public CoercionThriftCodec(IThriftCodec <T> codec, TypeCoercion typeCoercion)
{
Guard.ArgumentNotNull(codec, nameof(codec));
Guard.ArgumentNotNull(typeCoercion, nameof(typeCoercion));
this._codec = codec;
this._typeCoercion = typeCoercion;
this.Type = typeCoercion.ThriftType;
}
public Term Visit(TypeCoercion typeCoercion)
{
if (_args.Count != 1)
{
throw new ExprArgException();
}
//type coercions are only relevant for the type inference
return(_args[0]);
}
public IEnumerable <string> Transform(ExpressionNode item)
{
_EncounteredOutputStyleBlock = true;
if (!(ShouldRender && _EncounteredOutputStyleBlock))
{
yield break;
}
if (item.IfClause != null)
{
var ifResult = Environment.Evaluation.EvaluateDynamic(item.IfClause, ExpressionParserTransformer);
if (TypeCoercion.GetTruthy(ifResult) == false)
{
if (item.ElseClause != null)
{
foreach (var subItem in item.ElseClause.Transform(this))
{
yield return(subItem);
}
}
yield break;
}
}
var result = Environment.Evaluation.EvaluateDynamic(item.ExpressionParserNode, ExpressionParserTransformer);
switch (result)
{
case ExpressionParser.Void _:
yield break;
case ASTNode astNode:
foreach (var output in astNode.Transform(this))
{
yield return(output);
}
yield break;
default:
yield return(JinjaCustomStringProvider.Instance.ToString(result));
yield break;
}
}
public IEnumerable <string> Transform(IfNode item)
{
if (ShouldRender == false)
{
yield break;
}
foreach (var condition in item.Conditions)
{
var result = Environment.Evaluation.EvaluateDynamic(condition.Expression.ExpressionParserNode, ExpressionParserTransformer);
var boolResult = TypeCoercion.GetTruthy(result);
if (boolResult)
{
_EncounteredOutputStyleBlock = true;
foreach (var output in condition.Transform(this))
{
yield return(output);
}
yield break;
}
}
}
internal object?Evaluate(IDictionary <string, object?> variables)
{
var typedArguments = Parameters.Select(param =>
{
if (variables.TryGetValue(param.Name, out var paramValue) == false)
{
throw new NotImplementedException();
}
if (TypeCoercion.CanCast(paramValue?.GetType() ?? typeof(object), param.Type) == false)
{
throw new NotImplementedException();
}
return(Convert.ChangeType(paramValue, param.Type, CultureInfo.InvariantCulture));
}).ToArray();
var invokeMethod = Delegate.GetType().GetMethod("Invoke", ParameterTypes);
if (ReturnType == typeof(void))
{
invokeMethod.Invoke(Delegate, typedArguments);
return(Void.Instance);
}
return(invokeMethod.Invoke(Delegate, typedArguments));
}
public IEnumerable <string> Transform(ForNode item)
{
_EncounteredOutputStyleBlock = true;
if (!(ShouldRender && _EncounteredOutputStyleBlock))
{
yield break;
}
object?evalObj;
if (item.Expression != null)
{
evalObj = Environment.Evaluation.EvaluateDynamic(item.Expression.Expression, Scopes);
}
else
{
evalObj = item.AlreadyEvaluatedObject;
}
Func <object?[], object?> loopFunction = args =>
{
if (args?.Length != 1)
{
throw new NotImplementedException();
}
return(new ForNode(item.PrimaryBlock, item.ElseBlock, item.VariableNames,
args[0], item.Filter, item.Recursive,
item.EndParsingNode, item.WhiteSpaceControl));
};
var arr = CollectionEx.ToArray(evalObj) ?? Array.Empty <object>();
if (item.Filter != null)
{
var filtered = new List <object?>();
foreach (var arrItem in arr)
{
var unpacked = ReflectionHelpers.Unpack(arrItem, item.VariableNames.Length);
Scopes.Push($"ForNode | Filter: {item.Filter} Item: {arrItem}");
