public override Exceptional<FuncParameter> Aggregate(AAttributeIndex attributeIndex, GraphDBType graphDBType, DBContext dbContext)
{
if (attributeIndex.IsUUIDIndex)
{
return new Exceptional<FuncParameter>(new Error_NotImplemented(new System.Diagnostics.StackTrace(true), "AVG(UUID) is not implemented!"));
}
var indexRelatedType = dbContext.DBTypeManager.GetTypeByUUID(attributeIndex.IndexRelatedTypeUUID);
// HACK: rewrite as soon as we have real attribute index keys
ADBBaseObject aADBBaseObject = new DBDouble(DBObjectInitializeType.Default);
DBUInt64 total = new DBUInt64((UInt64)0);
foreach (var idxEntry in attributeIndex.GetKeyValues(indexRelatedType, dbContext))
{
aADBBaseObject.Add(aADBBaseObject.Clone(idxEntry.Key));
total += (UInt64)idxEntry.Value.LongCount();
}
aADBBaseObject.Div(total);
return new Exceptional<FuncParameter>(new FuncParameter(aADBBaseObject));
}
private static Boolean ConvertToBestMatchingTypeReverse(ref ADBBaseObject myDBBaseObjectB, ref ADBBaseObject myDBBaseObjectA)
{
#region Both are not unknown
if ((myDBBaseObjectA.Type != BasicType.Unknown) && (myDBBaseObjectB.Type != BasicType.Unknown))
{
#region Types matching, we can leave
if (myDBBaseObjectA.Type == myDBBaseObjectB.Type)
{
return true;
}
#endregion
#region DBList and DBReference are not matchable with other types
else if (myDBBaseObjectA is DBEdge || myDBBaseObjectA is DBReference || myDBBaseObjectB is DBEdge || myDBBaseObjectB is DBReference)
{
return false;
}
#endregion
#region The types does not match - so try to convert the right-handed to the left handed type
else if (myDBBaseObjectA is DBUInt64)
{
//
if (DBUInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return true;
}
return false;
}
else if (myDBBaseObjectA is DBInt64)
{
//
if (DBInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return true;
}
// do not change to ConvertToBestMatchingType(ref myDBBaseObjectB, ref myDBBaseObjectA)
return false;
}
else if (myDBBaseObjectA is DBDouble)
{
//
if (DBDouble.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return true;
}
return false;
}
else if (myDBBaseObjectA is DBDateTime)
{
//
if (DBDateTime.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return true;
}
return false;
}
else if (myDBBaseObjectA is DBBoolean)
{
//
if (DBDouble.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return true;
}
return false;
}
else if (myDBBaseObjectA is DBString)
{
//
if (DBString.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return true;
}
return false;
}
#endregion
// we couldnt find a matching type for both are not unknown
return false;
}
#endregion
#region Both are strings - thats fine
else if (myDBBaseObjectA is DBString && myDBBaseObjectB is DBString)
{
return true;
}
#endregion
#region only one is unknown
else if (!(myDBBaseObjectA.Type == BasicType.Unknown && myDBBaseObjectB.Type == BasicType.Unknown))
{
#region myDBBaseObjectA is unknown - try to use the type of myDBBaseObjectB
if (myDBBaseObjectA.Type == BasicType.Unknown)
{
try
{
// avaoid changing a Double to Int64
if (myDBBaseObjectA is DBNumber
&& (myDBBaseObjectB.Type == BasicType.Int64 || myDBBaseObjectB.Type == BasicType.UInt64))
{
if (myDBBaseObjectA.Value is Double && DBDouble.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBDouble(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBDouble(myDBBaseObjectB.Value);
return true;
}
}
myDBBaseObjectA = myDBBaseObjectB.Clone(myDBBaseObjectA.Value);
}
catch
{
return false;
}
}
#endregion
#region myDBBaseObjectB is unknown - try to use the type of myDBBaseObjectA
else if (myDBBaseObjectB.Type == BasicType.Unknown)
{
try
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
}
catch
{
return false;
}
}
else
{
return false;
}
#endregion
}
#endregion
#region both are unknown
#region One of them is expected as a Number - so try to parse both as a number
else if (myDBBaseObjectA is DBNumber || myDBBaseObjectB is DBNumber)
{
if (DBInt64.IsValid(myDBBaseObjectA.Value) && DBInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBInt64(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBInt64(myDBBaseObjectB.Value);
}
else if (DBUInt64.IsValid(myDBBaseObjectA.Value) && DBUInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBUInt64(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBUInt64(myDBBaseObjectB.Value);
