public static JArray Expand(JObject original)
{
JsonLdProcessorContext activeContext = new JsonLdProcessorContext();
JToken token = InnerExpand(activeContext, null, original);
if (token == null)
{
return null;
}
if (token.Type == JTokenType.Array)
{
return (JArray)token;
}
JArray result = new JArray();
result.Add(token);
return result;
}
public void Expand(JsonLdProcessorContext activeContext)
{
IDictionary<string, TermDefinition> expanded = new Dictionary<string, TermDefinition>();
foreach (KeyValuePair<string, TermDefinition> prop in _props)
{
TermDefinition expandedTermDefinition = new TermDefinition(prop.Value);
if (expandedTermDefinition.Type != null)
{
expandedTermDefinition.Type = activeContext.ExpandValue(ExpandValue(expandedTermDefinition.Type));
}
if (expandedTermDefinition.Id != null)
{
expandedTermDefinition.Id = activeContext.ExpandValue(ExpandValue(expandedTermDefinition.Id));
}
expanded.Add(prop.Key, expandedTermDefinition);
}
_props = expanded;
}
private static JToken InnerExpand(JsonLdProcessorContext activeContext, TermDefinition activePropertyTermDefinition, JToken original)
{
switch (original.Type)
{
case JTokenType.Array:
{
JArray originalArray = (JArray)original;
JArray expanded = new JArray();
foreach (JToken property in originalArray)
{
expanded.Add(InnerExpand(activeContext, activePropertyTermDefinition, property));
}
return expanded;
}
case JTokenType.Object:
{
JObject originalObj = (JObject)original;
JToken expanded;
activeContext.Push(originalObj);
JToken graph;
if (originalObj.TryGetValue("@graph", out graph))
{
expanded = InnerExpand(activeContext, null, graph);
JToken id;
if (originalObj.TryGetValue("@id", out id))
{
JObject namedGraph = new JObject();
namedGraph.Add("@graph", expanded);
namedGraph.Add("@id", id);
//TODO: other graph level properties
expanded = namedGraph;
}
}
else
{
JObject obj = new JObject();
foreach (JProperty property in originalObj.Properties())
{
string name = activeContext.Alias(property.Name);
switch (name)
{
case "@id":
obj.Add("@id", property.Value);
break;
case "@context":
break;
case "@type":
{
string expandedName = "@type";
JToken expandedValue = InnerExpand(activeContext, null, property.Value);
AddToValueArray(obj, expandedName, expandedValue);
break;
}
default:
{
TermDefinition termDefinition;
if (activeContext.TryLookUp(name, out termDefinition))
{
if (termDefinition.Id == null)
{
TermDefinition prefixTermDefinition;
if (activeContext.TryLookUpPrefix(name, out prefixTermDefinition))
{
termDefinition.Id = prefixTermDefinition.Id;
}
}
JToken expandedValue = InnerExpand(activeContext, termDefinition, property.Value);
AddToObject(obj, termDefinition, expandedValue);
}
else if (activeContext.TryLookUpPrefix(name, out termDefinition))
{
JToken expandedValue = InnerExpand(activeContext, termDefinition, property.Value);
AddToObject(obj, termDefinition, expandedValue);
}
else
{
termDefinition = new TermDefinition(name);
JToken expandedValue = InnerExpand(activeContext, termDefinition, property.Value);
AddToObject(obj, termDefinition, expandedValue);
}
}
break;
}
}
expanded = obj;
}
activeContext.Pop();
return expanded;
}
default:
{
if (activePropertyTermDefinition == null)
{
string expandedValue = activeContext.ExpandValue(original.ToString());
return new JValue(expandedValue);
}
else
{
JObject expanded = new JObject();
if (activePropertyTermDefinition.Type == "@id")
{
string expandedValue = activeContext.ExpandValue(original.ToString());
expanded.Add("@id", expandedValue);
}
else if (activePropertyTermDefinition.Type == "@vocab")
{
expanded.Add("@id", original);
}
else
{
expanded.Add("@value", original);
if (activePropertyTermDefinition.Type != null)
{
expanded.Add("@type", activePropertyTermDefinition.Type);
}
if (activePropertyTermDefinition.Language != null)
{
expanded.Add("@language", activePropertyTermDefinition.Language);
}
}
return expanded;
}
}
}
}
