/// <summary>
/// Reads an attribute definition from the GraphML File and stores
/// it internal for later usage on vertex / edge reading.
/// </summary>
/// <param name='myReader'>
/// XmlReader
/// </param>
private void ReadAttributeDefinition(XmlReader myReader)
{
#region data
var attrId = myReader.GetAttribute(GraphMLTokens.ID);
var attrFor = myReader.GetAttribute(GraphMLTokens.FOR);
var attrName = myReader.GetAttribute(GraphMLTokens.ATTRIBUTE_NAME);
var attrType = myReader.GetAttribute(GraphMLTokens.ATTRIBUTE_TYPE).ToLower();
string attrDefault = null;
using (var readerAttribute = myReader.ReadSubtree())
{
while (readerAttribute.Read())
{
if (readerAttribute.Name == GraphMLTokens.DEFAULT)
{
attrDefault = readerAttribute.ReadElementContentAsString();
}
}
}
// make attribute type DB conform (capitalize first letter)
attrType = char.ToUpper(attrType[0]) + attrType.Substring(1).ToLower();
// and store the whole definition
_AttributeDefinitions.Add(attrId, new Tuple<string, string, string, string>(attrFor, attrName, attrType, attrDefault));
// get GraphDB internal type
attrType = GetInternalTypeName(attrType);
#endregion
#region alter vertex type with new attribute
if(attrFor.Equals(GraphMLTokens.VERTEX))
{
var requestAlterVertexType = new RequestAlterVertexType(_VertexTypeName);
var propertyPreDefinition = new PropertyPredefinition(attrName, attrType);
propertyPreDefinition.SetDefaultValue(attrDefault);
requestAlterVertexType.AddProperty(propertyPreDefinition);
_GraphDB.AlterVertexType(_SecurityToken,
_TransactionToken,
requestAlterVertexType,
(stats, vType) => vType);
}
#endregion
}
public static RequestAlterVertexType MakeRequestAlterVertexType(ServiceVertexType myVertexType, ServiceAlterVertexChangeset myChangeset)
{
var Request = new RequestAlterVertexType(myVertexType.Name);
#region Add Attributes
if (myChangeset.ToBeAddedProperties != null)
{
foreach (var toAdd in myChangeset.ToBeAddedProperties)
{
Request.AddProperty(toAdd.ToPropertyPredefinition());
}
}
if (myChangeset.ToBeAddedIncomingEdges != null)
{
foreach (var toAdd in myChangeset.ToBeAddedIncomingEdges)
{
Request.AddIncomingEdge(toAdd.ToIncomingEdgePredefinition());
}
}
if (myChangeset.ToBeAddedOutgoingEdges != null)
{
foreach (var toAdd in myChangeset.ToBeAddedOutgoingEdges)
{
Request.AddOutgoingEdge(toAdd.ToOutgoingEdgePredefinition());
}
}
if (myChangeset.ToBeAddedUniques != null)
{
foreach (var toAdd in myChangeset.ToBeAddedUniques)
{
Request.AddUnique(toAdd.ToUniquePredefinition());
}
}
if (myChangeset.ToBeAddedMandatories != null)
{
foreach (var toAdd in myChangeset.ToBeAddedMandatories)
{
Request.AddMandatory(toAdd.ToMandatoryPredefinition());
}
}
if (myChangeset.ToBeAddedIndices != null)
{
foreach (var toAdd in myChangeset.ToBeAddedIndices)
{
Request.AddIndex(toAdd.ToIndexPredefinition());
}
}
#endregion
#region Remove Attributes
if (myChangeset.ToBeRemovedProperties != null)
{
foreach (var toDel in myChangeset.ToBeRemovedProperties)
{
Request.RemoveProperty(toDel);
}
}
if (myChangeset.ToBeRemovedIncomingEdges != null)
{
foreach (var toDel in myChangeset.ToBeRemovedIncomingEdges)
{
Request.RemoveIncomingEdge(toDel);
}
}
if (myChangeset.ToBeRemovedOutgoingEdges != null)
{
foreach (var toDel in myChangeset.ToBeRemovedOutgoingEdges)
{
Request.RemoveOutgoingEdge(toDel);
}
}
if (myChangeset.ToBeRemovedUniques != null)
{
foreach (var toDel in myChangeset.ToBeRemovedUniques)
{
Request.RemoveUnique(toDel);
}
}
if (myChangeset.ToBeRemovedMandatories != null)
{
foreach (var toDel in myChangeset.ToBeRemovedMandatories)
{
Request.RemoveMandatory(toDel);
}
}
if (myChangeset.ToBeRemovedIndices != null)
{
foreach (var toDel in myChangeset.ToBeRemovedIndices)
