public bool StartsWith(EdgeList myLevel, Boolean IncludingAttrs)
{
if (!IncludingAttrs)
{
return(StartsWith(myLevel));
}
if (myLevel.Level > Level)
{
throw new ArgumentException(myLevel + " is greater than " + Level);
}
for (Int32 i = 0; i < myLevel.Level; i++)
{
if (myLevel.Edges[i].VertexTypeID != Edges[i].VertexTypeID || myLevel.Edges[i].AttributeID != Edges[i].AttributeID)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Checks whether this element is a reference AND has some following selections
/// </summary>
/// <returns></returns>
public Boolean IsReferenceToSkip(EdgeList myEdgeList)
{
if (Element != null && !(this is SelectionElementFunction))
{
if (Element.Kind == AttributeType.IncomingEdge || Element.Kind == AttributeType.OutgoingEdge)
{
if (RelatedIDChainDefinition.Edges.Count > myEdgeList.Edges.Count) // if the IDNode is only one level above we can't skip this selection elemen because it is the last one: U.Friends
{
return(true);
}
else if (RelatedIDChainDefinition.Edges.Count == myEdgeList.Edges.Count && RelatedIDChainDefinition.IsUndefinedAttribute)
{
return(true);
}
else
{
return(false);
}
}
}
return(false);
}
public Boolean Equals(EdgeList p)
{
// If parameter is null return false:
if ((object)p == null)
{
return(false);
}
if (this.Level != p.Level)
{
return(false);
}
for (int i = 0; i < Edges.Count; i++)
{
if (this.Edges[i] != p.Edges[i])
{
return(false);
}
}
return(true);
}
/// <summary>
/// This is the main function. It will check all selections on this type and will create the readouts
/// </summary>
private IEnumerable<IVertexView> ExamineVertex(long myResolutionDepth,
String myReference,
IVertexType myRelatedVertexType,
EdgeList myLevelKey,
bool myUsingGraph,
SecurityToken mySecurityToken,
Int64 myTransactionToken)
{
#region Get all selections and aggregates for this reference, type and level
var _Selections = getAttributeSelections(myReference, myLevelKey);
var aggregates = getAttributeAggregates(myReference, myLevelKey);
#endregion
#region Otherwise load all dbos until this level and return them
#region Get dbos enumerable of the first level - either from ExpressionGraph or via index
IEnumerable<IVertex> dbos;
if (myUsingGraph)
{
dbos = _ExpressionGraph.Select(new LevelKey(myLevelKey.Edges,
_graphdb,
mySecurityToken,
myTransactionToken), null, true);
}
else // using GUID index
{
dbos = _graphdb.GetVertices<IEnumerable<IVertex>>(
mySecurityToken,
myTransactionToken,
new RequestGetVertices(myRelatedVertexType.ID),
(stats, vertices) => vertices);
}
#endregion
if (aggregates.IsNotNullOrEmpty())
{
foreach (var val in ExamineDBO_Aggregates(myTransactionToken,
mySecurityToken,
dbos,
aggregates,
_Selections,
myUsingGraph,
myResolutionDepth))
{
if (val != null)
{
yield return val;
}
}
}
else if (_Groupings.IsNotNullOrEmpty())
{
foreach (var val in ExamineDBO_Groupings(dbos, _Selections))
{
if (val != null)
{
yield return val;
}
}
}
else if (!_Selections.IsNullOrEmpty())
{
#region Usually attribute selections
var vertexType = _graphdb.GetVertexType<IVertexType>(
mySecurityToken,
myTransactionToken,
new RequestGetVertexType(myLevelKey.LastEdge.VertexTypeID),
(stats, type) => type);
foreach (var aDBObject in dbos)
{
#region Create a readoutObject for this DBO and yield it: on failure throw an exception
Tuple<IDictionary<String, Object>, IDictionary<String, IEdgeView>> Attributes =
GetAllSelectedAttributesFromVertex(mySecurityToken,
myTransactionToken,
aDBObject,
vertexType,
myResolutionDepth,
myLevelKey,
myReference,
myUsingGraph);
if (Attributes != null && (Attributes.Item1.Count > 0 || Attributes.Item2.Count > 0))
{
yield return new VertexView(Attributes.Item1, Attributes.Item2);
}
#endregion
}
#endregion
}
#endregion
}
/// <summary>
/// Adds the typeNode as an asterisk *, rhomb # or minus - or ad
/// </summary>
public void AddSelectionType(string myReference, IVertexType myType, TypesOfSelect mySelType, long? myTypeID = null)
{
var selElem = new SelectionElement(mySelType, myTypeID);
if (!_Selections.ContainsKey(myReference))
_Selections.Add(myReference, new Dictionary<EdgeList, List<SelectionElement>>());
var level = new EdgeList(new EdgeKey(myType.ID));
if (!_Selections[myReference].ContainsKey(level))
_Selections[myReference].Add(level, new List<SelectionElement>());
if (!_Selections[myReference][level].Exists(item => item.Selection == mySelType))
{
_Selections[myReference][level].Add(selElem);
}
}
/// <summary>
/// This will return the result of all examined DBOs, including calculated aggregates and groupings.
