public static List <NavigationProperty> GetNavigationProperties <T>(this DbEntityEntry <T> entity, DbContext context) where T : class
{
List <System.Reflection.PropertyInfo> properties = new List <System.Reflection.PropertyInfo>();
//Get the entity type
Type entityType = entity.GetType();
//Get the System.Data.Entity.Core.Metadata.Edm.EntityType
//associated with the entity.
MetadataWorkspace workspace = ((IObjectContextAdapter)context).ObjectContext.MetadataWorkspace;
ObjectItemCollection itemCollection = (ObjectItemCollection)(workspace.GetItemCollection(DataSpace.OSpace));
EntityType etype = itemCollection.OfType <EntityType>().Single(e => itemCollection.GetClrType(e) == typeof(T));
return(etype.NavigationProperties.ToList());
}
/// <summary>
/// Generates metadata for given item collection.
/// Fetches CLR models from object item collection.
/// </summary>
/// <param name="metadataWorkspace">The metadata workspace.</param>
/// <param name="itemCollection">The item collection.</param>
/// <param name="objectItemCollection">The object item collection.</param>
/// <param name="assembly">The assembly.</param>
/// <param name="connectionString">The connection string.</param>
/// <returns></returns>
/// <exception cref="BeetleException">Cannot load mapping information.</exception>
public static Metadata Generate(MetadataWorkspace metadataWorkspace, ItemCollection itemCollection,
ObjectItemCollection objectItemCollection, Assembly assembly, string connectionString) {
XDocument mappingXml = null;
XNamespace mappingNs = null;
try {
var csResourceMatch = Regex.Match(connectionString, @"res:*/(.*?\.msl)");
if (csResourceMatch.Success) {
var csResourceIndex = csResourceMatch.Value.LastIndexOf('/');
if (csResourceIndex >= 0) {
var csResource = csResourceMatch.Value.Substring(csResourceIndex + 1);
if (!string.IsNullOrEmpty(csResource)) {
using (var stream = assembly.GetManifestResourceStream(csResource)) {
if (stream != null) {
using (var reader = new StreamReader(stream)) {
mappingXml = XDocument.Load(reader);
// ReSharper disable once PossibleNullReferenceException
mappingNs = mappingXml.Root.GetDefaultNamespace();
}
}
}
}
}
}
}
catch {
mappingXml = null;
}
var container = itemCollection.OfType<EntityContainer>().FirstOrDefault();
// collect necessary entity information in one collection.
var entityResources = new List<EntityResource>();
foreach (var entityType in itemCollection.OfType<EntityType>().OrderBy(et => et.Name)) {
var et = entityType;
var entitySet = GetEntitySet(container, et);
IEnumerable<KeyValuePair<string, string>> propertyMappings = null;
XElement entityMap = null;
if (mappingXml != null) {
entityMap = mappingXml
.Descendants(mappingNs.GetName("EntitySetMapping"))
.First(esm => esm.Attribute("Name").Value == entitySet.Name)
.Descendants(mappingNs.GetName("EntityTypeMapping"))
.First(mf => {
var typeName = mf.Attribute("TypeName").Value;
return typeName == et.FullName || typeName == string.Format("IsTypeOf({0})", et.FullName);
})
.Descendants(mappingNs.GetName("MappingFragment"))
.Single();
propertyMappings = entityMap.Descendants(mappingNs.GetName("ScalarProperty"))
.Select(sp => new KeyValuePair<string, string>(sp.Attribute("Name").Value, sp.Attribute("ColumnName").Value));
}
var complexProperties = et.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == et);
Dictionary<EdmProperty, IEnumerable<ColumnMapping>> complexMappings = null;
if (entityMap != null) {
complexMappings = new Dictionary<EdmProperty, IEnumerable<ColumnMapping>>();
foreach (var complexProperty in complexProperties) {
var complexMapping = entityMap
.Descendants(mappingNs.GetName("ComplexProperty"))
.First(cp => cp.Attribute("Name").Value == complexProperty.Name)
.Descendants(mappingNs.GetName("ScalarProperty"))
.Select(p => new ColumnMapping(p.Attribute("Name").Value, p.Attribute("ColumnName").Value));
complexMappings.Add(complexProperty, complexMapping);
}
}
var entityResource = new EntityResource {
Entity = et,
Type = et,
Name = et.Name,
EntitySet = entitySet,
SimpleProperties = et.Properties
.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == et)
.ToDictionary(p => propertyMappings == null ? p.Name : propertyMappings.First(pm => pm.Key == p.Name).Value, p => p),
NavigationProperties = et.NavigationProperties.Where(np => np.DeclaringType == et),
ComplexProperties = complexMappings,
ClrType = objectItemCollection.GetClrType(objectItemCollection.OfType<EntityType>().First(x => x.Name == et.Name)),
TableName = entityMap == null ? et.Name : entityMap.Attribute("StoreEntitySet").Value
};
entityResources.Add(entityResource);
}
foreach (var complexType in itemCollection.OfType<ComplexType>().OrderBy(i => i.Name)) {
var ct = complexType;
var simpleProperties = ct.Properties
.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == ct)
.ToDictionary(p => p.Name, p => p);