{
Request.RemoveIndex(toDel.Key, toDel.Value);
}
}
#endregion
#region define / undefine
if (myChangeset.ToBeDefinedAttributes != null)
{
foreach (var toDefine in myChangeset.ToBeDefinedAttributes)
{
Request.DefineAttribute(toDefine.ToUnknownAttributePredefinition());
}
}
if (myChangeset.ToBeUndefinedAttributes != null)
{
foreach (var toUndefine in myChangeset.ToBeUndefinedAttributes)
{
Request.UndefineAttribute(toUndefine);
}
}
#endregion
#region Rename Task
if (myChangeset.ToBeRenamedProperties != null)
{
foreach (var toRename in myChangeset.ToBeRenamedProperties)
{
Request.RenameAttribute(toRename.Key, toRename.Value);
}
}
#endregion
if (myChangeset.Comment != null)
Request.SetComment(myChangeset.Comment);
if (myChangeset.NewTypeName != null)
Request.RenameType(myChangeset.NewTypeName);
//todo add unknown attribute
return Request;
}
public override IVertexType AlterVertexType(RequestAlterVertexType myAlterVertexTypeRequest, SecurityToken mySecurityToken, TransactionToken myTransactionToken)
{
var vertexType = _vertexTypeManager.GetVertexType(myAlterVertexTypeRequest.VertexTypeName, myTransactionToken, mySecurityToken);
if (myAlterVertexTypeRequest.ToBeAddedUnknownAttributes != null)
{
var toBeConverted = myAlterVertexTypeRequest.ToBeAddedUnknownAttributes.ToArray();
foreach (var unknown in toBeConverted)
{
if (BinaryPropertyPredefinition.TypeName.Equals(unknown.AttributeType))
{
var prop = ConvertUnknownToBinaryProperty(unknown);
myAlterVertexTypeRequest.AddBinaryProperty(prop);
}
else if (IsBaseType(unknown.AttributeType))
{
var prop = ConvertUnknownToProperty(unknown);
myAlterVertexTypeRequest.AddProperty(prop);
}
else if (unknown.AttributeType.Contains(IncomingEdgePredefinition.TypeSeparator))
{
var prop = ConvertUnknownToIncomingEdge(unknown);
myAlterVertexTypeRequest.AddIncomingEdge(prop);
}
else
{
var prop = ConvertUnknownToOutgoingEdge(unknown);
myAlterVertexTypeRequest.AddOutgoingEdge(prop);
}
}
myAlterVertexTypeRequest.ResetUnknown();
}
if (myAlterVertexTypeRequest.ToBeRemovedUnknownAttributes != null)
{
foreach (var unknownProp in myAlterVertexTypeRequest.ToBeRemovedUnknownAttributes)
{
var attrDef = vertexType.GetAttributeDefinition(unknownProp);
if (attrDef == null)
throw new VertexAttributeIsNotDefinedException(unknownProp);
switch (attrDef.Kind)
{
case AttributeType.Property:
myAlterVertexTypeRequest.RemoveProperty(unknownProp);
break;
case AttributeType.OutgoingEdge:
myAlterVertexTypeRequest.RemoveOutgoingEdge(unknownProp);
break;
case AttributeType.IncomingEdge:
myAlterVertexTypeRequest.RemoveIncomingEdge(unknownProp);
break;
case AttributeType.BinaryProperty:
myAlterVertexTypeRequest.RemoveBinaryProperty(unknownProp);
break;
default:
throw new Exception("The enumeration AttributeType was changed, but not this switch statement.");
}
}
myAlterVertexTypeRequest.ClearToBeRemovedUnknownAttributes();
}
#region checks
CheckToBeAddedAttributes(myAlterVertexTypeRequest, vertexType);
CheckToBeRemovedAttributes(myAlterVertexTypeRequest, vertexType);
CheckToBeRenamedAttributes(myAlterVertexTypeRequest, vertexType);
CheckNewVertexTypeName(myAlterVertexTypeRequest.AlteredVertexTypeName, mySecurityToken, myTransactionToken);
CheckToBeAddedMandatory(myAlterVertexTypeRequest, vertexType);
CheckToBeAddedUniques(myAlterVertexTypeRequest, vertexType);
CheckToBeRemovedMandatoryAndUnique(myAlterVertexTypeRequest.ToBeRemovedMandatories, myAlterVertexTypeRequest.ToBeRemovedUniques, vertexType);
CheckToBeAddedIndices(myAlterVertexTypeRequest.ToBeAddedIndices, vertexType);
CheckToBeRemovedIndices(myAlterVertexTypeRequest.ToBeRemovedIndices, vertexType);
#endregion
return null;
}