}
else if (DBDouble.IsValid(myDBBaseObjectA.Value) && DBDouble.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBDouble(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBDouble(myDBBaseObjectB.Value);
}
else
{
return false;
}
}
#endregion
#region Try all other dataTypes
else
{
// check all types beginning with the hardest and ending with string (matches all)
if (DBDateTime.IsValid(myDBBaseObjectA.Value) && DBDateTime.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBDateTime(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBDateTime(myDBBaseObjectB.Value);
}
else if (DBBoolean.IsValid(myDBBaseObjectA.Value) && DBBoolean.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBBoolean(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBBoolean(myDBBaseObjectB.Value);
}
else if (DBEdge.IsValid(myDBBaseObjectA.Value) && DBEdge.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBEdge(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBEdge(myDBBaseObjectB.Value);
}
else if (DBReference.IsValid(myDBBaseObjectA.Value) && DBReference.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBReference(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBReference(myDBBaseObjectB.Value);
}
else if (DBString.IsValid(myDBBaseObjectA.Value) && DBString.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBString(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBString(myDBBaseObjectB.Value);
}
else
{
return false;
}
}
#endregion
#endregion
return true;
}
public static Exceptional<Boolean> ConvertToBestMatchingType(ref ADBBaseObject myDBBaseObjectA, ref ADBBaseObject myDBBaseObjectB)
{
#region Both are not unknown
if ((myDBBaseObjectA.Type != BasicType.Unknown) && (myDBBaseObjectB.Type != BasicType.Unknown))
{
#region Types matching, we can leave
if (myDBBaseObjectA.Type == myDBBaseObjectB.Type)
{
return new Exceptional<Boolean>(true);
}
#endregion
#region DBList and DBReference are not matchable with other types
else if (myDBBaseObjectA is DBEdge || myDBBaseObjectB is DBEdge)
{
return new Exceptional<Boolean>(false);
}
#endregion
#region The types does not match - so try to convert the right-handed to the left handed type
else if (myDBBaseObjectA is DBUInt64)
{
//
if (DBUInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return new Exceptional<Boolean>(true);
}
return new Exceptional<Boolean>(ConvertToBestMatchingTypeReverse(ref myDBBaseObjectA, ref myDBBaseObjectB));
}
else if (myDBBaseObjectA is DBInt64)
{
//
if (DBInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return new Exceptional<Boolean>(true);
}
return new Exceptional<Boolean>(ConvertToBestMatchingTypeReverse(ref myDBBaseObjectA, ref myDBBaseObjectB));
}
else if (myDBBaseObjectA is DBInt32)
{
//
if (DBInt32.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return new Exceptional<Boolean>(true);
}
return new Exceptional<Boolean>(ConvertToBestMatchingTypeReverse(ref myDBBaseObjectA, ref myDBBaseObjectB));
}
else if (myDBBaseObjectA is DBDouble)
{
//
if (DBDouble.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return new Exceptional<Boolean>(true);
}
return new Exceptional<Boolean>(ConvertToBestMatchingTypeReverse(ref myDBBaseObjectA, ref myDBBaseObjectB));
}
else if (myDBBaseObjectA is DBDateTime)
{
//
if (DBDateTime.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return new Exceptional<Boolean>(true);
}
return new Exceptional<Boolean>(ConvertToBestMatchingTypeReverse(ref myDBBaseObjectA, ref myDBBaseObjectB));
}
else if (myDBBaseObjectA is DBBoolean)
{
//
if (DBBoolean.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
return new Exceptional<Boolean>(true);
}
return new Exceptional<Boolean>(ConvertToBestMatchingTypeReverse(ref myDBBaseObjectA, ref myDBBaseObjectB));
}
#endregion
// we couldnt find a matching type for both are not unknown
return new Exceptional<bool>(new Error_NotImplemented(new StackTrace(true), String.Format("no type conversion implemented for {0} and {1}", myDBBaseObjectA.GetType(), myDBBaseObjectB.GetType())));
}
#endregion
#region Both are strings - thats fine
else if (myDBBaseObjectA is DBString && myDBBaseObjectB is DBString)
