// Builds a map from foreign key values to list of modification commands, with an entry for every command
// that may need to precede some other command involving that foreign key value.
private Dictionary <IKeyValueIndex, List <ModificationCommand> > CreateKeyValuePredecessorMap(
Graph <ModificationCommand> commandGraph)
{
var predecessorsMap = new Dictionary <IKeyValueIndex, List <ModificationCommand> >();
foreach (var command in commandGraph.Vertices)
{
var columnModifications = command.ColumnModifications;
if (command.EntityState == EntityState.Modified ||
command.EntityState == EntityState.Added)
{
// ReSharper disable once ForCanBeConvertedToForeach
for (var i = 0; i < command.Entries.Count; i++)
{
var entry = command.Entries[i];
// TODO: Perf: Consider only adding foreign keys defined on entity types involved in a modification
foreach (var foreignKey in entry.EntityType.GetReferencingForeignKeys())
{
var keyValueIndexFactory =
_keyValueIndexFactorySource.GetKeyValueIndexFactory(foreignKey.PrincipalKey);
var candidateKeyValueColumnModifications = columnModifications.Where(
cm =>
foreignKey.PrincipalKey.Properties.Contains(cm.Property) &&
(cm.IsWrite || cm.IsRead));
if (command.EntityState == EntityState.Added ||
candidateKeyValueColumnModifications.Any())
{
var principalKeyValue =
keyValueIndexFactory.CreatePrincipalKeyValue((InternalEntityEntry)entry, foreignKey);
if (principalKeyValue != null)
{
if (!predecessorsMap.TryGetValue(principalKeyValue, out var predecessorCommands))
{
predecessorCommands = new List <ModificationCommand>();
predecessorsMap.Add(principalKeyValue, predecessorCommands);
}
predecessorCommands.Add(command);
}
}
}
}
}
if (command.EntityState == EntityState.Modified ||
command.EntityState == EntityState.Deleted)
{
foreach (var entry in command.Entries)
{
foreach (var foreignKey in entry.EntityType.GetForeignKeys())
{
var keyValueIndexFactory = _keyValueIndexFactorySource.GetKeyValueIndexFactory(foreignKey.PrincipalKey);
var currentForeignKey = foreignKey;
var foreignKeyValueColumnModifications = columnModifications.Where(
cm =>
currentForeignKey.Properties.Contains(cm.Property) && (cm.IsWrite || cm.IsRead));
if (command.EntityState == EntityState.Deleted ||
foreignKeyValueColumnModifications.Any())
{
var dependentKeyValue =
keyValueIndexFactory.CreateDependentKeyValueFromOriginalValues((InternalEntityEntry)entry, foreignKey);
if (dependentKeyValue != null)
{
if (!predecessorsMap.TryGetValue(dependentKeyValue, out var predecessorCommands))
{
predecessorCommands = new List <ModificationCommand>();
predecessorsMap.Add(dependentKeyValue, predecessorCommands);
}
predecessorCommands.Add(command);
}
}
}
}
}
}
return(predecessorsMap);
}
// Builds a map from foreign key values to list of modification commands, with an entry for every command
// that may need to precede some other command involving that foreign key value.
private Dictionary <IKeyValueIndex, List <ModificationCommand> > CreateKeyValuePredecessorMap(
Multigraph <ModificationCommand, IAnnotatable> commandGraph)
{
var predecessorsMap = new Dictionary <IKeyValueIndex, List <ModificationCommand> >();
foreach (var command in commandGraph.Vertices)
{
var columnModifications = command.ColumnModifications;
if (command.EntityState == EntityState.Modified ||
command.EntityState == EntityState.Added)
{
// ReSharper disable once ForCanBeConvertedToForeach
for (var i = 0; i < command.Entries.Count; i++)
{
var entry = command.Entries[i];
foreach (var foreignKey in entry.EntityType.GetReferencingForeignKeys())
{
var constraints = foreignKey.GetMappedConstraints()
.Where(c => c.PrincipalTable.Name == command.TableName && c.PrincipalTable.Schema == command.Schema);
var candidateKeyValueColumnModifications = columnModifications.Where(
cm => (cm.IsWrite || cm.IsRead) && foreignKey.PrincipalKey.Properties.Contains(cm.Property));
if (!constraints.Any() ||
(command.EntityState == EntityState.Modified &&
!candidateKeyValueColumnModifications.Any()))
{
continue;
}
var principalKeyValue = _keyValueIndexFactorySource
.GetKeyValueIndexFactory(foreignKey.PrincipalKey)
.CreatePrincipalKeyValue((InternalEntityEntry)entry, foreignKey);
if (principalKeyValue != null)
{
if (!predecessorsMap.TryGetValue(principalKeyValue, out var predecessorCommands))
{
predecessorCommands = new List <ModificationCommand>();
predecessorsMap.Add(principalKeyValue, predecessorCommands);
}
predecessorCommands.Add(command);
}
}
}
}
if (command.EntityState == EntityState.Modified ||
command.EntityState == EntityState.Deleted)
{
foreach (var entry in command.Entries)
{
foreach (var foreignKey in entry.EntityType.GetForeignKeys())
{
var constraints = foreignKey.GetMappedConstraints();
var foreignKeyValueColumnModifications = columnModifications.Where(
cm => (cm.IsWrite || cm.IsRead) && foreignKey.Properties.Contains(cm.Property));
if (!constraints.Any() ||
(command.EntityState == EntityState.Modified &&
!foreignKeyValueColumnModifications.Any()))
{
continue;
}
var dependentKeyValue = _keyValueIndexFactorySource
.GetKeyValueIndexFactory(foreignKey.PrincipalKey)
.CreateDependentKeyValueFromOriginalValues((InternalEntityEntry)entry, foreignKey);
if (dependentKeyValue != null)
{
if (!predecessorsMap.TryGetValue(dependentKeyValue, out var predecessorCommands))
{
predecessorCommands = new List <ModificationCommand>();
predecessorsMap.Add(dependentKeyValue, predecessorCommands);
}
predecessorCommands.Add(command);
}
}
}
}
}
return(predecessorsMap);
}