/// The Value of the returned GraphResult is of type IEnumerable<Vertex>
/// </summary>
//public IEnumerable<IVertexView> GetResult(IEnumerable<IVertexView> myVertices)
//{
// foreach (var _Vertex in myVertices)
// {
// yield return _Vertex;
// }
//}
#endregion
/// <summary>
/// Examine a TypeNode to a specific <paramref name="myResolutionDepth"/> by using the underlying graph or the type guid index
/// </summary>
/// <param name="myResolutionDepth">The depth to which the reference attributes should be resolved</param>
/// <param name="myTypeNode">The type node which should be examined on selections</param>
/// <param name="myUsingGraph">True if there is a valid where expression of this typeNode</param>
/// <returns>True if succeeded, false if there was nothing to select for this type</returns>
public Boolean Examine(Int64 myResolutionDepth,
String myReference,
IVertexType myReferencedDBType,
Boolean myUsingGraph,
ref IEnumerable<IVertexView> myVertices,
SecurityToken mySecurityToken,
Int64 myTransactionToken)
{
if ((!_Selections.ContainsKey(myReference) || !_Selections[myReference].ContainsKey(new EdgeList(myReferencedDBType.ID))) && _Aggregates.IsNullOrEmpty())
{
return false;
}
var levelKey = new EdgeList(myReferencedDBType.ID);
//var levelKeys = new EdgeList(myReferencedDBType.GetAncestorVertexTypesAndSelf().Select(x => new EdgeKey(x.ID)));
myVertices = ExamineVertex(myResolutionDepth, myReference, myReferencedDBType, levelKey, myUsingGraph, mySecurityToken, myTransactionToken);
return true;
}
/// <summary>
/// This will load the vertex (check for load errors) and get all selected attributes of this vertex
/// </summary>
private VertexView LoadAndResolveVertex(SecurityToken mySecurityToken,
Int64 myTransactionToken,
IVertex myObjectUUID,
IVertexType myTypeOfAttribute,
Int64 myDepth,
EdgeList myLevelKey,
String myReference,
Boolean myUsingGraph)
{
var tuple = GetAllSelectedAttributesFromVertex(mySecurityToken,
myTransactionToken,
myObjectUUID,
myTypeOfAttribute,
myDepth,
myLevelKey,
myReference,
myUsingGraph);
return new VertexView(tuple.Item1, tuple.Item2);
}
/// <summary>
/// Get all aggregates on this <paramref name="myReference"/>, <paramref name="myType"/> and <paramref name="myLevelKey"/>
/// </summary>
/// <param name="myReference"></param>
/// <param name="myType"></param>
/// <param name="myLevelKey"></param>
/// <returns></returns>
private List<SelectionElementAggregate> getAttributeAggregates(String myReference, EdgeList myLevelKey)
{
if (_Aggregates.ContainsKey(myReference) && (_Aggregates[myReference].ContainsKey(myLevelKey)))
{
return _Aggregates[myReference][myLevelKey];
}
else
{
return null;
}
}
/// <summary>
/// Checks whether this element is a reference AND has some following selections
/// </summary>
/// <returns></returns>
public Boolean IsReferenceToSkip(EdgeList myEdgeList)
{
if (Element != null && !(this is SelectionElementFunction))
{
if (Element.Kind == AttributeType.IncomingEdge || Element.Kind == AttributeType.OutgoingEdge)
{
if (RelatedIDChainDefinition.Edges.Count > myEdgeList.Edges.Count) // if the IDNode is only one level above we can't skip this selection elemen because it is the last one: U.Friends
{
return true;
}
else if (RelatedIDChainDefinition.Edges.Count == myEdgeList.Edges.Count && RelatedIDChainDefinition.IsUndefinedAttribute)
{
return true;
}
else
{
return false;
}
}
}
return false;
}
/// <summary>
/// Initializes a new instance of the InvalidEdgeListOperationException using an edge list.
/// </summary>
/// <param name="myEdgeList1"></param>
/// <param name="myEdgeList2"></param>
/// <param name="myOperation"></param>
/// <param name="innerException">The exception that is the cause of the current exception, this parameter can be NULL.</param>
public InvalidEdgeListOperationException(EdgeList myEdgeList1, EdgeList myEdgeList2, string myOperation, Exception innerException = null) : base(innerException)
{
_EdgeList1 = myEdgeList1;
_EdgeList2 = myEdgeList2;
this._Operation = myOperation;
}
/// <summary>
/// Resolves an attribute
/// </summary>
private IEdgeView ResolveAttributeValue(IOutgoingEdgeDefinition attrDefinition,
IEdge myEdge,
Int64 myDepth,
EdgeList myEdgeList,
IVertex mySourceDBObject,
String reference,
Boolean myUsingGraph,
SecurityToken mySecurityToken,
Int64 myTransactionToken)
{
#region Get levelKey and UsingGraph
if (myEdgeList.Level == 0)
{
myEdgeList = new EdgeList(new EdgeKey(attrDefinition.RelatedType.ID,
attrDefinition.ID));
}
else
{
myEdgeList += new EdgeKey(attrDefinition.RelatedType.ID,
attrDefinition.ID);
}
// at some deeper level we could get into graph independend results.
