public JsonNodeInfo VisitNode(JObject node, MappingContext mappingContext, NodeContext nodeContext) {
var result = new JsonNodeInfo();
var idProp = node.Property("id");
var modelsProp = node.Property("models");
if (idProp != null && modelsProp != null) {
node.Add("modelLinks", modelsProp.Value);
modelsProp.Value = new JArray();
result.ServerTypeNameInfo = new TypeNameInfo("Make", "");
return result;
}
var makeProp = node.Property("make");
if (idProp != null && makeProp != null) {
node.Add("makeLink", makeProp.Value);
makeProp.Value = null;
var catsProp = node.Property("categories");
if (catsProp != null) {
var styleProps = catsProp["Vehicle Style"];
var styles = styleProps.Select(t => t.Value<String>()).ToAggregateString(", ");
node.Add("vehicleStyles", new JValue(styles));
}
result.ServerTypeNameInfo = new TypeNameInfo("Model", "");
return result;
}
return result;
//// Model parser
//else if (node.id && node.makeId) {
// // move 'node.make' link so 'make' can be null reference
// node.makeLink = node.make;
// node.make = null;
// // flatten styles and sizes as comma-separated strings
// var styles = node.categories && node.categories["Vehicle Style"];
// node.vehicleStyles = styles && styles.join(", ");
// var sizes = node.categories && node.categories["Vehicle Size"];
// node.vehicleSizes = sizes && sizes.join(", ");
// return { entityType: "Model" };
//}
}
public JsonNodeInfo VisitNode(NodeContext nodeContext)
{
return(JsonResultsAdapter.VisitNode(nodeContext.Node, this, nodeContext));
}
private void ParseObject(NodeContext nodeContext, EntityAspect targetAspect)
{
// backingStore will be null if not allowed to overwrite the entity.
var backingStore = (targetAspect == null) ? null : targetAspect.BackingStore;
var dict = (IDictionary <String, JToken>)nodeContext.Node;
var structuralType = nodeContext.StructuralType;
// needs to be the current namingConvention
var nc = _mappingContext.EntityManager.MetadataStore.NamingConvention;
dict.ForEach(kvp => {
var key = nc.ServerPropertyNameToClient(kvp.Key, structuralType);
var prop = structuralType.GetProperty(key);
if (prop != null)
{
if (prop.IsDataProperty)
{
if (backingStore != null)
{
var dp = (DataProperty)prop;
if (dp.IsComplexProperty)
{
var newCo = (IComplexObject)kvp.Value.ToObject(dp.ClrType);
var co = (IComplexObject)backingStore[key];
var coBacking = co.ComplexAspect.BackingStore;
newCo.ComplexAspect.BackingStore.ForEach(kvp2 => {
coBacking[kvp2.Key] = kvp2.Value;
});
}
else
{
var val = kvp.Value;
if (val.Type == JTokenType.Null && dp.ClrType != typeof(String) && !TypeFns.IsNullableType(dp.ClrType))
{
// this can only happen if the client is nonnullable but the server is nullable.
backingStore[key] = dp.DefaultValue;
}
else if (dp.IsEnumType || (dp.DataType.ClrType == typeof(TimeSpan)))
{
backingStore[key] = val.ToObject(dp.ClrType, _customSerializer);
}
else
{
backingStore[key] = val.ToObject(dp.ClrType);
}
}
}
}
else
{
// prop is a ComplexObject
var np = (NavigationProperty)prop;
if (kvp.Value.HasValues)
{
NodeContext newContext;
if (np.IsScalar)
{
var nestedOb = (JObject)kvp.Value;
newContext = new NodeContext()
{
Node = nestedOb, ObjectType = prop.ClrType, StructuralProperty = np
};
var entity = (IEntity)CreateAndPopulate(newContext);
if (backingStore != null)
{
backingStore[key] = entity;
}
}
else
{
var nestedArray = (JArray)kvp.Value;
var navSet = (INavigationSet)TypeFns.CreateGenericInstance(typeof(NavigationSet <>), prop.ClrType);
nestedArray.Cast <JObject>().ForEach(jo => {
newContext = new NodeContext()
{
Node = jo, ObjectType = prop.ClrType, StructuralProperty = np
};
var entity = (IEntity)CreateAndPopulate(newContext);
navSet.Add(entity);
});
// add to existing nav set if there is one otherwise just set it.
