Java – spring Mongo > how to get the list aggregationoperations from aggregation

I have a function that takes aggregation as a parameter

I want to get all aggregationoperations from the aggregation Is there any way?

public Aggregation newCustomAggregation(Aggregation aggregation,Criteria c) {
    // How to get list operation aggregation there?
    listOperation.push(Aggregation.match(c));
    return Aggregation
            .newAggregation(listOperations);
}

My goal is to use my custom matchaggregation to create another aggregation

Solution

You can create your own custom aggregation implementation by inheriting aggregation to access protected action fields

It's like

public class CustomAggregation extends Aggregation {
      List<AggregationOperation> getAggregationOperations() {
      return operations;
   }
}

public Aggregation newCustomAggregation(Aggregation aggregation,Criteria c) {
     CustomAggregation customAggregation = (CustomAggregation) aggregation;
     List<AggregationOperation> listOperations = customAggregation.getAggregationOperations();
     listOperations.add(Aggregation.match(c));
     return Aggregation .newAggregation(listOperations);
 }