//From this time, we can use the GUID index rather than asking the graph all the time
if (myUsingGraph)
{
myUsingGraph = _ExpressionGraph.IsGraphRelevant(new LevelKey(myEdgeList.Edges,
_graphdb,
mySecurityToken,
myTransactionToken),
mySourceDBObject);
}
#endregion
if (attrDefinition.Multiplicity != EdgeMultiplicity.SingleEdge)
{
#region SetReference attribute -> return new Edge
IEnumerable<SingleEdgeView> resultList = null;
if (myUsingGraph)
{
var dbos = _ExpressionGraph.Select(new LevelKey(myEdgeList.Edges,
_graphdb,
mySecurityToken,
myTransactionToken),
mySourceDBObject,
true).ToList();
//Todo: find a better way to get the edge properties
resultList = GenerateSingleEdgeViews(mySecurityToken,
myTransactionToken,
((IHyperEdge)myEdge)
.GetAllEdges((aSingleEdge) =>
dbos.Contains(aSingleEdge.GetTargetVertex())),
attrDefinition.TargetVertexType,
myDepth,
myEdgeList,
reference,
myUsingGraph,
attrDefinition.InnerEdgeType);
}
else
{
resultList = GenerateSingleEdgeViews(mySecurityToken, myTransactionToken,
((IHyperEdge)myEdge).GetAllEdges(),
attrDefinition.TargetVertexType,
myDepth,
myEdgeList,
reference,
myUsingGraph,
attrDefinition.InnerEdgeType);
}
return new HyperEdgeView(null, resultList);
#endregion
}
else
{
#region Single reference
return GenerateSingleEdgeViews(mySecurityToken, myTransactionToken,
new List<ISingleEdge> { (ISingleEdge)myEdge },
attrDefinition.TargetVertexType,
myDepth,
myEdgeList,
reference,
myUsingGraph,
attrDefinition.InnerEdgeType).FirstOrDefault();
#endregion
}
}
public override int GetHashCode()
{
return(Alias.GetHashCode() ^ EdgeList.GetHashCode() ^ Element.GetHashCode() ^ Selection.GetHashCode() ^ IsGroupedOrAggregated.GetHashCode() ^ LevelKey.GetHashCode() ^ Function.FuncName.GetHashCode());
}
/// <summary>
/// This will add all attributes of <paramref name="myDBObject"/> to the
/// <paramref name="myAttributes"/> reference. Reference attributes will be resolved to the <paramref name="myDepth"/>
/// </summary>
private void AddAttributesByDBO(
SecurityToken mySecurityToken,
Int64 myTransactionToken,
ref Tuple<IDictionary<String, Object>, IDictionary<String, IEdgeView>> myAttributes,
IVertexType myType,
IVertex myDBObject,
Int64 myDepth,
EdgeList myEdgeList,
String myReference,
Boolean myUsingGraph,
TypesOfSelect mySelType,
Int64? myTypeID = null)
{
#region Get all attributes which are stored at the DBO
#region properties
foreach (var aProperty in myType.GetPropertyDefinitions(true))
{
var tempResult = aProperty.GetValue(myDBObject);
if (tempResult != null)
{
myAttributes.Item1.Add(aProperty.Name, tempResult);
}
}
#endregion
#region unstructured data
foreach (var aUnstructuredProperty in myDBObject.GetAllUnstructuredProperties())
{
myAttributes.Item1.Add(aUnstructuredProperty.PropertyName, aUnstructuredProperty.Property);
}
#endregion
#region outgoing edges
foreach (var outgoingEdgeDefinition in myType.GetOutgoingEdgeDefinitions(true))
{
if (myDBObject.HasOutgoingEdge(outgoingEdgeDefinition.ID))
{
// Since we can define special depth (via setting) for attributes we need to check them now
myDepth = GetDepth(-1, myDepth, myType, outgoingEdgeDefinition);
if ((myDepth > 0))
{
myAttributes.Item2.Add(
outgoingEdgeDefinition.Name,
ResolveAttributeValue(
outgoingEdgeDefinition,
myDBObject.GetOutgoingEdge(outgoingEdgeDefinition.ID),
myDepth,
myEdgeList,
myDBObject,
myReference,
myUsingGraph,
mySecurityToken,
myTransactionToken));
}
else
{
myAttributes.Item2.Add(outgoingEdgeDefinition.Name,
GetNotResolvedReferenceEdgeAttributeValue(myDBObject
.GetOutgoingEdge(outgoingEdgeDefinition.ID)
.GetTargetVertices()));
}
}
}
#endregion
#region incoming
foreach (var aIncomingEdgeDefinition in myType.GetIncomingEdgeDefinitions(true))
{
if (myDBObject.HasIncomingVertices(aIncomingEdgeDefinition
.RelatedEdgeDefinition
.RelatedType.ID,
aIncomingEdgeDefinition
.RelatedEdgeDefinition.ID))
{
if (myDepth > 0)
{
myAttributes.Item2.Add(
aIncomingEdgeDefinition.Name,
ResolveIncomingEdgeValue(
aIncomingEdgeDefinition,
myDBObject.GetIncomingVertices(aIncomingEdgeDefinition
.RelatedEdgeDefinition
.RelatedType
.ID,
aIncomingEdgeDefinition
.RelatedEdgeDefinition.ID),
myDepth,
myEdgeList,
myDBObject,
myReference,
myUsingGraph,
mySecurityToken,
myTransactionToken));
}
else
{
myAttributes.Item2.Add(aIncomingEdgeDefinition.Name,
GetNotResolvedReferenceEdgeAttributeValue(myDBObject.GetIncomingVertices(aIncomingEdgeDefinition
.RelatedEdgeDefinition
.RelatedType.ID,
aIncomingEdgeDefinition
.RelatedEdgeDefinition.ID)));
}
}
}
#endregion
#endregion
}
/// <summary>
/// Resolve a AListReferenceEdgeType to a DBObjectReadouts.
