// Define other methods and classes here
private static void BuildTreeNode(PrefetchElementStringRepresentation iteratorNode, string[] nodeLeaf, int index)
{
if (index >= nodeLeaf.Length)
{
return; // we're done
}
var nodeStr = nodeLeaf[index];
var nodeStrArr = nodeStr.Split(':');
var name = nodeStrArr[0];
var max = 0;
if (nodeStrArr.Length == 2)
{
int.TryParse(nodeStrArr[1], out max);
}
var n = iteratorNode.Children.FirstOrDefault(c => c.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
if (n == null)
{
n = new PrefetchElementStringRepresentation {
Name = name, MaxNumberOfItemsToReturn = max
};
iteratorNode.Children.Add(n);
}
else if (n.MaxNumberOfItemsToReturn < max)
{
n.MaxNumberOfItemsToReturn = max;
}
BuildTreeNode(n, nodeLeaf, ++index);
}
internal static IPrefetchPath2 ConvertStringToPrefetchPath(EntityType entityType, string prefetchStr, string selectStr)
{
if (string.IsNullOrWhiteSpace(prefetchStr))
{
return(null);
}
// Break up the selectStr into a dictionary of keys and values
// where the key is the path (i.e.: products.supplier)
// and the value is the field name (i.e.: companyname)
var prefetchFieldKeysAndNames = (selectStr ?? "")
.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
.Where(s => s.IndexOf('.') > 0)
.Select(s => s.Trim('.').ToLowerInvariant());
var prefetchFieldNamesDictionary = new Dictionary <string, List <string> >();
foreach (var s in prefetchFieldKeysAndNames)
{
var key = s.Substring(0, s.LastIndexOf('.'));
var value = s.Substring(s.LastIndexOf('.') + 1);
if (prefetchFieldNamesDictionary.ContainsKey(key))
{
prefetchFieldNamesDictionary[key].AddIfNotExists(value);
}
else
{
prefetchFieldNamesDictionary.Add(key, new List <string>(new[] { value }));
}
}
var prefetchStrs = prefetchStr.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
var nodeLeaves =
prefetchStrs.Select(n => n.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries)).ToArray();
var rootNode = new PrefetchElementStringRepresentation {
Name = "root", MaxNumberOfItemsToReturn = 0
};
foreach (var nodeLeaf in nodeLeaves)
{
BuildTreeNode(rootNode, nodeLeaf, 0);
}
var prefetch = new PrefetchPath2(entityType);
foreach (var prefetchRepresentation in rootNode.Children)
{
ExcludeIncludeFieldsList prefetchPathElementIncludeFieldList;
IPrefetchPathElement2 prefetchPathElement =
ConvertPrefetchRepresentationToPrefetchPathElement(entityType, prefetchRepresentation,
prefetchFieldNamesDictionary,
prefetchRepresentation.Name.ToLowerInvariant(),
out prefetchPathElementIncludeFieldList);
if (prefetchPathElement != null)
{
prefetch.Add(prefetchPathElement, prefetchPathElementIncludeFieldList);
}
}
return(prefetch.Count > 0 ? prefetch : null);
}
internal static IPrefetchPath2 ConvertStringToPrefetchPath(EntityType entityType, string prefetchStr, string selectStr)
{
if (string.IsNullOrWhiteSpace(prefetchStr))
return null;
// Break up the selectStr into a dictionary of keys and values
// where the key is the path (i.e.: products.supplier)
// and the value is the field name (i.e.: companyname)
var prefetchFieldKeysAndNames = (selectStr ?? "")
.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries)
.Where(s => s.IndexOf('.') > 0)
.Select(s => s.Trim('.').ToLowerInvariant());
var prefetchFieldNamesDictionary = new Dictionary<string, List<string>>();
foreach (var s in prefetchFieldKeysAndNames)
{
var key = s.Substring(0, s.LastIndexOf('.'));
var value = s.Substring(s.LastIndexOf('.') + 1);
if (prefetchFieldNamesDictionary.ContainsKey(key))
prefetchFieldNamesDictionary[key].AddIfNotExists(value);
else
prefetchFieldNamesDictionary.Add(key, new List<string>(new[] { value }));
}
var prefetchStrs = prefetchStr.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
var nodeLeaves =
prefetchStrs.Select(n => n.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries)).ToArray();
var rootNode = new PrefetchElementStringRepresentation { Name = "root", MaxNumberOfItemsToReturn = 0 };
foreach (var nodeLeaf in nodeLeaves)
BuildTreeNode(rootNode, nodeLeaf, 0);
var prefetch = new PrefetchPath2(entityType);
foreach (var prefetchRepresentation in rootNode.Children)
{
ExcludeIncludeFieldsList prefetchPathElementIncludeFieldList;
IPrefetchPathElement2 prefetchPathElement =
ConvertPrefetchRepresentationToPrefetchPathElement(entityType, prefetchRepresentation,
prefetchFieldNamesDictionary,
prefetchRepresentation.Name.ToLowerInvariant(),
out prefetchPathElementIncludeFieldList);
if (prefetchPathElement != null)
prefetch.Add(prefetchPathElement, prefetchPathElementIncludeFieldList);
