org.drools.planner.api.domain.solution.cloner
Interface SolutionCloner<SolutionG extends Solution>

All Known Subinterfaces:

PlanningSolution.NullSolutionCloner

All Known Implementing Classes:

FieldAccessingSolutionCloner, PlanningCloneableSolutionCloner

public interface SolutionCloner<SolutionG extends Solution>

Clones a Solution during planning. Used to remember the state of a good Solution so it can be recalled at a later then when the original Solution is already modified. Also used in population based heuristics to increase or repopulate the population.

Planning cloning is hard: avoid doing it yourself.

Method Summary

SolutionG

cloneSolution(SolutionG original) Does a planning clone.

Method Detail

cloneSolution

SolutionG cloneSolution(SolutionG original)

Does a planning clone. The returned Solution clone must fulfill these requirements:

• The clone must represent the same planning problem. Usually it reuses the same instances of the problem facts and problem fact collections as the original.
• The clone must use different, cloned instances of the entities and entity collections. If a cloned entity changes, the original must remain unchanged. If an entity is added or removed in a cloned Solution, the original Solution must remain unchanged.

Note that a class might support more than 1 clone method: planning clone is just one of them.

Parameters:

original - never null, the original Solution

Returns:

never null, the cloned Solution