/// This will resolve each edge target using the 'GetAllAttributesFromDBO' method
/// </summary>
private IEnumerable<IVertexView> GetVertices(SecurityToken mySecurityToken,
Int64 myTransactionToken,
IVertexType myTypeOfAttribute,
IEnumerable<IVertex> myObjectUUIDs,
Int64 myDepth,
EdgeList myLevelKey,
String myReference,
Boolean myUsingGraph)
{
//TODO:obey weighted edges here
foreach (var aVertex in myObjectUUIDs)
{
yield return LoadAndResolveVertex(mySecurityToken,
myTransactionToken,
aVertex,
myTypeOfAttribute,
myDepth,
myLevelKey,
myReference,
myUsingGraph);
}
yield break;
}
/// <summary>
/// Executes the function and return the result - for concatenated functions this will be done recursively
/// </summary>
private FuncParameter ExecuteFunction(SelectionElementFunction mySelectionElementFunction,
IVertex myDBObject,
object myCallingObject,
Int64 myDepth,
String myReference,
IVertexType myReferencedDBType,
EdgeList myLevelKey,
Boolean myUsingGraph,
SecurityToken mySecurityToken,
Int64 myTransactionToken)
{
#region Function
if (myCallingObject == null) // DBObject does not have the attribute
{
if (mySelectionElementFunction.SelectValueAssignment != null)
{
return new FuncParameter((mySelectionElementFunction.SelectValueAssignment.TermDefinition as ValueDefinition).Value);
}
return null;
}
#region Get the FunctionNode and validate the Element
var func = mySelectionElementFunction.Function;
if (mySelectionElementFunction.Element == null)
{
return null;
}
#endregion
#region Execute the function
var parameters = func.Execute(myReferencedDBType, myDBObject, myReference, _pluginManager, _graphdb, mySecurityToken, myTransactionToken);
var result = func.Function.ExecFunc(mySelectionElementFunction.Element, myCallingObject, myDBObject, _graphdb, mySecurityToken, myTransactionToken, parameters.ToArray());
if (result.Value == null)
{
return null; // no result for this object because of not set attribute value
}
if (mySelectionElementFunction.FollowingFunction != null)
{
return ExecuteFunction(mySelectionElementFunction.FollowingFunction, myDBObject, result.Value, myDepth, myReference, myReferencedDBType, myLevelKey, myUsingGraph, mySecurityToken, myTransactionToken);
}
else
{
return result;
}
#endregion
#endregion
}
/// <summary> Gets an attribute value - references will be resolved. </summary>
///
/// <remarks> Stefan, 16.04.2010. </remarks>
///
/// <param name="myType"> Type. </param>
/// <param name="myTypeAttribute"> my type attribute. </param>
/// <param name="myDBObject"> my database object. </param>
/// <param name="myDepth"> Depth of my. </param>
/// <param name="myLevelKey"> my level key. </param>
/// <param name="reference"> The reference. </param>
/// <param name="myUsingGraph"> true to my using graph. </param>
/// <param name="attributeValue"> [out] The attribute value. </param>
///
/// <returns> true if it succeeds, false if the DBO does not have the attribute. </returns>
private Boolean GetAttributeValueAndResolve(SecurityToken mySecurityToken,
Int64 myTransactionToken,
IVertexType myType,
SelectionElement mySelectionelement,
IVertex myDBObject,
Int64 myDepth,
EdgeList myLevelKey,
String reference,
Boolean myUsingGraph,
out Object attributeValue,
String myUndefAttrName = null)
{
var typeAttribute = mySelectionelement.Element;
switch (typeAttribute.Kind)
{
case AttributeType.Property:
#region property
var property = (IPropertyDefinition)typeAttribute;
attributeValue = property.GetValue(myDBObject);
return attributeValue != null;
#endregion
case AttributeType.IncomingEdge:
#region IsBackwardEdge
var incomingEdgeAttribute = (IIncomingEdgeDefinition)typeAttribute;
if (myDBObject.HasIncomingVertices(incomingEdgeAttribute.RelatedEdgeDefinition.RelatedType.ID, incomingEdgeAttribute.RelatedEdgeDefinition.ID))
{
var dbos = myDBObject.GetIncomingVertices(incomingEdgeAttribute.RelatedEdgeDefinition.RelatedType.ID, incomingEdgeAttribute.RelatedEdgeDefinition.ID);
if (dbos != null)
{
if (myDepth > 0)
{
attributeValue = ResolveIncomingEdgeValue(incomingEdgeAttribute,
dbos,
myDepth,
myLevelKey,
myDBObject,
reference,
myUsingGraph,
mySecurityToken,
myTransactionToken);
}
else
{
attributeValue = GetNotResolvedReferenceEdgeAttributeValue(dbos);
}
return true;
}
}
#endregion
break;
case AttributeType.OutgoingEdge:
#region outgoing edges
if (myDBObject.HasOutgoingEdge(typeAttribute.ID))
{
var edge = myDBObject.GetOutgoingEdge(typeAttribute.ID);
if (edge != null)
{
if (myDepth > 0)
{
attributeValue = ResolveAttributeValue(
(IOutgoingEdgeDefinition)typeAttribute,
edge,
myDepth,
myLevelKey,
myDBObject,
reference,
myUsingGraph,
mySecurityToken,
myTransactionToken);
}
else
{
attributeValue = GetNotResolvedReferenceEdgeAttributeValue(edge.GetTargetVertices());
}
return true;
}
}
#endregion
break;
case AttributeType.BinaryProperty:
default:
break;
}
attributeValue = null;
return false;
}
/// <summary>
/// Single IDNode selection attribute
/// </summary>
public void AddElementToSelection(string myAlias,
String myReference,
IDChainDefinition myIDChainDefinition,
Boolean myIsGroupedOrAggregated,
SelectValueAssignment mySelectValueAssignment = null)
{
SelectionElement lastElem = null;
var curLevel = new EdgeList();
EdgeList preLevel = null;
