Examples of org.apache.flink.compiler.PactCompiler$GraphCreatingVisitor

org.apache.flink.compiler.PactCompiler
This utility class performs the translation from the user specified program to the optimizer plan. It works as a visitor that walks the user's job in a depth-first fashion. During the descend, it creates an optimizer node for each operator, respectively data source or -sink. During the ascend, it connects the nodes to the full graph.
This translator relies on the setInputs method in the nodes. As that method implements the size estimation and the awareness for optimizer hints, the sizes will be properly estimated and the translated plan already respects all optimizer hints.

   *            The program's plan.
   * @return JSON dump of the optimized plan.
   * @throws Exception
   */
  public String getOptimizerPlanAsJSON(Plan plan) throws Exception {
    PactCompiler pc = new PactCompiler(new DataStatistics());
    OptimizedPlan op = pc.compile(plan);
    PlanJSONDumpGenerator gen = new PlanJSONDumpGenerator();
  
    return gen.getOptimizerPlanAsJSON(op);
  }

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   */
  public static String optimizerPlanAsJSON(Plan plan) throws Exception {
    LocalExecutor exec = new LocalExecutor();
    try {
      exec.start();
      PactCompiler pc = new PactCompiler(new DataStatistics());
      OptimizedPlan op = pc.compile(plan);
      PlanJSONDumpGenerator gen = new PlanJSONDumpGenerator();


      return gen.getOptimizerPlanAsJSON(op);
    } finally {
      exec.stop();

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    Plan p = getTestJob();
    if (p == null) {
      Assert.fail("Error: Cannot obtain Pact plan. Did the thest forget to override either 'getPactPlan()' or 'getJobGraph()' ?");
    }
    
    PactCompiler pc = new PactCompiler(new DataStatistics());
    OptimizedPlan op = pc.compile(p);
    
    if (printPlan) {
      System.out.println(new PlanJSONDumpGenerator().getOptimizerPlanAsJSON(op)); 
    }

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