/// <summary>
/// Returns all context data objects (depth first)
/// </summary>
internal static IEnumerable <PipelineContextData> Traverse(
this PipelineContextData value,
Boolean omitKeys)
{
yield return(value);
if (value is ArrayContextData || value is DictionaryContextData)
{
var state = new TraversalState(null, value);
while (state != null)
{
if (state.MoveNext(omitKeys))
{
value = state.Current;
yield return(value);
if (value is ArrayContextData || value is DictionaryContextData)
{
state = new TraversalState(state, value);
}
}
else
{
state = state.Parent;
}
}
}
}
public TraversalState(
TraversalState parent,
PipelineContextData data)
{
Parent = parent;
m_data = data;
}
public DictionaryContextDataPair(
String key,
PipelineContextData value)
{
Key = key;
Value = value;
}
internal static void AddBytes(
this TemplateMemory memory,
PipelineContextData value,
Boolean traverse)
{
var bytes = CalculateBytes(memory, value, traverse);
memory.AddBytes(bytes);
}
public static NumberContextData AssertNumber(
this PipelineContextData value,
String objectDescription)
{
if (value is NumberContextData num)
{
return(num);
}
throw new ArgumentException($"Unexpected type '{value?.GetType().Name}' encountered while reading '{objectDescription}'. The type '{nameof(NumberContextData)}' was expected.");
}
public static BooleanContextData AssertBoolean(
this PipelineContextData value,
String objectDescription)
{
if (value is BooleanContextData boolValue)
{
return(boolValue);
}
throw new ArgumentException($"Unexpected type '{value?.GetType().Name}' encountered while reading '{objectDescription}'. The type '{nameof(BooleanContextData)}' was expected.");
}
public static CaseSensitiveDictionaryContextData AssertCaseSensitiveDictionary(
this PipelineContextData value,
String objectDescription)
{
if (value is CaseSensitiveDictionaryContextData dictionary)
{
return(dictionary);
}
throw new ArgumentException($"Unexpected type '{value?.GetType().Name}' encountered while reading '{objectDescription}'. The type '{nameof(CaseSensitiveDictionaryContextData)}' was expected.");
}
internal static TemplateToken ToTemplateToken(this PipelineContextData data)
{
if (data is null)
{
return(new NullToken(null, null, null));
}
switch (data.Type)
{
case PipelineContextDataType.Dictionary:
var dictionary = data.AssertDictionary("dictionary");
var mapping = new MappingToken(null, null, null);
if (dictionary.Count > 0)
{
foreach (var pair in dictionary)
{
var key = new StringToken(null, null, null, pair.Key);
var value = pair.Value.ToTemplateToken();
mapping.Add(key, value);
}
}
return(mapping);
case PipelineContextDataType.Array:
var array = data.AssertArray("array");
var sequence = new SequenceToken(null, null, null);
if (array.Count > 0)
{
foreach (var item in array)
{
sequence.Add(item.ToTemplateToken());
}
}
return(sequence);
case PipelineContextDataType.String:
var stringData = data as StringContextData;
return(new StringToken(null, null, null, stringData.Value));
case PipelineContextDataType.Boolean:
var booleanData = data as BooleanContextData;
return(new BooleanToken(null, null, null, booleanData.Value));
case PipelineContextDataType.Number:
var numberData = data as NumberContextData;
return(new NumberToken(null, null, null, numberData.Value));
default:
throw new NotSupportedException($"Unexpected {nameof(PipelineContextDataType)} type '{data.Type}'");
}
}
internal static JToken ToJToken(this PipelineContextData value)
{
JToken result;
if (value is StringContextData str)
{
result = str.Value ?? String.Empty;
}
else if (value is BooleanContextData booleanValue)
{
result = booleanValue.Value;
}
else if (value is NumberContextData num)
{
result = num.Value;
}
else if (value is ArrayContextData array)
{
var jarray = new JArray();
foreach (var item in array)
{
jarray.Add(item.ToJToken()); // Recurse
}
result = jarray;
}
else if (value is DictionaryContextData dictionary)
{
var jobject = new JObject();
foreach (var pair in dictionary)
{
var key = pair.Key ?? String.Empty;
var value2 = pair.Value.ToJToken(); // Recurse
if (value2 != null)
{
jobject[key] = value2;
}
}
result = jobject;
}
else
{
throw new InvalidOperationException("Internal error reading the template. Expected a string, an array, or a dictionary");
}
return(result);
}
internal static Int32 CalculateBytes(
this TemplateMemory memory,
PipelineContextData value,
Boolean traverse)
{
var enumerable = traverse ? value.Traverse() : new[] { value } as IEnumerable <PipelineContextData>;
var result = 0;
foreach (var item in enumerable)
{
// This measurement doesn't have to be perfect
// https://codeblog.jonskeet.uk/2011/04/05/of-memory-and-strings/
switch (item?.Type)
{
case PipelineContextDataType.String:
var str = item.AssertString("string").Value;
checked
{
result += TemplateMemory.MinObjectSize + TemplateMemory.StringBaseOverhead + ((str?.Length ?? 0) * sizeof(Char));
}
break;
case PipelineContextDataType.Array:
case PipelineContextDataType.Dictionary:
case PipelineContextDataType.Boolean:
case PipelineContextDataType.Number:
// Min object size is good enough. Allows for base + a few fields.
checked
{
result += TemplateMemory.MinObjectSize;
}
break;
case null:
checked
{
result += IntPtr.Size;
}
break;
default:
throw new NotSupportedException($"Unexpected pipeline context data type '{item.Type}'");
}
}
return(result);
}
/// <summary>
/// Returns all context data objects (depth first)
/// </summary>
internal static IEnumerable <PipelineContextData> Traverse(this PipelineContextData value)
{
return(Traverse(value, omitKeys: false));
}