if (myReference != null && _Selections.ContainsKey(myReference) &&
_Selections[myReference].Any(kv => kv.Value.Any(se => se.RelatedIDChainDefinition == myIDChainDefinition &&
se.Alias == myAlias)))
{
throw new DuplicateAttributeSelectionException(myAlias);
}
foreach (var nodeEdgeKey in myIDChainDefinition)
{
if (nodeEdgeKey is ChainPartTypeOrAttributeDefinition)
{
#region Usual attribute
preLevel = null;
var selElem = new SelectionElement(myAlias, curLevel, myIsGroupedOrAggregated, myIDChainDefinition);
var typeOrAttr = (nodeEdgeKey as ChainPartTypeOrAttributeDefinition);
if (true || typeOrAttr.DBType != null && typeOrAttr.TypeAttribute != null)
{
#region defined
var edgeKey = typeOrAttr.EdgeKey;
selElem.Element = typeOrAttr.TypeAttribute; //_DBContext.DBTypeManager.GetTypeAttributeByEdge(edgeKey);
if (String.IsNullOrEmpty(selElem.Alias) || (nodeEdgeKey.Next != null && !(nodeEdgeKey.Next is ChainPartFuncDefinition)))
{
selElem.Alias = typeOrAttr.TypeAttribute.Name;//_DBContext.DBTypeManager.GetTypeAttributeByEdge(edgeKey).Name;
}
curLevel += edgeKey;
preLevel = curLevel.GetPredecessorLevel();
#endregion
}
else
{
#region undefined attribute
if (myIDChainDefinition.Level == 0)
{
preLevel = new EdgeList(myIDChainDefinition.LastType.ID);
}
else
{
var element = _Selections[myReference].Last();
preLevel = curLevel.GetPredecessorLevel();
//preLevel = curLevel;
}
selElem.Alias = typeOrAttr.TypeOrAttributeName;
selElem.Element = new UnstructuredProperty(typeOrAttr.TypeOrAttributeName);
#endregion
}
#region Add to _Selections if valid
if (!_Selections.ContainsKey(myReference))
{
_Selections.Add(myReference, new Dictionary<EdgeList, List<SelectionElement>>());
}
if (!_Selections[myReference].ContainsKey(preLevel))
{
_Selections[myReference].Add(preLevel, new List<SelectionElement>());
}
///
/// Duplicate AttributeSelection is: "U.Name, U.Name" or "U.Name.TOUPPER(), U.Name" but not "U.Friends.TOP(1).Name, U.Friends.TOP(1).Age"
if ((nodeEdgeKey.Next == null || (nodeEdgeKey.Next is ChainPartFuncDefinition && nodeEdgeKey.Next.Next == null))
// U.Name, U.Name U.Name.TOUPPER, U.Name
&& _Selections[myReference][preLevel].Exists(item => item.Alias == selElem.Alias &&
selElem.EdgeList.Level == item.EdgeList.Level &&
item.RelatedIDChainDefinition.Depth == selElem.RelatedIDChainDefinition.Depth &&
item.Element != null) && !myIsGroupedOrAggregated)
{
throw new DuplicateAttributeSelectionException(selElem.Alias);
}
// Do not add again if:
// - it is a defined attribute and there is an asterisk selection at this level
// - it is not the last part AND
// - there is already an item of this part with the same alias and the same Depth
if (nodeEdgeKey.Next == null ||
_Selections[myReference][preLevel].Count == 0 ||
_Selections[myReference][preLevel].Any(item => IsNewSelectionElement(item, selElem)))
{
_Selections[myReference][preLevel].Add(selElem);
}
#endregion
lastElem = selElem;
#endregion
}
else if (nodeEdgeKey is ChainPartFuncDefinition)
{
var chainPartFuncDefinition = (nodeEdgeKey as ChainPartFuncDefinition);
#region Function
if (myReference == null)
{
#region Type independent functions
var selElem = new SelectionElement(myAlias, myIDChainDefinition);
if (String.IsNullOrEmpty(selElem.Alias))
{
selElem.Alias = chainPartFuncDefinition.SourceParsedString;
}
var funcElem = new SelectionElementFunction(selElem, chainPartFuncDefinition, chainPartFuncDefinition.Parameters);
if (lastElem is SelectionElementFunction)
{
(lastElem as SelectionElementFunction).AddFollowingFunction(funcElem);
lastElem = funcElem;
}
else
{
if (_SelectionElementsTypeIndependend.Any(se => se.Alias == funcElem.Alias))
{
throw new DuplicateAttributeSelectionException(funcElem.Alias);
}
_SelectionElementsTypeIndependend.Add(funcElem);
lastElem = funcElem;
}
#endregion
}
else
{
#region Type dependent function
var funcElem = new SelectionElementFunction(lastElem, (nodeEdgeKey as ChainPartFuncDefinition), (nodeEdgeKey as ChainPartFuncDefinition).Parameters);
funcElem.RelatedIDChainDefinition = myIDChainDefinition;
if (!String.IsNullOrEmpty(myAlias) && nodeEdgeKey.Next == null)
{
funcElem.Alias = myAlias;
}
if (lastElem is SelectionElementFunction)
{
(lastElem as SelectionElementFunction).AddFollowingFunction(funcElem);
}
else if (_Selections[myReference][preLevel].Contains(lastElem))
{
#region Add function to the last selection element (replace it)
_Selections[myReference][preLevel].Remove(lastElem);
//lastElem = new SelectionElementFunction(lastElem, (nodeEdgeKey as ChainPartFuncDefinition), (nodeEdgeKey as ChainPartFuncDefinition).Parameters);
//lastElem.RelatedIDChainDefinition = myIDChainDefinition;
//if (!String.IsNullOrEmpty(alias) && nodeEdgeKey.Next == null)
//{
// lastElem.Alias = alias;
//}
if (!_Selections[myReference][preLevel].Contains(funcElem)) // In case this Element with func is already in the selection list do nothing.
{
_Selections[myReference][preLevel].Add(funcElem);
}
#endregion
} //functions are not equal && it is the end of a function sequence
else if (!_Selections[myReference][preLevel].Contains(funcElem) && !(nodeEdgeKey.Next is ChainPartFuncDefinition))
{
#region In this case we have a similar function but NOT THE SAME. Since we don't know what to do, return error.