{
return new Exceptional<Boolean>(true);
}
#endregion
#region only one is unknown
else if (!(myDBBaseObjectA.Type == BasicType.Unknown && myDBBaseObjectB.Type == BasicType.Unknown))
{
#region myDBBaseObjectA is unknown - try to use the type of myDBBaseObjectB
if (myDBBaseObjectA.Type == BasicType.Unknown)
{
// avoid changing a Double to Int64
if (myDBBaseObjectA is DBNumber
&& (myDBBaseObjectB.Type == BasicType.Int64 || myDBBaseObjectB.Type == BasicType.UInt64))
{
if (myDBBaseObjectA.Value is Double && DBDouble.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBDouble(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBDouble(myDBBaseObjectB.Value);
return new Exceptional<bool>(true);
}
}
try
{
myDBBaseObjectA = myDBBaseObjectB.Clone(myDBBaseObjectA.Value);
}
catch
{
return new Exceptional<bool>(new Error_DataTypeDoesNotMatch(myDBBaseObjectB.GetType().Name, myDBBaseObjectA.Value.GetType().Name));
}
}
#endregion
#region myDBBaseObjectB is unknown - try to use the type of myDBBaseObjectA
else if (myDBBaseObjectB.Type == BasicType.Unknown)
{
// avoid changing a Double to Int64
if (myDBBaseObjectB is DBNumber
&& (myDBBaseObjectA.Type == BasicType.Int64 || myDBBaseObjectA.Type == BasicType.UInt64))
{
if (myDBBaseObjectB.Value is Double && DBDouble.IsValid(myDBBaseObjectA.Value))
{
myDBBaseObjectA = new DBDouble(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBDouble(myDBBaseObjectB.Value);
return new Exceptional<bool>(true);
}
}
try
{
myDBBaseObjectB = myDBBaseObjectA.Clone(myDBBaseObjectB.Value);
}
catch
{
return new Exceptional<bool>(new Error_DataTypeDoesNotMatch(myDBBaseObjectA.Value.GetType().ToString(), myDBBaseObjectB.GetType().ToString()));
}
}
else
{
return new Exceptional<bool>(false);
}
#endregion
}
#endregion
#region both are unknown
#region One of them is expected as a Number - so try to parse both as a number
else if (myDBBaseObjectA is DBNumber || myDBBaseObjectB is DBNumber)
{
if (DBInt64.IsValid(myDBBaseObjectA.Value) && DBInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBInt64(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBInt64(myDBBaseObjectB.Value);
}
else if (DBUInt64.IsValid(myDBBaseObjectA.Value) && DBUInt64.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBUInt64(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBUInt64(myDBBaseObjectB.Value);
}
else if (DBDouble.IsValid(myDBBaseObjectA.Value) && DBDouble.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBDouble(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBDouble(myDBBaseObjectB.Value);
}
else
{
return new Exceptional<Boolean>(false);
}
}
#endregion
#region Try all other dataTypes
else
{
// check all types beginning with the hardest and ending with string (matches all)
if (DBDateTime.IsValid(myDBBaseObjectA.Value) && DBDateTime.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBDateTime(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBDateTime(myDBBaseObjectB.Value);
}
else if (DBBoolean.IsValid(myDBBaseObjectA.Value) && DBBoolean.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBBoolean(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBBoolean(myDBBaseObjectB.Value);
}
else if (DBEdge.IsValid(myDBBaseObjectA.Value) && DBEdge.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBEdge(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBEdge(myDBBaseObjectB.Value);
}
else if (DBReference.IsValid(myDBBaseObjectA.Value) && DBReference.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBReference(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBReference(myDBBaseObjectB.Value);
}
else if (DBString.IsValid(myDBBaseObjectA.Value) && DBString.IsValid(myDBBaseObjectB.Value))
{
myDBBaseObjectA = new DBString(myDBBaseObjectA.Value);
myDBBaseObjectB = new DBString(myDBBaseObjectB.Value);
}
else
{
return new Exceptional<Boolean>(false);
}
}
#endregion
#endregion
return new Exceptional<bool>(true);
}
private void Serialize(ref SerializationWriter mySerializationWriter, DBUInt64 myValue)
{
mySerializationWriter.WriteUInt64((UInt64)myValue._Value);
}
private object Deserialize(ref SerializationReader mySerializationReader, DBUInt64 myValue)
{
myValue._Value = mySerializationReader.ReadUInt64();
return myValue;
}