public SubsetList CreateSubsets(IEnumerable <SubResult> subResults)
{
SubsetList result = new SubsetList();
if (subResults == null)
{
return(result);
}
foreach (SubResult subResult in subResults)
{
DbSetInfo dbSetInfo = _metadata.DbSets[subResult.dbSetName];
if (result.Any(r => r.dbSetName == subResult.dbSetName))
{
throw new DomainServiceException(string.Format("The included sub results already have DbSet {0} entities", dbSetInfo.dbSetName));
}
RowGenerator rowGenerator = new RowGenerator(dbSetInfo, subResult.Result, _dataHelper);
Subset current = new Subset
{
dbSetName = dbSetInfo.dbSetName,
rows = rowGenerator.CreateDistinctRows(),
names = dbSetInfo.GetNames()
};
result.Add(current);
}
return(result);
}
private void CreateSubset(DbSetInfo dbSetInfo, IEnumerable <object> inputEntities, string propertyName,
string[] nextParts, Dictionary <string, Subset> visited)
{
var metadata = MetadataHelper.GetInitializedMetadata(_domainService);
var isChildProperty = false;
DbSetInfo nextDbSetInfo = null;
var assoc = metadata.associations.Values.Where(
a => a.parentDbSetName == dbSetInfo.dbSetName && a.parentToChildrenName == propertyName)
.FirstOrDefault();
if (assoc != null)
{
isChildProperty = true;
nextDbSetInfo = metadata.dbSets[assoc.childDbSetName];
}
else
{
assoc = metadata.associations.Values.Where(
a => a.childDbSetName == dbSetInfo.dbSetName && a.childToParentName == propertyName)
.FirstOrDefault();
if (assoc == null)
{
throw new DomainServiceException(string.Format(ErrorStrings.ERR_INCL_NAVIG_INVALID,
propertyName + (nextParts.Length > 0 ? "." + string.Join(".", nextParts) : "")));
}
nextDbSetInfo = metadata.dbSets[assoc.parentDbSetName];
}
if (visited.ContainsKey(nextDbSetInfo.dbSetName + "." + propertyName))
{
return;
}
var resultEntities = this.GetResultEntities(inputEntities, propertyName, isChildProperty);
//create temporary result without rows
//fills rows at the end of the method
var current = new Subset
{
dbSetName = nextDbSetInfo.dbSetName,
rows = new Row[0],
names = nextDbSetInfo.GetNames()
};
visited.Add(nextDbSetInfo.dbSetName + "." + propertyName, current);
if (nextParts.Length > 0)
{
CreateSubset(nextDbSetInfo, resultEntities, nextParts[0], nextParts.Skip(1).ToArray(), visited);
}
var rowGenerator = new RowGenerator(nextDbSetInfo, resultEntities, _dataHelper);
current.rows = rowGenerator.CreateDistinctRows();
}
public async Task Invoke(QueryContext <TService> ctx)
{
DbSetInfo dbSetInfo = ctx.Request.GetDbSetInfo() ?? throw new InvalidOperationException($"Could not get the DbSet for {ctx.Request.dbSetName}");
IDataHelper <TService> dataHelper = ctx.ServiceContainer.GetDataHelper();
IServiceOperationsHelper <TService> serviceHelper = ctx.ServiceContainer.GetServiceHelper();
RunTimeMetadata metadata = ctx.Service.GetMetadata();
MethodDescription method = metadata.GetQueryMethod(ctx.Request.dbSetName, ctx.Request.queryName);
LinkedList <object> methParams = new LinkedList <object>();
for (int i = 0; i < method.parameters.Count; ++i)
{
methParams.AddLast(ctx.Request.paramInfo.GetValue(method.parameters[i].name, method, dataHelper));
}
RequestContext req = QueryContext <TService> .CreateRequestContext(ctx.Service, ctx.Request);
using (RequestCallContext callContext = new RequestCallContext(req))
{
MethodInfoData methodData = method.GetMethodData();
object instance = serviceHelper.GetMethodOwner(methodData);
object invokeRes = methodData.MethodInfo.Invoke(instance, methParams.ToArray());
QueryResult queryResult = (QueryResult)await serviceHelper.GetMethodResult(invokeRes);
IEnumerable <object> entities = queryResult.Result;
int? totalCount = queryResult.TotalCount;
RowGenerator rowGenerator = new RowGenerator(dbSetInfo, entities, dataHelper);
IEnumerable <Row> rows = rowGenerator.CreateRows();
SubsetsGenerator subsetsGenerator = new SubsetsGenerator(metadata, dataHelper);
SubsetList subResults = subsetsGenerator.CreateSubsets(queryResult.subResults);
ctx.Response.names = dbSetInfo.GetNames();
ctx.Response.totalCount = totalCount;
ctx.Response.rows = rows;
ctx.Response.subsets = subResults;
ctx.Response.extraInfo = queryResult.extraInfo;
}
await _next(ctx);
}
protected virtual void TrackChangesToEntity(RowInfo rowInfo)
{
DbSetInfo dbSetInfo = rowInfo.GetDbSetInfo();
if (!dbSetInfo.GetIsTrackChanges())
{
return;
}
try
{
string[] changed = new string[0];
switch (rowInfo.changeType)
{
case ChangeType.Updated:
{
changed = rowInfo.GetChangeState().ChangedFieldNames;
}
break;
default:
{
changed = dbSetInfo.GetNames().Select(f => f.n).ToArray();
}
break;
}
string[] pknames = dbSetInfo.GetPKFields().Select(f => f.fieldName).ToArray();
string diffgram = DiffGram.GetDiffGram(rowInfo.GetChangeState().OriginalEntity,
rowInfo.changeType == ChangeType.Deleted ? null : rowInfo.GetChangeState().Entity,
dbSetInfo.GetEntityType(), changed, pknames, rowInfo.changeType, dbSetInfo.dbSetName);
OnTrackChange(dbSetInfo.dbSetName, rowInfo.changeType, diffgram);
}
catch (Exception ex)
{
_OnError(ex);
}
}