throw new InvalidVertexAttributeSelectionException(myIDChainDefinition.ContentString);
#endregion
}
//always assign funcElem to lastElem, otherwise the part of add following functions doesn't work
lastElem = funcElem;
#endregion
}
#endregion
}
}
#region Set the SelectValueAssignment for the last element
if (lastElem != null && mySelectValueAssignment != null)
{
#region Error handling
System.Diagnostics.Debug.Assert(lastElem.Element != null);
if (lastElem.Element.Kind != AttributeType.Property && lastElem.Element.Kind != AttributeType.BinaryProperty)
{
throw new InvalidSelectValueAssignmentException(lastElem.Element.Name);
}
if (!(mySelectValueAssignment.TermDefinition is ValueDefinition))
{
throw new NotImplementedQLException("");
}
#endregion
#region Validate datatype if the attribute is a defined attribute
//if (!(lastElem.Element is UnstructuredProperty))
//{
// if (!lastElem.Element.GetADBBaseObjectType(_DBContext.DBTypeManager).IsValidValue((mySelectValueAssignment.TermDefinition as ValueDefinition).Value.Value))
// {
// return new Exceptional(new Error_SelectValueAssignmentDataTypeDoesNotMatch(lastElem.Element.GetADBBaseObjectType(_DBContext.DBTypeManager).ObjectName, (mySelectValueAssignment.TermDefinition as ValueDefinition).Value.ObjectName));
// }
// var typedValue = new ValueDefinition(lastElem.Element.GetADBBaseObjectType(_DBContext.DBTypeManager).Clone((mySelectValueAssignment.TermDefinition as ValueDefinition).Value.Value));
// mySelectValueAssignment.TermDefinition = typedValue;
//}
#endregion
lastElem.SelectValueAssignment = mySelectValueAssignment;
}
#endregion
}
GetAllSelectedAttributesFromVertex(SecurityToken mySecurityToken,
Int64 myTransactionToken,
IVertex myDBObject,
IVertexType myDBType,
Int64 myDepth,
EdgeList myLevelKey,
String myReference,
Boolean myUsingGraph)
{
IDictionary<String, Object> properties = new Dictionary<string, object>();
IDictionary<String, IEdgeView> edges = new Dictionary<string, IEdgeView>();
var Attributes = new Tuple<IDictionary<string, object>, IDictionary<string, IEdgeView>>(properties, edges);
Int64 Depth;
var minDepth = 0;
//save the already created LevelKey of the refernce type
EdgeList levelKey = myLevelKey;
IEnumerable<SelectionElement> attributeSelections = null;
attributeSelections = getAttributeSelections(myReference, myLevelKey);
if (attributeSelections.IsNullOrEmpty())
{
#region Get all attributes from the DBO if nothing special was selected
if ((myDepth == -1) || (myDepth >= myLevelKey.Level))
{
AddAttributesByDBO(mySecurityToken,
myTransactionToken,
ref Attributes,
myDBType,
myDBObject,
myDepth,
myLevelKey,
myReference,
myUsingGraph,
TypesOfSelect.Asterisk);
}
#endregion
}
else
{
foreach (var attrSel in attributeSelections)
{
#region extract the selected infos
//myDepth = attrSel.EdgeList.Level;
#region Some kind of asterisk - return all attributes
if (attrSel.Selection == TypesOfSelect.Asterisk)
{
#region Asterisk (*), Rhomb (#), Minus (-), Ad (@) selection
Depth = GetDepth(myDepth, 0, myDBType);
AddAttributesByDBO(mySecurityToken,
myTransactionToken,
ref Attributes,
myDBType,
myDBObject,
Depth,
myLevelKey,
myReference,
myUsingGraph,
attrSel.Selection,
attrSel.TypeID);
#endregion
continue;
}
#endregion
#region Alias
String alias = String.Empty;
if (attrSel.Element == null)
{
alias = (attrSel.Alias == null) ? attrSel.RelatedIDChainDefinition.UndefinedAttribute : attrSel.Alias;
}
else
{
alias = (attrSel.Alias == null) ? attrSel.Element.Name : attrSel.Alias;
}
#endregion
if (Attributes.Item1.ContainsKey(alias) || Attributes.Item2.ContainsKey(alias))
{
// This is a bug in the attributeSelections add method. No attribute should be in the selected list twice.
// If one attribute was selected more than one, these information will be stored in the next level.
//System.Diagnostics.Debug.Assert(false, "The attribute '" + alias + "' is selected twice in that level - this shouldnt!");
continue;
}
if (attrSel is SelectionElementFunction)
{
#region Select a function
var selectionElementFunction = (attrSel as SelectionElementFunction);
if (selectionElementFunction.SelectValueAssignment != null &&
selectionElementFunction.SelectValueAssignment.ValueAssignmentType == SelectValueAssignment.ValueAssignmentTypes.Always)
{
Attributes.Item1.Add(alias, (selectionElementFunction.SelectValueAssignment.TermDefinition as ValueDefinition).Value);
continue;
}
#region Get the CallingObject
Object callingObject = null;
if (myUsingGraph)
{
//a special attribute has no RelatedGraphDBTypeUUID. So use myDBType to create an EdgeKey
//EdgeKey key = (selectionElementFunction.Element is ASpecialTypeAttribute) ? new EdgeKey(myDBType.UUID, selectionElementFunction.Element.UUID) : new EdgeKey(selectionElementFunction.Element);
EdgeKey key = new EdgeKey(selectionElementFunction.Element.RelatedType.ID, selectionElementFunction.Element.ID);
//the levelKey is created with the type inside the select -- f.e. FROM User SELECT Friends.TOP(2) -- it is 'User'
//we have to check if the levelKey contains an edge of the VertexType which is equal to the related type of the selection element
//this is neccessary -- f.e. FROM User SELECT Friends.TOP(2) -- if the edge 'FRIENDS' is not defined on type User
//in this case we have to check if there is a parent type of the reference type which is equal to the related type of the selection element
if (levelKey.Edges.All(x => x.VertexTypeID != selectionElementFunction.Element.RelatedType.ID))
{
if (myDBType.GetAncestorVertexTypesAndSelf().Select(x => x.ID).Contains(selectionElementFunction.Element.RelatedType.ID))
{
var typeID = myDBType.GetAncestorVertexTypesAndSelf().Select(x => x.ID).Where(x => x == selectionElementFunction.Element.RelatedType.ID).First();
levelKey = new EdgeList(typeID);
}
}
myUsingGraph = _ExpressionGraph.IsGraphRelevant(new LevelKey((levelKey + key).Edges, _graphdb, mySecurityToken, myTransactionToken), myDBObject);
}