for (var i = 0; i < unpacked.Length; ++i)
{
Scopes.Current.DefineAndSetVariable(item.VariableNames[i], unpacked[i]);
}
var result = Environment.Evaluation.EvaluateDynamic(item.Filter.Expression, Scopes);
Scopes.Pop($"ForNode | Filter: {item.Filter} Item: {arrItem}");
if (TypeCoercion.GetTruthy(result))
{
filtered.Add(arrItem);
}
}
arr = filtered.ToArray();
}
if (arr.Length == 0 && item.ElseBlock != null)
{
foreach (var output in item.ElseBlock.Transform(this))
{
yield return(output);
}
yield break;
}
var depth = 0;
if (Scopes.Current.TryGetVariable <LoopInfo>("loop", out var previousLoopInfo) && previousLoopInfo != null)
{
depth = previousLoopInfo.depth0 + 1;
}
var loopInfo = new LoopInfo(arr, loopFunction, depth);
for (var index = 0; index < arr.Length; ++index)
{
loopInfo.index0 = index;
var arrItem = arr[index];
var unpacked = ReflectionHelpers.Unpack(arrItem, item.VariableNames.Length);
Scopes.Push($"ForNode: {item.Expression} Item: {arrItem}");
for (var i = 0; i < unpacked.Length; ++i)
{
Scopes.Current.DefineAndSetVariable(item.VariableNames[i], unpacked[i]);
}
Scopes.Current.DefineAndSetVariable("loop", loopInfo);
foreach (var output in item.PrimaryBlock.Transform(this))
{
yield return(output);
}
Scopes.Pop($"ForNode: {item.Expression} Item: {arrItem}");
}
yield break;
}
public IThriftCodec Load(ThriftType type)
{
try
{
// When we need to load a codec for a type the first time, we push it on the
// thread-local stack before starting the load, and pop it off afterwards,
// so that we can detect recursive loads.
_stack.Value.Push(type);
switch (type.ProtocolType)
{
case ThriftProtocolType.Struct:
{
return(_factory.GenerateThriftTypeCodec(this, type.StructMetadata));
}
case ThriftProtocolType.Map:
{
var codecType = typeof(MapThriftCodec <,>).MakeGenericType(type.KeyTypeReference.CSharpType, type.ValueTypeReference.CSharpType);
return((IThriftCodec)Activator.CreateInstance(codecType, type, GetElementCodec(type.KeyTypeReference), GetElementCodec(type.ValueTypeReference)));
}
case ThriftProtocolType.Set:
{
var codecType = typeof(SetThriftCodec <>).MakeGenericType(type.ValueTypeReference.CSharpType);
return((IThriftCodec)Activator.CreateInstance(codecType, type, GetElementCodec(type.ValueTypeReference)));
}
case ThriftProtocolType.List:
{
var codecType = typeof(ListThriftCodec <>).MakeGenericType(type.ValueTypeReference.CSharpType);
return((IThriftCodec)Activator.CreateInstance(codecType, type, GetElementCodec(type.ValueTypeReference)));
}
case ThriftProtocolType.Enum:
{
var codecType = typeof(EnumThriftCodec <>).MakeGenericType(type.EnumMetadata.EnumType);
return((IThriftCodec)Activator.CreateInstance(codecType, type));
}
default:
if (type.IsCoerced)
{
var codec = GetCodec(type.UncoercedType);
TypeCoercion coercion = this.Catalog.GetDefaultCoercion(type.CSharpType);
var coercionThriftCodecType = typeof(CoercionThriftCodec <>).MakeGenericType(type.UncoercedType.CSharpType);
return((IThriftCodec)Activator.CreateInstance(coercionThriftCodecType, codec, coercion));
}
else
{
return(GetCodec(type.UncoercedType));
}
throw new ThriftyException("Unsupported Thrift type " + type);
}
}
finally
{
if (_stack.Value.Count > 0)
{
ThriftType top = _stack.Value.Pop();
if (!type.Equals(top))
{
throw new ThriftyException(
$"ThriftCatalog circularity detection stack is corrupt: expected {type}, but got {top}");
}
}
}
}
