private Getter FormGetterByRelation(Relation relation, BoundingParameter[] parameters, out ParameterNames parameterNames,out Query query)
{
Getter getter;
if (relation.HasTrivialQuery)
{
getter =
(keys, parPairs) =>
keys.Select(k => new KeyValuePair<Guid, IEnumerable<Guid>>(k, new[] {k})).ToArray();
parameterNames = new ParameterNames(new string[0]);
query = null;
}
else
{
var targetQuery =
relation.SelectTheBestQuery(parameters)
.FirstOrDefault();
if (targetQuery == null)
throw new InvalidOperationException(
string.Format("Нет запроса для построения дерева: род. {0}, доч. {1} ",
relation.ParentElement.Name,
relation.ChildElement.Name));
query = targetQuery;
getter = (keys, parPairs) =>
targetQuery.GetMultipleChildResourceQuery(relation.ParentElement.Name,
parPairs.Keys.ToArray())(keys,parPairs.Values.ToArray());
parameterNames = new ParameterNames(targetQuery.Arguments.Where(k=>!StringComparer.InvariantCultureIgnoreCase.Equals(k,relation.ParentElement.Name)));
}
return getter;
}
private Accumulator<FrameNode, IEnumerable<Guid>> GetAccumulator(Relation relation,Query query)
{
var factory = new AccumulatorFactory();
var plan = new FramingPlan(relation.ParentElement);
var acc = factory.GetOrCreateAccumulator(plan,
(keys, parPairs) =>
query.GetMultipleChildResourceQuery(relation.ParentElement.Name,parPairs.Select(k=>k.Key).ToArray())(keys,parPairs.Select(k=>k.Value).ToArray()),
relation.ParentElement, relation.ChildElement, new ParameterNames());
return acc;
}
private static double CalcQueryRank(Query query, string parentName, BoundingParameter[] parameters)
{
Func<string, string, bool> equals =
(a, b) => string.Equals(a, b, StringComparison.InvariantCultureIgnoreCase);
//отсев запросов, у которых есть параметры, не являющиеся родительским параметром или одним параметром из списка
if (query.Arguments
.Where(k => !equals(k, parentName))
.Any(k => parameters.All(k2 => !equals(k2.Name, k))))
return -1;
double rank = 0.1;
if (query.Arguments.Contains(parentName) && query.ArgCount == 1)
{
rank = 0.5;
}
else if (parameters.Length != 0)
{
var correctiveFloor = parameters.Max(k => k.Depth);
//нужно перевести глубину параметров от текущей точки в рейтинг для текущей точки, т.е. перевернуть их все
rank =
query.Arguments.Where(k => !equals(k, parentName)).Select(
k => correctiveFloor - parameters.Single(k2 => equals(k2.Name, k)).Depth + 1).Sum();
}
if (query.Arguments.Contains(parentName))
{
rank *= 2;
if (query.SerialQueryIsPreferred(parentName))
rank += 1;
}
if (!string.IsNullOrEmpty(query.Namespace))
rank *= 100;
return rank;
}
protected override PlanStep CreateStep(ProjectionElement parent, ProjectionElement child, Plan.ParameterNames pars, Plan.ParameterNames allPars, Utility.Accumulator<FrameNode, IEnumerable<Guid>> provider, int priorGroup, Query func)
{
var step = new TestPlanStep(parent, child, pars, allPars,priorGroup,func);
return step;
}
internal static Query CreateFromQueryWithArgReorder(Query query,int[] order)
{
var newQuery = new Query(
query.QueryInfo,
order.Select(k=>query._types[k]).ToArray(),
query._returnType)
{
_queryMethod =
qr => query._queryMethod(order.Select(k => qr[k]).ToArray()),
_orderedArguments = order.Select(k => query._orderedArguments[k]).ToArray(),
};
return newQuery;
}
public static Query CreateFromMethod(Guid key,string nmspace,object owner,MethodInfo method)
{
Debug.Assert(method !=null);
var query = new Query(
new QueryInfo(key, new ParameterNames(method.GetParameters().Select(k => k.Name)), nmspace,method),
method.GetParameters().Select(k => k.ParameterType).ToArray(),
method.ReturnType)
{
_queryMethod = args=>method.Invoke(owner,args),
_orderedArguments = method.GetParameters().Select(k => k.Name).ToArray()
};
return query;
}
internal static Query CreateFromFactory(Guid key,string resName, string nmspace, ParameterNames parameters,IResourceQuerierFactory querierFactory)
{
var query = new Query(new QueryInfo(key, new ParameterNames(parameters), nmspace,null),
Enumerable.Repeat(typeof(string),parameters.Count()).ToArray(),
typeof(IEnumerable<Guid>))
{
_orderedArguments = parameters.ToArray(),
_queryMethod = k=> querierFactory.CreateQuerier(resName, nmspace,
parameters.ToArray())(k),
};
return query;
}
internal static Query CreateTestStubMultipleQuery(string resource,params string[] pars)
{
var query = new Query(new QueryInfo(Guid.NewGuid(), new ParameterNames(new[]{resource}.Concat(pars)), "",null),
new[]{ typeof(IEnumerable<Guid>)}.Concat(Enumerable.Repeat(typeof(string), pars.Count())).ToArray(),
typeof(MultKeys))
{
_orderedArguments = new[]{resource}.Concat(pars).ToArray(),
_queryMethod = k => new KeyPair(Guid.Empty,new[]{Guid.Empty })
};
return query;
}
internal static Query CreateTestStubQuery(string nmspc = null,Func<object[],object> func = null,params string[] pars)
{
var query = new Query(new QueryInfo(Guid.NewGuid(), new ParameterNames(pars), nmspc,null),
Enumerable.Repeat(typeof(string), pars.Count()).ToArray(),
typeof(IEnumerable<Guid>))
{
_orderedArguments = pars.ToArray(),
_queryMethod = func?? (k => new[] { Guid.Empty }),
};
return query;
}