object tmp;
if (backingStore.TryGetValue(key, out tmp))
{
var backingNavSet = (INavigationSet)tmp;
navSet.Cast <IEntity>().ForEach(e => backingNavSet.Add(e));
}
else
{
navSet.NavigationProperty = np;
navSet.ParentEntity = targetAspect.Entity;
backingStore[key] = navSet;
}
}
}
else
{
// do nothing
//if (!np.IsScalar) {
// return TypeFns.ConstructGenericInstance(typeof(NavigationSet<>), prop.ClrType);
//} else {
// return null;
//}
}
}
}
else
{
if (backingStore != null)
{
backingStore[key] = kvp.Value.ToObject <Object>();
}
}
});
}
protected virtual Object CreateAndPopulate(NodeContext nodeContext)
{
var node = nodeContext.Node;
var nodeInfo = _mappingContext.VisitNode(nodeContext);
if (nodeInfo.Ignore)
{
return(null);
}
node = nodeInfo.Node ?? node;
if (nodeInfo.NodeRefId != null)
{
return(_mappingContext.RefMap[nodeInfo.NodeRefId]);
}
var metadataStore = _mappingContext.MetadataStore;
EntityType entityType;
Type objectType;
if (nodeInfo.ServerTypeNameInfo != null)
{
var clientEntityTypeName = nodeInfo.ServerTypeNameInfo.ToClient(metadataStore).StructuralTypeName;
entityType = metadataStore.GetEntityType(clientEntityTypeName);
objectType = entityType.ClrType;
if (!nodeContext.ObjectType.IsAssignableFrom(objectType))
{
throw new Exception("Unable to convert returned type: " + objectType.Name + " into type: " +
nodeContext.ObjectType.Name);
}
nodeContext.ObjectType = objectType;
}
else
{
objectType = nodeContext.ObjectType;
entityType = metadataStore.GetEntityType(objectType);
}
// an entity type
nodeContext.StructuralType = entityType;
var keyValues = entityType.KeyProperties
.Select(p => node[p.NameOnServer].ToObject(p.ClrType))
.ToArray();
var entityKey = EntityKey.Create(entityType, keyValues);
var entity = _mappingContext.EntityManager.GetEntityByKey(entityKey);
if (entity == null)
{
entity = (IEntity)Activator.CreateInstance(objectType);
entity.EntityAspect.EntityType = entityType;
}
// must be called before populate
if (nodeInfo.NodeId != null)
{
_mappingContext.RefMap[nodeInfo.NodeId] = entity;
}
_mappingContext.Entities.Add(entity);
return(PopulateEntity(nodeContext, entity));
}
public JsonNodeInfo VisitNode(JObject node, MappingContext mappingContext, NodeContext nodeContext) {
var result = new JsonNodeInfo();
JToken refToken;
if (node.TryGetValue("$ref", out refToken)) {
result.NodeRefId = refToken.Value<String>();
return result;
}
JToken idToken;
if (node.TryGetValue("$id", out idToken)) {
result.NodeId = idToken.Value<String>();
}
JToken typeToken;
if (node.TryGetValue("$type", out typeToken)) {
var clrTypeName = typeToken.Value<String>();
result.ServerTypeNameInfo = TypeNameInfo.FromClrTypeName(clrTypeName);
}
return result;
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) {
if (reader.TokenType != JsonToken.Null) {
// Load JObject from stream
var node = JObject.Load(reader);
var nodeContext = new NodeContext { Node = node, ObjectType = objectType };
// Create target object based on JObject
var target = CreateAndPopulate( nodeContext);
return target;
} else {
return null;
}
}
public JsonNodeInfo VisitNode(NodeContext nodeContext) {
return JsonResultsAdapter.VisitNode(nodeContext.Node, this, nodeContext);
}
private void ParseObject(NodeContext nodeContext, EntityAspect targetAspect) {
// backingStore will be null if not allowed to overwrite the entity.
var backingStore = (targetAspect == null) ? null : targetAspect.BackingStore;
var dict = (IDictionary<String, JToken>) nodeContext.Node;
var structuralType = nodeContext.StructuralType;
// needs to be the current namingConvention
var nc = _mappingContext.EntityManager.MetadataStore.NamingConvention;
dict.ForEach(kvp => {
var key = nc.ServerPropertyNameToClient(kvp.Key, structuralType);
var prop = structuralType.GetProperty(key);
if (prop != null) {
if (prop.IsDataProperty) {
if (backingStore != null) {
var dp = (DataProperty)prop;
if (dp.IsComplexProperty) {
var newCo = (IComplexObject) kvp.Value.ToObject(dp.ClrType);
var co = (IComplexObject)backingStore[key];
var coBacking = co.ComplexAspect.BackingStore;
newCo.ComplexAspect.BackingStore.ForEach(kvp2 => {
coBacking[kvp2.Key] = kvp2.Value;
});
} else {
var val = kvp.Value;
if (val.Type == JTokenType.Null && dp.ClrType != typeof(String) && !TypeFns.IsNullableType(dp.ClrType)) {
// this can only happen if the client is nonnullable but the server is nullable.
