public IActionResult EvaluateExpression([FromBody, SwaggerRequestBody("The request that contains the expression and variables")] ExpressionRequest request)
{
if (!this.ModelState.IsValid)
{
this.logger.LogError("This model doesn't look right to me!");
throw new ArgumentException("Your request body wasn't proper! ");
}
this.logger.LogInformation($"All looks good. Let's start parsing: {request.Expression}.");
MathExpressionBuilder builder = new MathExpressionBuilder(request.Expression);
IMathExpression parsedExpression = builder.GenerateExpression();
this.logger.LogDebug("Yup. Looks like a legit expression.");
foreach (var variable in request.VariableEntries)
{
builder.SetVariable(variable.Name, variable.Value.ToString());
this.logger.LogDebug("Setting variable {0} with {1}", variable.Name, variable.Value);
}
ExpressionResponse response = new ExpressionResponse
{
AdjustedExpression = parsedExpression.ToString(),
Expression = request.Expression,
VariableEntries = request.VariableEntries,
ValueGenerated = parsedExpression.EvaluateExpression()
};
return(this.Ok(response));
}
public async Task <ExpressionResponse> CalculateResult(string[] expressions, int?precision = 0)
{
try
{
HttpResponseMessage response = null;
ExpressionRequest reqBody = new ExpressionRequest()
{
expr = expressions, precision = precision.HasValue ? precision.Value : 0
};
var bodyJson = JsonConvert.SerializeObject(reqBody);
response = await PostHttpRequest(bodyJson);
if (response != null)
{
response.EnsureSuccessStatusCode();
var responseResult = response.Content.ReadAsStringAsync();
var calculatedResponse = JsonConvert.DeserializeObject <ExpressionResponse>(responseResult.Result.ToString());
return(calculatedResponse);
}
return(null);
}
catch (Exception ex)
{
return(new ExpressionResponse()
{
result = null, error = $"Error occurred while calling API to evaluate expression - {ex.Message}"
});
}
}
public Expression CreateMapExpression(ExpressionRequest request,
Expression instanceParameter, Internal.IDictionary <ExpressionRequest, int> typePairCount)
{
var typeMap = ConfigurationProvider.ResolveTypeMap(request.SourceType,
request.DestinationType);
if (typeMap == null)
{
const string MessageFormat = "Missing map from {0} to {1}. Create using Mapper.CreateMap<{0}, {1}>.";
var message = string.Format(MessageFormat, request.SourceType.Name, request.DestinationType.Name);
throw new InvalidOperationException(message);
}
var bindings = CreateMemberBindings(request, typeMap, instanceParameter, typePairCount);
var parameterReplacer = new ParameterReplacementVisitor(instanceParameter);
var visitor = new NewFinderVisitor();
var constructorExpression = typeMap.DestinationConstructorExpression(instanceParameter);
visitor.Visit(parameterReplacer.Visit(constructorExpression));
var expression = Expression.MemberInit(
visitor.NewExpression,
bindings.ToArray()
);
return(expression);
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount, LetPropertyMaps letPropertyMaps)
{
var destinationListType = ElementTypeHelper.GetElementType(propertyMap.DestinationType);
var sourceListType = ElementTypeHelper.GetElementType(propertyMap.SourceType);
var expression = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand, request);
var transformedExpressions = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount, letPropertyMaps.New());
if (transformedExpressions == null)
{
return(null);
}
expression = transformedExpressions.Aggregate(expression, Select);
}
expression =
propertyMap.DestinationType.IsArray
? Expression.Call(typeof(Enumerable), nameof(Enumerable.ToArray), new[] { destinationListType }, expression)
: propertyMap.DestinationType.IsCollectionType()
? Expression.Call(typeof(Enumerable), nameof(Enumerable.ToList), new[] { destinationListType }, expression)
: expression;
return(Expression.Bind(propertyMap.DestinationMember, expression));
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary<ExpressionRequest, int> typePairCount)
{
var destinationListType = TypeHelper.GetElementType(propertyMap.DestinationPropertyType);
var sourceListType = TypeHelper.GetElementType(propertyMap.SourceType);
var expression = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand);