var entityResource = new EntityResource {
Type = ct,
Name = ct.Name,
SimpleProperties = simpleProperties,
ClrType = objectItemCollection.GetClrType(objectItemCollection.OfType<ComplexType>().First(x => x.Name == ct.Name))
};
entityResources.Add(entityResource);
}
var enumResources = new List<EnumResource>();
foreach (var enumType in itemCollection.OfType<EnumType>()) {
var oSpaceEnumType = objectItemCollection.OfType<EnumType>().First(x => x.Name == enumType.Name);
var enumClrType = objectItemCollection.GetClrType(oSpaceEnumType);
enumResources.Add(new EnumResource { EnumType = enumType, ClrType = enumClrType });
}
return Mapping(entityResources, enumResources, itemCollection, container);
}
public static Metadata Generate(MetadataWorkspace metadataWorkspace, ItemCollection itemCollection,
ObjectItemCollection objectItemCollection, Assembly assembly, string modelName = null)
{
var container = itemCollection.OfType <EntityContainer>().First();
XDocument mappingXml = null;
XNamespace mappingNs = null;
try {
if (modelName == null)
{
var schemaSource = container.MetadataProperties["SchemaSource"].Value.ToString();
modelName = Regex.Match(schemaSource, @"res://.*/(.*?)\.csdl").Groups[1].Value;
}
using (var stream = assembly.GetManifestResourceStream(modelName + ".msl")) {
if (stream != null)
{
using (var reader = new StreamReader(stream)) {
mappingXml = XDocument.Load(reader);
// ReSharper disable once PossibleNullReferenceException
mappingNs = mappingXml.Root.GetDefaultNamespace();
}
}
}
}
catch {
mappingXml = null;
}
// collect necessary entity information in one collection.
var entityResources = new List <EntityResource>();
foreach (var entityType in itemCollection.OfType <EFEntityType>().OrderBy(et => et.Name))
{
var et = entityType;
var entitySet = GetEntitySet(container, et);
IEnumerable <KeyValuePair <string, string> > propertyMappings = null;
XElement entityMap = null;
if (mappingXml != null)
{
entityMap = mappingXml
.Descendants(mappingNs.GetName("EntitySetMapping"))
.First(esm => esm.Attribute("Name")?.Value == entitySet.Name)
.Descendants(mappingNs.GetName("EntityTypeMapping"))
.First(mf => {
var typeName = mf.Attribute("TypeName")?.Value;
return(typeName == et.FullName || typeName == $"IsTypeOf({et.FullName})");
})
.Descendants(mappingNs.GetName("MappingFragment"))
.Single();
propertyMappings = entityMap.Descendants(mappingNs.GetName("ScalarProperty"))
.Select(sp => new KeyValuePair <string, string>(
sp.Attribute("Name")?.Value, sp.Attribute("ColumnName")?.Value)
);
}
var complexProperties = et.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == et);
Dictionary <EdmProperty, IEnumerable <ColumnMapping> > complexMappings = null;
if (entityMap != null)
{
complexMappings = new Dictionary <EdmProperty, IEnumerable <ColumnMapping> >();
foreach (var complexProperty in complexProperties)
{
var complexMapping = entityMap
.Descendants(mappingNs.GetName("ComplexProperty"))
.First(cp => cp.Attribute("Name")?.Value == complexProperty.Name)
.Descendants(mappingNs.GetName("ScalarProperty"))
.Select(p => new ColumnMapping(p.Attribute("Name")?.Value, p.Attribute("ColumnName")?.Value));
complexMappings.Add(complexProperty, complexMapping);
}
}
var entityResource = new EntityResource {
Entity = et,
Type = et,
Name = et.Name,
EntitySet = entitySet,
SimpleProperties = et.Properties
.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == et)
.ToDictionary(p => propertyMappings == null ? p.Name : propertyMappings.First(pm => pm.Key == p.Name).Value, p => p),
NavigationProperties = et.NavigationProperties.Where(np => np.DeclaringType == et),
ComplexProperties = complexMappings,
ClrType = objectItemCollection.GetClrType(objectItemCollection.OfType <EFEntityType>().First(x => x.Name == et.Name)),
TableName = entityMap?.Attribute("StoreEntitySet")?.Value ?? et.Name
};
entityResources.Add(entityResource);
}
foreach (var complexType in itemCollection.OfType <ComplexType>().OrderBy(i => i.Name))
{
var ct = complexType;
var simpleProperties = ct.Properties
.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == ct)
.ToDictionary(p => p.Name, p => p);
var entityResource = new EntityResource {
Type = ct,
Name = ct.Name,
SimpleProperties = simpleProperties,
ClrType = objectItemCollection.GetClrType(objectItemCollection.OfType <ComplexType>().First(x => x.Name == ct.Name))
};
entityResources.Add(entityResource);
}
var enumResources = new List <EnumResource>();
foreach (var enumType in itemCollection.OfType <EFEnumType>())
{
var oSpaceEnumType = objectItemCollection.OfType <EFEnumType>().First(x => x.Name == enumType.Name);
var enumClrType = objectItemCollection.GetClrType(oSpaceEnumType);
enumResources.Add(new EnumResource {
EnumType = enumType, ClrType = enumClrType
});
}
return(Mapping(entityResources, enumResources, itemCollection, container));
}