if (myUsingGraph && !(selectionElementFunction.Element.Kind != AttributeType.Property))
{
switch (selectionElementFunction.Element.Kind)
{
case AttributeType.IncomingEdge:
#region incoming edge
var incomingEdgeDefinition = (IIncomingEdgeDefinition)selectionElementFunction.Element;
if (myDBObject.HasIncomingVertices(incomingEdgeDefinition.RelatedEdgeDefinition.RelatedType.ID, incomingEdgeDefinition.RelatedEdgeDefinition.ID))
{
callingObject = _ExpressionGraph.Select(
new LevelKey(
(myLevelKey + new EdgeKey(selectionElementFunction.Element.RelatedType.ID, selectionElementFunction.Element.ID)).Edges,
_graphdb, mySecurityToken, myTransactionToken), myDBObject, true);
}
else
{
callingObject = null;
}
#endregion
break;
case AttributeType.OutgoingEdge:
#region outgoing edge
if (myDBObject.HasOutgoingEdge(selectionElementFunction.Element.ID))
{
callingObject = _ExpressionGraph.Select(
new LevelKey(
(myLevelKey + new EdgeKey(selectionElementFunction.Element.RelatedType.ID, selectionElementFunction.Element.ID)).Edges,
_graphdb, mySecurityToken, myTransactionToken), myDBObject, true);
}
else
{
callingObject = null;
}
#endregion
break;
case AttributeType.Property:
callingObject = GetCallingObject(myDBObject, selectionElementFunction.Element);
break;
case AttributeType.BinaryProperty:
default:
continue;
}
}
else
{
callingObject = GetCallingObject(myDBObject, selectionElementFunction.Element);
}
#endregion
#region Execute the function
var res = ExecuteFunction(selectionElementFunction,
myDBObject,
callingObject,
myDepth,
myReference,
myDBType,
myLevelKey,
myUsingGraph,
mySecurityToken,
myTransactionToken);
if (res == null)
{
continue;
}
#endregion
#region Add function return value to attributes
if (res.Value is IEnumerable<IVertex>)
{
#region Reference edge
//minDepth = attrSel.EdgeList.Level + 1; // depth should be at least the depth of the selected element
minDepth = (attrSel.RelatedIDChainDefinition != null) ? attrSel.RelatedIDChainDefinition.Edges.Count - 1 : 0;
myUsingGraph = false;
Depth = GetDepth(myDepth, minDepth, myDBType);
var attr = (attrSel as SelectionElementFunction).Element;
//if (Depth > myLevelKey.Level || getAttributeSelections(myReference, myLevelKey + new EdgeKey(attr.RelatedType.ID, attr.ID)).IsNotNullOrEmpty())
if (Depth > levelKey.Level || getAttributeSelections(myReference, levelKey + new EdgeKey(attr.RelatedType.ID, attr.ID)).IsNotNullOrEmpty())
{
myUsingGraph = false;
#region Resolve DBReferences
Attributes.Item2.Add(alias,
ResolveAttributeValue((IOutgoingEdgeDefinition)attr,
(IEnumerable<IVertex>)res.Value,
Depth,
myLevelKey,
myDBObject,
myReference,
myUsingGraph,
mySecurityToken,
myTransactionToken));
#endregion
}
else
{
Attributes.Item2.Add(alias, GetNotResolvedReferenceEdgeAttributeValue((IEnumerable<IVertex>)res.Value));
}
#endregion
}
else if (res.Value is IVertexView)
{
//the result is one or multiple 'paths'
if ((res.Value as IVertexView).HasEdge("path"))
{
var pathHyperEdge = (res.Value as IVertexView).GetAllHyperEdges().First();
if (!String.IsNullOrWhiteSpace(attrSel.Alias))
{
Attributes.Item2.Add(attrSel.Alias, pathHyperEdge.Edge);
}
else
Attributes.Item2.Add(pathHyperEdge.EdgeName, pathHyperEdge.Edge);
}
}
else
{
Attributes.Item1.Add(alias, res.Value);
}
#endregion
#endregion
}
else if (attrSel.Element is UnstructuredProperty)
{
#region undefined attribute selection
var undef_alias = attrSel.Alias;
if (!Attributes.Item1.ContainsKey(undef_alias))
{
Object attrValue = null;
if (myDBObject.HasUnstructuredProperty(undef_alias))
{
Attributes.Item1.Add(undef_alias, attrValue);
}
}
#endregion
}
else
{
#region Attribute selection
minDepth = (attrSel.RelatedIDChainDefinition != null) ? attrSel.RelatedIDChainDefinition.Edges.Count - 1 : 0;
//var alias = (attrSel.Alias == null) ? (attrSel.Element as TypeAttribute).Name : attrSel.Alias;
Depth = GetDepth(myDepth, minDepth, myDBType, attrSel.Element);
Object attrValue = null;
if (GetAttributeValueAndResolve(mySecurityToken, myTransactionToken, myDBType, attrSel, myDBObject, Depth, myLevelKey, myReference, myUsingGraph, out attrValue))
{
if (attrValue is IEdgeView)
{
Attributes.Item2.Add(alias, (IEdgeView)attrValue);
}
else
{
Attributes.Item1.Add(alias, attrValue);
}
}
#endregion
}
#endregion
}
}
return Attributes;
}
public Boolean Equals(EdgeList p)
{
// If parameter is null return false:
if ((object)p == null)
{
return false;
}
if (this.Level != p.Level)
{
return false;
}
for (int i = 0; i < Edges.Count; i++)
{
if (this.Edges[i] != p.Edges[i])
{
return false;
}
}
return true;
}
public SelectionElementAggregate(IGQLAggregate myBaseAggregate, string myAlias, EdgeList myEdgeList, LevelKey myLevelKey, IDChainDefinition myRelatedIDChainDefinition, AggregateDefinition myAggregateDefinition)
{
Alias = myAlias;
EdgeList = myEdgeList;
LevelKey = myLevelKey;
Aggregate = myBaseAggregate;
AggregateDefinition = myAggregateDefinition;
RelatedIDChainDefinition = myRelatedIDChainDefinition;
}
public bool StartsWith(EdgeList myLevel, Boolean IncludingAttrs)
{
if (!IncludingAttrs)
return StartsWith(myLevel);
if (myLevel.Level > Level)
throw new ArgumentException(myLevel + " is greater than " + Level);
for (Int32 i = 0; i < myLevel.Level; i++)
{
if (myLevel.Edges[i].VertexTypeID != Edges[i].VertexTypeID || myLevel.Edges[i].AttributeID != Edges[i].AttributeID)
return false;
}
return true;
}
private IEnumerable<SingleEdgeView> GenerateSingleEdgeViews(SecurityToken mySecurityToken,
Int64 myTransactionToken,
IEnumerable<ISingleEdge> mySingleEdges,
IVertexType myVertexType,
long myDepth,
EdgeList myEdgeList,
string reference,
bool myUsingGraph,
IEdgeType myInnerEdgeType)
{
foreach (var aSingleEdge in mySingleEdges)
{
yield return GenerateASingleEdgeView(mySecurityToken,
myTransactionToken,
aSingleEdge,
myVertexType,
myDepth,
myEdgeList,
reference,
myUsingGraph,
myInnerEdgeType);
}
yield break;
}
/// <summary>
/// Initializes a new instance of the InvalidEdgeListOperationException using an edge key.
