package org.kuali.rice.krms.api;

 import java.util.Map;

 import java.util.Set;

 public interface AssetResolver <T> {

         /**

          * @return the set of assets that this resolver requires to resolve its output, or an empty set if it has no prereqs;

          */

         Set<Asset> getPrerequisites();

         /**

          * @return the asset that the implementor resolves

          */

         Asset getOutput();

         /**

          * @return an integer representing the cost of resolving the asset. 1 is cheap, Integer.MAX_INT is expensive.

          */

         int getCost();

         /**

          * @resolvedPrereqs the resolved prereqs

          * @return the resolved asset

          * @throws AssetResolutionException if something bad happens during the asset resolution process

          */

         T resolve(Map<Asset, Object> resolvedPrereqs) throws AssetResolutionException;

 }