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount);
if(transformedExpression == null)
{
return null;
}
expression = Expression.Call(typeof (Enumerable), "Select", new[] {sourceListType, destinationListType}, result.ResolutionExpression, transformedExpression);
}
expression = Expression.Call(typeof(Enumerable), propertyMap.DestinationPropertyType.IsArray ? "ToArray" : "ToList", new[] { destinationListType }, expression);
if(configuration.Configuration.AllowNullCollections) {
expression = Expression.Condition(
Expression.NotEqual(
Expression.TypeAs(result.ResolutionExpression, typeof(object)),
Expression.Constant(null)),
expression,
Expression.Constant(null, propertyMap.DestinationPropertyType));
}
return Expression.Bind(propertyMap.DestinationProperty, expression);
}
private static MemberAssignment BindEnumerableExpression(IMappingEngine mappingEngine, PropertyMap propertyMap,
ExpressionRequest request, ExpressionResolutionResult result,
Internal.IDictionary<ExpressionRequest, int> typePairCount)
{
MemberAssignment bindExpression;
Type destinationListType = GetDestinationListTypeFor(propertyMap);
Type sourceListType = null;
// is list
if (result.Type.IsArray)
{
sourceListType = result.Type.GetElementType();
}
else
{
sourceListType = result.Type.GetGenericArguments().First();
}
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.IncludedMembers);
var selectExpression = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var transformedExpression = Extensions.CreateMapExpression(mappingEngine, listTypePair, typePairCount);
selectExpression = Expression.Call(
typeof (Enumerable),
"Select",
new[] {sourceListType, destinationListType},
result.ResolutionExpression,
transformedExpression);
}
if (typeof (IList<>).MakeGenericType(destinationListType)
.IsAssignableFrom(propertyMap.DestinationPropertyType)
||
typeof (ICollection<>).MakeGenericType(destinationListType)
.IsAssignableFrom(propertyMap.DestinationPropertyType))
{
// Call .ToList() on IEnumerable
var toListCallExpression = GetToListCallExpression(propertyMap, destinationListType, selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toListCallExpression);
}
else if (propertyMap.DestinationPropertyType.IsArray)
{
// Call .ToArray() on IEnumerable
MethodCallExpression toArrayCallExpression = Expression.Call(
typeof (Enumerable),
"ToArray",
new[] {destinationListType},
selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toArrayCallExpression);
}
else
{
// destination type implements ienumerable, but is not an ilist. allow deferred enumeration
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, selectExpression);
}
return bindExpression;
}
public LambdaExpression CreateMapExpression(ExpressionRequest request, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
// this is the input parameter of this expression with name <variableName>
var instanceParameter = Expression.Parameter(request.SourceType, "dto");
var total = CreateMapExpression(request, instanceParameter, typePairCount);
var delegateType = typeof(Func <,>).MakeGenericType(request.SourceType, request.DestinationType);
return(Expression.Lambda(delegateType, total, instanceParameter));
}
private static MemberAssignment BindEnumerableExpression(IMappingEngine mappingEngine, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, Internal.IDictionary <ExpressionRequest, int> typePairCount)
{
MemberAssignment bindExpression;
Type destinationListType = GetDestinationListTypeFor(propertyMap);
Type sourceListType = null;
// is list
if (result.Type.IsArray)
{
sourceListType = result.Type.GetElementType();
}
else
{
sourceListType = result.Type.GetGenericArguments().First();
}
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.IncludedMembers);
var selectExpression = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var transformedExpression = Extensions.CreateMapExpression(mappingEngine, listTypePair, typePairCount);
selectExpression = Expression.Call(
typeof(Enumerable),
"Select",
new[] { sourceListType, destinationListType },
result.ResolutionExpression,
transformedExpression);
}
if (typeof(IList <>).MakeGenericType(destinationListType).IsAssignableFrom(propertyMap.DestinationPropertyType) ||
