FederatedPlanCostEnumerator (Apache SystemDS 3.3.0 API)

java.lang.Object
- org.apache.sysds.hops.fedplanner.FederatedPlanCostEnumerator

```
public class FederatedPlanCostEnumerator
extends Object
```
Enumerates and evaluates all possible federated execution plans for a given Hop DAG. Works with FederatedMemoTable to store plan variants and FederatedPlanCostEstimator to compute their costs.

Constructor Summary

Constructors
Constructor Description

FederatedPlanCostEnumerator()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static FederatedMemoTable.FedPlan`	`enumerateFederatedPlanCost(Hop rootHop, boolean printTree)`	Entry point for federated plan enumeration.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FederatedPlanCostEnumerator
```
public FederatedPlanCostEnumerator()
```
- Method Detail
  - enumerateFederatedPlanCost
```
public static FederatedMemoTable.FedPlan enumerateFederatedPlanCost(Hop rootHop,
                                                                    boolean printTree)
```
    Entry point for federated plan enumeration. This method creates a memo table and returns the minimum cost plan for the entire Directed Acyclic Graph (DAG). It also resolves conflicts where FedPlans have different FederatedOutput types.
    
    Parameters:
    
    rootHop - The root Hop node from which to start the plan enumeration.
    
    printTree - A boolean flag indicating whether to print the federated plan tree.
    
    Returns:
    
    The optimal FedPlan with the minimum cost for the entire DAG.