ArrayList<String> lookupFields = new ArrayList<>();
      lookupFields.add("circleId");
  
      enrich.setIncludeFields(includeFields);
      enrich.setLookupFields(lookupFields);
  
      MapFunctionOperator<Object, ?> out = dag.addOperator("out", new MapFunctionOperator<>(outputFn));
      dag.addStream("Parse", dataGenerator.output, parser.in);
      dag.addStream("Enrich", parser.out, enrich.input);
      dag.addStream("Console", enrich.output, out.input);
    }
  
    public DataGenerator getDataGenerator()
    {
      return dataGenerator;
    }
  
    public void setDataGenerator(DataGenerator dataGenerator)
    {
      this.dataGenerator = dataGenerator;
    }
  }
  