typeof(ICollection <>).MakeGenericType(destinationListType).IsAssignableFrom(propertyMap.DestinationPropertyType))
{
// Call .ToList() on IEnumerable
var toListCallExpression = GetToListCallExpression(propertyMap, destinationListType, selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toListCallExpression);
}
else if (propertyMap.DestinationPropertyType.IsArray)
{
// Call .ToArray() on IEnumerable
MethodCallExpression toArrayCallExpression = Expression.Call(
typeof(Enumerable),
"ToArray",
new Type[] { destinationListType },
selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toArrayCallExpression);
}
else
{
// destination type implements ienumerable, but is not an ilist. allow deferred enumeration
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, selectExpression);
}
return(bindExpression);
}
public LambdaExpression CreateMapExpression(ExpressionRequest request, Internal.IDictionary <ExpressionRequest, int> typePairCount)
{
// this is the input parameter of this expression with name <variableName>
ParameterExpression instanceParameter = Expression.Parameter(request.SourceType, "dto");
var total = CreateMapExpression(request, instanceParameter, typePairCount);
return(Expression.Lambda(total, instanceParameter));
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
var destinationListType = GetDestinationListTypeFor(propertyMap);
var sourceListType = result.Type.IsArray ? result.Type.GetElementType() : result.Type.GetTypeInfo().GenericTypeArguments.First();
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand);
Expression exp = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount);
if (transformedExpression == null)
{
return(null);
}
exp = Expression.Call(
typeof(Enumerable),
"Select",
new[] { sourceListType, destinationListType },
result.ResolutionExpression,
transformedExpression);
}
if (typeof(IList <>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo())
||
typeof(ICollection <>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo()))
{
// Call .ToList() on IEnumerable
exp = GetToListCallExpression(propertyMap, destinationListType, exp);
}
else if (propertyMap.DestinationPropertyType.IsArray)
{
// Call .ToArray() on IEnumerable
exp = Expression.Call(
typeof(Enumerable),
"ToArray",
new[] { destinationListType },
exp);
}
if (configuration.AllowNullCollections)
{
exp = Expression.Condition(
Expression.NotEqual(
Expression.TypeAs(result.ResolutionExpression, typeof(object)),
Expression.Constant(null)),
exp,
Expression.Constant(null, propertyMap.DestinationPropertyType));
}
return(Expression.Bind(propertyMap.DestinationProperty.MemberInfo, exp));
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary<ExpressionRequest, int> typePairCount)
{
var destinationListType = GetDestinationListTypeFor(propertyMap);
var sourceListType = result.Type.IsArray ? result.Type.GetElementType() : result.Type.GetTypeInfo().GenericTypeArguments.First();
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand);
Expression exp = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount);
if(transformedExpression == null)
{
return null;
}
exp = Expression.Call(
typeof (Enumerable),
"Select",
new[] {sourceListType, destinationListType},
result.ResolutionExpression,
transformedExpression);
}
if (typeof (IList<>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo())
||
typeof (ICollection<>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo()))
{
// Call .ToList() on IEnumerable
exp = GetToListCallExpression(propertyMap, destinationListType, exp);
}
else if (propertyMap.DestinationPropertyType.IsArray)
{
// Call .ToArray() on IEnumerable
exp = Expression.Call(
typeof (Enumerable),
"ToArray",
new[] {destinationListType},
exp);
}
if(configuration.AllowNullCollections) {
exp = Expression.Condition(
Expression.NotEqual(
Expression.TypeAs(result.ResolutionExpression, typeof(object)),
Expression.Constant(null)),
exp,
Expression.Constant(null, propertyMap.DestinationPropertyType));
}
return Expression.Bind(propertyMap.DestinationProperty.MemberInfo, exp);
}
public Expression CreateMapExpression(ExpressionRequest request,