}
return prefetch.Count > 0 ? prefetch : null;
}
private static IPrefetchPathElement2 ConvertPrefetchRepresentationToPrefetchPathElement(EntityType parentEntityType,
PrefetchElementStringRepresentation
prefetchRepresentation,
Dictionary
<string, List<string>>
prefetchFieldNamesDictionary,
string fieldNamesKey,
out ExcludeIncludeFieldsList
includeFieldList)
{
includeFieldList = null;
if (prefetchRepresentation == null)
return null;
var includeMap = GetEntityTypeIncludeMap(parentEntityType);
IPrefetchPathElement2 newElement = null;
var rr =
includeMap.FirstOrDefault(
rm => rm.Key.Equals(prefetchRepresentation.Name, StringComparison.InvariantCultureIgnoreCase));
if (!rr.Equals(default(KeyValuePair<string, IPrefetchPathElement2>)))
{
newElement = rr.Value;
foreach (var childRepresentation in prefetchRepresentation.Children)
{
ExcludeIncludeFieldsList subElementIncludeFieldList;
var subElement =
ConvertPrefetchRepresentationToPrefetchPathElement((EntityType)newElement.ToFetchEntityType,
childRepresentation,
prefetchFieldNamesDictionary,
string.Concat(fieldNamesKey, ".",
childRepresentation.Name
.ToLowerInvariant
()),
out subElementIncludeFieldList);
if (subElement != null)
newElement.SubPath.Add(subElement, subElementIncludeFieldList);
}
}
if (newElement != null)
{
// Determin if there is a max amount of records to return for this prefetch element
if (newElement.MaxAmountOfItemsToReturn < prefetchRepresentation.MaxNumberOfItemsToReturn)
newElement.MaxAmountOfItemsToReturn = prefetchRepresentation.MaxNumberOfItemsToReturn;
// Determine if there are field name restrictions applied to the prefetched item
if (prefetchFieldNamesDictionary.ContainsKey(fieldNamesKey))
{
includeFieldList = ConvertEntityTypeFieldNamesToExcludedIncludedFields(
(EntityType)newElement.ToFetchEntityType, prefetchFieldNamesDictionary[fieldNamesKey]);
}
}
return newElement;
}
// Define other methods and classes here
private static void BuildTreeNode(PrefetchElementStringRepresentation iteratorNode, string[] nodeLeaf, int index)
{
if (index >= nodeLeaf.Length)
return; // we're done
var nodeStr = nodeLeaf[index];
var nodeStrArr = nodeStr.Split(':');
var name = nodeStrArr[0];
var max = 0;
if (nodeStrArr.Length == 2) int.TryParse(nodeStrArr[1], out max);
var n = iteratorNode.Children.FirstOrDefault(c => c.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
if (n == null)
{
n = new PrefetchElementStringRepresentation { Name = name, MaxNumberOfItemsToReturn = max };
iteratorNode.Children.Add(n);
}
else if (n.MaxNumberOfItemsToReturn < max)
{
n.MaxNumberOfItemsToReturn = max;
}
BuildTreeNode(n, nodeLeaf, ++index);
}
private static IPrefetchPathElement2 ConvertPrefetchRepresentationToPrefetchPathElement(EntityType parentEntityType,
PrefetchElementStringRepresentation
prefetchRepresentation,
Dictionary
<string, List <string> >
prefetchFieldNamesDictionary,
string fieldNamesKey,
out ExcludeIncludeFieldsList
includeFieldList)
{
includeFieldList = null;
if (prefetchRepresentation == null)
{
return(null);
}
var includeMap = GetEntityTypeIncludeMap(parentEntityType);
IPrefetchPathElement2 newElement = null;
var rr =
includeMap.FirstOrDefault(
rm => rm.Key.Equals(prefetchRepresentation.Name, StringComparison.InvariantCultureIgnoreCase));
if (!rr.Equals(default(KeyValuePair <string, IPrefetchPathElement2>)))
{
newElement = rr.Value;
foreach (var childRepresentation in prefetchRepresentation.Children)
{
ExcludeIncludeFieldsList subElementIncludeFieldList;
var subElement =
ConvertPrefetchRepresentationToPrefetchPathElement((EntityType)newElement.ToFetchEntityType,
childRepresentation,
prefetchFieldNamesDictionary,
string.Concat(fieldNamesKey, ".",
childRepresentation.Name
.ToLowerInvariant
()),
out subElementIncludeFieldList);
if (subElement != null)
{
newElement.SubPath.Add(subElement, subElementIncludeFieldList);
}
}
}
if (newElement != null)
{
// Determin if there is a max amount of records to return for this prefetch element
if (newElement.MaxAmountOfItemsToReturn < prefetchRepresentation.MaxNumberOfItemsToReturn)
{
newElement.MaxAmountOfItemsToReturn = prefetchRepresentation.MaxNumberOfItemsToReturn;
}
// Determine if there are field name restrictions applied to the prefetched item
if (prefetchFieldNamesDictionary.ContainsKey(fieldNamesKey))
{
includeFieldList = ConvertEntityTypeFieldNamesToExcludedIncludedFields(
(EntityType)newElement.ToFetchEntityType, prefetchFieldNamesDictionary[fieldNamesKey]);
}
}
return(newElement);
}
