public BreadthFirstSearch(QueueSearch <S, A> impl)
: base(impl, CollectionFactory.CreateFifoQueue <Node <S, A> >())
{
// Goal test is to be applied to each node when it is generated
// rather than when it is selected for expansion.
impl.setEarlyGoalTest(true);
}
public BreadthFirstSearch(QueueSearch search)
{
// Goal test is to be applied to each node when it is generated
// rather than when it is selected for expansion.
search.SetCheckGoalBeforeAddingToFrontier(true);
this.search = search;
}
public UniformCostSearch(QueueSearch search)
{
this.search = search;
if (search is GraphSearch)
{
((GraphSearch)search).ReplaceFrontierNodeAtStateCostFunction = G;
}
}
public BreadthFirstSearch(QueueSearch search)
{
this._search = search;
}
public AStarSearch(QueueSearch search)
{
this._search = search;
}
// Constructor que recibe el tipo de búsqueda que realizar
// Soporta tamto la versión para grafos como para árboles simplemente pasándole el ejemplar correspondiente de TreeSearch o GraphSearch en el constructor.
public DepthFirstSearch(QueueSearch search)
{
this.search = search;
// Esta búsqueda aplica la prueba de objetivo a cada nodo cuando es seleccionado para expandirse, no antes
}
public AStarSearch(QueueSearch search, HeuristicFunction hf) : base(search, new AStarEvaluationFunction(hf))
{
}
/**
* Creates a search instance.
*
* @param strategy
* search strategy. See static constants.
* @param qSearchImpl
* queue search implementation: e.g. {@link #TREE_SEARCH}, {@link #GRAPH_SEARCH}
*
*/
public ISearchForActions <S, A> createSearch <S, A>(int strategy, int qSearchImpl, IToDoubleFunction <Node <S, A> > h)
{
QueueSearch <S, A> qs = null;
ISearchForActions <S, A> result = null;
switch (qSearchImpl)
{
case TREE_SEARCH:
qs = new TreeSearch <S, A>();
break;
case GRAPH_SEARCH:
qs = new GraphSearch <S, A>();
break;
case GRAPH_SEARCH_RED_FRONTIER:
qs = new GraphSearchReducedFrontier <S, A>();
break;
case GRAPH_SEARCH_BFS:
qs = new GraphSearchBFS <S, A>();
break;
case BIDIRECTIONAL_SEARCH:
qs = new BidirectionalSearch <S, A>();
break;
}
switch (strategy)
{
case DF_SEARCH:
result = new DepthFirstSearch <S, A>(qs);
break;
case BF_SEARCH:
result = new BreadthFirstSearch <S, A>(qs);
break;
case ID_SEARCH:
result = new IterativeDeepeningSearch <S, A>();
break;
case UC_SEARCH:
result = new UniformCostSearch <S, A>(qs);
break;
case GBF_SEARCH:
result = new GreedyBestFirstSearch <S, A>(qs, h);
break;
case ASTAR_SEARCH:
result = new AStarSearch <S, A>(qs, h);
break;
case RBF_SEARCH:
result = new RecursiveBestFirstSearch <S, A>(new AStarSearch <S, A> .EvalFunction(h));
break;
case RBF_AL_SEARCH:
result = new RecursiveBestFirstSearch <S, A>(new AStarSearch <S, A> .EvalFunction(h), true);
break;
case HILL_SEARCH:
result = new HillClimbingSearch <S, A>(h);
break;
}
return(result);
}
/**
* Combines UniformCostSearch queue definition with the specified
* search space exploration strategy.
*/
public UniformCostSearch(QueueSearch <S, A> impl)
: base(impl, CollectionFactory.CreatePriorityQueue <Node <S, A> >(new UniformCostSearchComparer()))
{
}
/**
* Constructs a greedy best-first search from a specified search space
* exploration strategy and a heuristic function.
*
* @param impl
* a search space exploration strategy (e.g. TreeSearch,
* GraphSearch).
* @param h
* a heuristic function <em>h(n)</em>, which estimates the
* cheapest path from the state at node <em>n</em> to a goal
* state.
*/
public GreedyBestFirstSearch(QueueSearch <S, A> impl, IToDoubleFunction <Node <S, A> > h)
: base(impl, new EvalFunction(h))
{
}
public GreedyBestFirstSearch(QueueSearch search, IHeuristicFunction hf) : base(search, new GreedyBestFirstEvaluationFunction(hf))
{
}
protected QueueBasedSearch(QueueSearch <S, A> impl, ICollection <Node <S, A> > queue)
{
this.impl = impl;
this.frontier = queue;
}
/**
* Constructs an A* search from a specified search space exploration
* strategy and a heuristic function.
*
* @param impl a search space exploration strategy (e.g. TreeSearch, GraphSearch).
* @param h a heuristic function <em>h(n)</em>, which estimates the cost
* of the cheapest path from the state at node <em>n</em> to a
* goal state.
*/
public AStarSearch(QueueSearch <S, A> impl, IToDoubleFunction <Node <S, A> > h)
: base(impl, new EvalFunction(h))
{
}
public BestFirstSearch(QueueSearch search, IEvaluationFunction ef)
{
this.search = search;
evaluationFunction = ef;
}
/**
* Constructs a best first search from a specified search problem and
* evaluation function.
*
* @param impl
* a search space exploration strategy.
* @param evalFn
* an evaluation function, which returns a number purporting to
* describe the desirability (or lack thereof) of expanding a
* node.
*/
public BestFirstSearch(QueueSearch <S, A> impl, IToDoubleFunction <Node <S, A> > evalFn)
: base(impl, CollectionFactory.CreatePriorityQueue <Node <S, A> >(new BestFirstSearchComparer(evalFn)))
{
this.evalFn = evalFn;
}
// Constructor que recibe el tipo de búsqueda que realizar
// Soporta tamto la versión para grafos como para árboles simplemente pasándole el ejemplar correspondiente de TreeSearch o GraphSearch en el constructor.
public BreadthFirstSearch(QueueSearch search)
{
this.search = search;
// Esta búsqueda aplica la prueba de objetivo a cada nodo cuando es generado, ANTES DE AÑADIRSE A LA FRONTERA y no cuando es seleccionado para expandirse
this.search.TestGoalBeforeAddToFrontier = true;
}
public DepthFirstSearch(QueueSearch search)
{
this._search = search;
}
public DepthFirstSearch(QueueSearch <S, A> impl)
: base(impl, CollectionFactory.CreateLifoQueue <Node <S, A> >())
{
}
public GreedyBestFirstSearch(QueueSearch search)
{
this._search = search;
}