backingStore[key] = dp.DefaultValue;
} else if (dp.IsEnumType || (dp.DataType.ClrType == typeof (TimeSpan))) {
backingStore[key] = val.ToObject(dp.ClrType, _customSerializer);
} else {
backingStore[key] = val.ToObject(dp.ClrType);
}
}
}
} else {
// prop is a ComplexObject
var np = (NavigationProperty)prop;
if (kvp.Value.HasValues) {
NodeContext newContext;
if (np.IsScalar) {
var nestedOb = (JObject)kvp.Value;
newContext = new NodeContext() { Node = nestedOb, ObjectType = prop.ClrType, StructuralProperty = np};
var entity = (IEntity)CreateAndPopulate(newContext);
if (backingStore != null) backingStore[key] = entity;
} else {
var nestedArray = (JArray)kvp.Value;
var navSet = (INavigationSet) TypeFns.CreateGenericInstance(typeof(NavigationSet<>), prop.ClrType);
nestedArray.Cast<JObject>().ForEach(jo => {
newContext = new NodeContext() { Node=jo, ObjectType = prop.ClrType, StructuralProperty = np};
var entity = (IEntity)CreateAndPopulate(newContext);
navSet.Add(entity);
});
// add to existing nav set if there is one otherwise just set it.
object tmp;
if (backingStore.TryGetValue(key, out tmp)) {
var backingNavSet = (INavigationSet) tmp;
navSet.Cast<IEntity>().ForEach(e => backingNavSet.Add(e));
} else {
navSet.NavigationProperty = np;
navSet.ParentEntity = targetAspect.Entity;
backingStore[key] = navSet;
}
}
} else {
// do nothing
//if (!np.IsScalar) {
// return TypeFns.ConstructGenericInstance(typeof(NavigationSet<>), prop.ClrType);
//} else {
// return null;
//}
}
}
} else {
if (backingStore != null) backingStore[key] = kvp.Value.ToObject<Object>();
}
});
}
protected virtual Object PopulateEntity(NodeContext nodeContext, IEntity entity) {
var aspect = entity.EntityAspect;
if (aspect.EntityManager == null) {
// new to this entityManager
ParseObject(nodeContext, aspect);
aspect.Initialize();
// TODO: This is a nit. Wierd case where a save adds a new entity will show up with
// a AttachOnQuery operation instead of AttachOnSave
_mappingContext.EntityManager.AttachQueriedEntity(entity, (EntityType) nodeContext.StructuralType);
} else if (_mappingContext.MergeStrategy == MergeStrategy.OverwriteChanges || aspect.EntityState == EntityState.Unchanged) {
// overwrite existing entityManager
ParseObject(nodeContext, aspect);
aspect.Initialize();
aspect.OnEntityChanged(_mappingContext.LoadingOperation == LoadingOperation.Query ? EntityAction.MergeOnQuery : EntityAction.MergeOnSave);
} else {
// preserveChanges handling - we still want to handle expands.
ParseObject(nodeContext, null );
}
return entity;
}
protected virtual Object CreateAndPopulate(NodeContext nodeContext) {
var node = nodeContext.Node;
var nodeInfo = _mappingContext.VisitNode(nodeContext);
if (nodeInfo.Ignore) return null;
node = nodeInfo.Node ?? node;
if (nodeInfo.NodeRefId != null) {
return _mappingContext.RefMap[nodeInfo.NodeRefId];
}
var metadataStore = _mappingContext.MetadataStore;
EntityType entityType;
Type objectType;
if (nodeInfo.ServerTypeNameInfo != null) {
var clientEntityTypeName = nodeInfo.ServerTypeNameInfo.ToClient(metadataStore).StructuralTypeName;
entityType = metadataStore.GetEntityType(clientEntityTypeName);
objectType = entityType.ClrType;
if (!nodeContext.ObjectType.IsAssignableFrom(objectType)) {
throw new Exception("Unable to convert returned type: " + objectType.Name + " into type: " +
nodeContext.ObjectType.Name);
}
nodeContext.ObjectType = objectType;
}
else {
objectType = nodeContext.ObjectType;
entityType = metadataStore.GetEntityType(objectType);
}
// an entity type
nodeContext.StructuralType = entityType;
var keyValues = entityType.KeyProperties
.Select(p => node[p.NameOnServer].ToObject(p.ClrType))
.ToArray();
var entityKey = EntityKey.Create(entityType, keyValues);
var entity = _mappingContext.EntityManager.GetEntityByKey(entityKey);
if (entity == null) {
entity = (IEntity) Activator.CreateInstance(objectType);
entity.EntityAspect.EntityType = entityType;
}
// must be called before populate
if (nodeInfo.NodeId != null) {
_mappingContext.RefMap[nodeInfo.NodeId] = entity;
}
_mappingContext.Entities.Add(entity);
return PopulateEntity(nodeContext, entity);
}