/// </summary>
/// <param name="myEdgeList"></param>
/// <param name="myEdgeKey"></param>
/// <param name="myOperation"></param>
/// <param name="innerException">The exception that is the cause of the current exception, this parameter can be NULL.</param>
public InvalidEdgeListOperationException(EdgeList myEdgeList, EdgeKey myEdgeKey, string myOperation, Exception innerException = null) : base(innerException)
{
_EdgeList1 = myEdgeList;
this._EdgeKey = myEdgeKey;
this._Operation = myOperation;
}
public SelectionElementAggregate(IGQLAggregate myBaseAggregate, string myAlias, EdgeList myEdgeList, LevelKey myLevelKey, IDChainDefinition myRelatedIDChainDefinition, AggregateDefinition myAggregateDefinition)
{
Alias = myAlias;
EdgeList = myEdgeList;
LevelKey = myLevelKey;
Aggregate = myBaseAggregate;
AggregateDefinition = myAggregateDefinition;
RelatedIDChainDefinition = myRelatedIDChainDefinition;
}
private SingleEdgeView GenerateASingleEdgeView(SecurityToken mySecurityToken,
Int64 myTransactionToken,
ISingleEdge aSingleEdge,
IVertexType myVertexType,
long myDepth,
EdgeList myEdgeList,
string reference,
bool myUsingGraph,
IEdgeType myInnerEdgeType)
{
return new SingleEdgeView(GetEdgeProperties(aSingleEdge, myInnerEdgeType),
LoadAndResolveVertex(mySecurityToken,
myTransactionToken,
aSingleEdge.GetTargetVertex(),
myVertexType,
myDepth,
myEdgeList,
reference,
myUsingGraph));
}
/// <summary>
/// Resolves an attribute
/// </summary>
private IEdgeView ResolveAttributeValue(IOutgoingEdgeDefinition attrDefinition,
IEnumerable<IVertex> attributeValue,
Int64 myDepth,
EdgeList myEdgeList,
IVertex mySourceDBObject,
String reference,
Boolean myUsingGraph,
SecurityToken mySecurityToken,
Int64 myTransactionToken)
{
#region Get levelKey and UsingGraph
if (myEdgeList.Level == 0)
{
myEdgeList = new EdgeList(new EdgeKey(attrDefinition.RelatedType.ID, attrDefinition.ID));
}
else
{
myEdgeList += new EdgeKey(attrDefinition.RelatedType.ID, attrDefinition.ID);
}
// at some deeper level we could get into graph independend results.
// From this time, we can use the GUID index rather than asking the graph all the time
if (myUsingGraph)
{
myUsingGraph = _ExpressionGraph.IsGraphRelevant(new LevelKey(myEdgeList.Edges,
_graphdb,
mySecurityToken,
myTransactionToken),
mySourceDBObject);
}
#endregion
if (attrDefinition.Multiplicity != EdgeMultiplicity.SingleEdge)
{
#region SetReference attribute -> return new Edge
IEnumerable<IVertexView> resultList = null;
if (myUsingGraph)
{
var dbos = _ExpressionGraph.Select(new LevelKey(myEdgeList.Edges,
_graphdb,
mySecurityToken,
myTransactionToken),
mySourceDBObject,
true);
resultList = GetVertices(mySecurityToken,
myTransactionToken,
attrDefinition.TargetVertexType,
dbos,
myDepth,
myEdgeList,
reference,
myUsingGraph);
}
else
{
resultList = GetVertices(mySecurityToken,
myTransactionToken,
attrDefinition.
TargetVertexType,
attributeValue,
myDepth,
myEdgeList,
reference,
myUsingGraph);
}
return new HyperEdgeView(null, resultList.Select(aTargetVertex => new SingleEdgeView(null, aTargetVertex)));
#endregion
}
else
{
#region Single reference
return new SingleEdgeView(null, LoadAndResolveVertex(mySecurityToken,
myTransactionToken,
attributeValue.FirstOrDefault(),
attrDefinition.SourceVertexType,
myDepth,
myEdgeList,
reference,
myUsingGraph));
#endregion
}
}
public bool StartsWith(EdgeList myLevel)
{
if (myLevel.Level > Level)
throw new ArgumentException(myLevel + " is greater than " + Level);
for (Int32 i = 0; i < myLevel.Level; i++)
{
if (myLevel.Edges[i].VertexTypeID != Edges[i].VertexTypeID)
return false;
}
return true;
}
