private void ProcessMappingFragment(EntityInfo info, EntityType table, MappingFragment frag)
{
// move any scalar mappings to this fragment if they aren't there
foreach (var sp in info.NonKeyScalars)
{
Debug.Assert(sp.ColumnName.Target != null, "Found a ScalarProperty with an unknown column binding");
if (sp.ColumnName.Target.Parent == table
&& sp.MappingFragment != frag)
{
// delete the old, create the new
AddToDeleteList(sp);
var cmd = new CreateFragmentScalarPropertyTreeCommand(frag, sp.GetMappedPropertiesList(), sp.ColumnName.Target);
var cp = new CommandProcessor(_cpc, cmd);
cp.Invoke();
}
}
// move any conditions to this fragment if they aren't there
foreach (var cond in info.Conditions)
{
Debug.Assert(cond.ColumnName.Target != null, "Found a Condition with an unknown column binding");
if (cond.ColumnName.Target.Parent == table
&& cond.MappingFragment != frag)
{
// save off the condition information
bool? isNull = null;
if (cond.IsNull.Value == Condition.IsNullConstant)
{
isNull = true;
}
else if (cond.IsNull.Value == Condition.IsNotNullConstant)
{
isNull = false;
}
var conditionValue = cond.Value.Value;
var column = cond.ColumnName.Target;
// delete the old, create the new
AddToDeleteList(cond);
var cmd = new CreateFragmentConditionCommand(frag, column, isNull, conditionValue);
var cp = new CommandProcessor(_cpc, cmd);
cp.Invoke();
}
}
// build a list of all of the keys
var keysToMap = new List<Property>();
keysToMap.AddRange(info.KeyProperties);
// move any key scalar mappings to this fragment if they exist in a different one - provided they are for the same table
foreach (var sp in info.KeyScalars)
{
Debug.Assert(sp.ColumnName.Target != null, "Found a ScalarProperty with an unknown column binding");
if (sp.ColumnName.Target.Parent == table
&& sp.MappingFragment != frag)
{
var property = sp.Name.Target;
var column = sp.ColumnName.Target;
// delete the old, create the new
AddToDeleteList(sp);
var cmd = new CreateFragmentScalarPropertyCommand(frag, property, column);
var cp = new CommandProcessor(_cpc, cmd);
cp.Invoke();
}
// since we've mapped this one now, remove it from our list of things to do
keysToMap.Remove(sp.Name.Target);
}
// if its TPH, all keys need to be here
// (Note: if it's not TPH the user needs to specify any missing keys manually)
if (info.InheritanceStrategy == InheritanceMappingStrategy.TablePerHierarchy)
{
// loop through the base most type's keys and add those that we haven't mapped
foreach (var keyRemaining in keysToMap)
{
var sp = FindKeyMappingInAllParents(info, keyRemaining);
if (sp != null
&& sp.ColumnName.Target != null
&& sp.ColumnName.Target.Parent == table)
{
var cmd = new CreateFragmentScalarPropertyCommand(frag, sp.Name.Target, sp.ColumnName.Target);
var cp = new CommandProcessor(_cpc, cmd);
cp.Invoke();
}
}
}
// replicate all non-key base type scalars here if the parent uses a Default ETM
// (since there is no parent IsTypeOf ETM from which to "inherit" them)
if (info.Parent != null
&& info.Parent.UsesEntityTypeMappingKind(EntityTypeMappingKind.Default))
{
// first gather the list of scalars from all parents
var parentScalars = new List<ScalarProperty>();
GatherNonKeyScalarsFromAllParents(info.Parent, parentScalars);
// then build a list of those scalars used in our fragment
var existingMappedProperties = new HashSet<Property>();
foreach (var existingScalar in frag.ScalarProperties())
{
existingMappedProperties.Add(existingScalar.Name.Target);
}
// finally, add those in that aren't already in the fragment
foreach (var sp in parentScalars)
{
Debug.Assert(sp.ColumnName.Target != null, "Found a ScalarProperty with an unknown column binding");
// don't duplicate and only add those that use the same table as us
if (existingMappedProperties.Contains(sp.Name.Target) == false
&& sp.ColumnName.Target.EntityType == table)
{
var cmd = new CreateFragmentScalarPropertyTreeCommand(frag, sp.GetMappedPropertiesList(), sp.ColumnName.Target);
var cp = new CommandProcessor(_cpc, cmd);
cp.Invoke();
existingMappedProperties.Add(sp.Name.Target);
}
}
}
// make sure that we don't have any extra scalars
// so gather the list of all SPs we expect to be here
var expectedMappedProperties = new List<Property>();
expectedMappedProperties.AddRange(info.KeyProperties);
expectedMappedProperties.AddRange(info.NonKeyProperties);
if (info.Parent != null
&& info.Parent.UsesEntityTypeMappingKind(EntityTypeMappingKind.Default))
{
GatherNonKeyPropertiesFromAllParents(info.Parent, expectedMappedProperties);
}
// remove any that aren't in our expected list
foreach (var sp in frag.ScalarProperties())
{
if (expectedMappedProperties.Contains(sp.Name.Target) == false)
{
AddToDeleteList(sp);
}
}
}
internal override void CreateModelItem(CommandProcessorContext cpc, EditingContext context, EFElement underlyingModelItem)
{
Debug.Assert(context != null, "context must not be null");
Debug.Assert(Condition == null, "Don't call this method if we already have a ModelItem");
Debug.Assert(MappingStorageEntityType.StorageEntityType != null, "The parent item isn't set up correctly");
Debug.Assert(underlyingModelItem != null, "underlyingModelItem must not be null");
var tableColumn = underlyingModelItem as Property;
Debug.Assert(
tableColumn != null, "underlyingModelItem must be of type Property, actual type = " + underlyingModelItem.GetType().FullName);
// store this off in case we have recover the condition later (if it moves to another ETM on us)
_modelItemColumnName = tableColumn.LocalName.Value;
Context = context;
// local shortcuts
EntityType entityType = MappingConceptualEntityType.ConceptualEntityType;
// create a context if we weren't passed one
if (cpc == null)
{
cpc = new CommandProcessorContext(
Context, EfiTransactionOriginator.MappingDetailsOriginatorId, Resources.Tx_CreateCondition);
}
// use empty string as a default condition value
var cmd = new CreateFragmentConditionCommand(entityType, tableColumn, null, String.Empty);
// set up our post event to fix up the view model
cmd.PostInvokeEvent += (o, eventsArgs) =>
{
var cond = cmd.CreatedCondition;
Debug.Assert(cond != null, "cmd failed to create Condition");
// fix up our view model
ModelItem = cond;
Parent.AddChild(this);
};
try
{
// now make the change
var cp = new CommandProcessor(cpc, cmd);
cp.Invoke();
}
catch
{
ModelItem = null;
Parent.RemoveChild(this);
throw;
}
}