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;
}
public void QuerySelectionWithParamsAndNot2()
{
var parent = new ProjectionElement { Name = "parent" };
var child = new ProjectionElement { Name = "child" };
var query1 = Query.CreateTestStubQuery("", null, "parent");
var query2 = Query.CreateTestStubMultipleQuery(parent.Name);
var relation = new Relation
{
ParentElement = parent,
ChildElement = child,
Queries = new[]
{
query1, query2
}
};
var bestQuery = relation.SelectTheBestQuery(new[] { new BoundingParameter("name", 1) }).First();
Assert.AreSame(query2, bestQuery);
}
public void QuerySelectionForParentWithNoQuery()
{
var parent = new ProjectionElement { Name = "parent" };
var child = new ProjectionElement { Name = "child" };
var query1 = Query.CreateTestStubQuery("", null);
var relation = new Relation
{
ParentElement = parent,
ChildElement = child,
Queries = new[]
{
query1
}
};
var bestQuery = relation.SelectTheBestQuery(new BoundingParameter[0]).First();
Assert.AreSame(query1, bestQuery);
}
public void QuerySelectionWithParamsAtDifferentDepths()
{
var parent = new ProjectionElement { Name = "parent" };
var child = new ProjectionElement { Name = "child" };
var query1 = Query.CreateTestStubQuery("", null, "parent","closer");
var query2 = Query.CreateTestStubQuery("", null, "parent","further");
var relation = new Relation
{
ParentElement = parent,
ChildElement = child,
Queries = new[]
{
query1, query2
}
};
var bestQuery = relation.SelectTheBestQuery(new[] { new BoundingParameter("closer", 1), new BoundingParameter("further", 2) }).First();
Assert.AreSame(query1, bestQuery);
}