Expression instanceParameter, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
var typeMap = ConfigurationProvider.ResolveTypeMap(request.SourceType,
request.DestinationType);
if (typeMap == null)
{
const string MessageFormat = "Missing map from {0} to {1}. Create using Mapper.CreateMap<{0}, {1}>.";
var message = string.Format(MessageFormat, request.SourceType.Name, request.DestinationType.Name);
throw new InvalidOperationException(message);
}
var parameterReplacer = instanceParameter is ParameterExpression ? new ParameterReplacementVisitor(instanceParameter) : null;
var customProjection = typeMap.CustomProjection;
if (customProjection != null)
{
return(parameterReplacer == null ? customProjection.Body : parameterReplacer.Visit(customProjection.Body));
}
var bindings = new List <MemberBinding>();
var visitCount = typePairCount.AddOrUpdate(request, 0, (tp, i) => i + 1);
if (visitCount >= typeMap.MaxDepth)
{
if (ConfigurationProvider.AllowNullDestinationValues)
{
return(null);
}
}
else
{
bindings = CreateMemberBindings(request, typeMap, instanceParameter, typePairCount);
}
Expression constructorExpression = typeMap.DestinationConstructorExpression(instanceParameter);
if (parameterReplacer != null)
{
constructorExpression = parameterReplacer.Visit(constructorExpression);
}
var visitor = new NewFinderVisitor();
visitor.Visit(constructorExpression);
var expression = Expression.MemberInit(
visitor.NewExpression,
bindings.ToArray()
);
return(expression);
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
MemberAssignment bindExpression;
Type destinationListType = GetDestinationListTypeFor(propertyMap);
var sourceListType = result.Type.IsArray ? result.Type.GetElementType() : result.Type.GetTypeInfo().GenericTypeArguments.First();
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand);
var selectExpression = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount);
if (transformedExpression == null)
{
return(null);
}
selectExpression = Expression.Call(
typeof(Enumerable),
"Select",
new[] { sourceListType, destinationListType },
result.ResolutionExpression,
transformedExpression);
}
if (typeof(IList <>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo())
||
typeof(ICollection <>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo()))
{
// Call .ToList() on IEnumerable
var toListCallExpression = GetToListCallExpression(propertyMap, destinationListType, selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toListCallExpression);
}
else if (propertyMap.DestinationPropertyType.IsArray)
{
// Call .ToArray() on IEnumerable
MethodCallExpression toArrayCallExpression = Expression.Call(
typeof(Enumerable),
"ToArray",
new[] { destinationListType },
selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toArrayCallExpression);
}
else
{
// destination type implements ienumerable, but is not an ilist. allow deferred enumeration
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, selectExpression);
}
return(bindExpression);
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary<ExpressionRequest, int> typePairCount)
{
MemberAssignment bindExpression;
Type destinationListType = GetDestinationListTypeFor(propertyMap);
var sourceListType = result.Type.IsArray ? result.Type.GetElementType() : result.Type.GetTypeInfo().GenericTypeArguments.First();
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand);
var selectExpression = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount);
if(transformedExpression == null)
{
return null;
}
selectExpression = Expression.Call(
typeof (Enumerable),
"Select",
new[] {sourceListType, destinationListType},
result.ResolutionExpression,
transformedExpression);
}
if (typeof (IList<>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo())
||
typeof (ICollection<>).MakeGenericType(destinationListType)
.GetTypeInfo().IsAssignableFrom(propertyMap.DestinationPropertyType.GetTypeInfo()))
{
// Call .ToList() on IEnumerable
var toListCallExpression = GetToListCallExpression(propertyMap, destinationListType, selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toListCallExpression);
}
else if (propertyMap.DestinationPropertyType.IsArray)
{
// Call .ToArray() on IEnumerable
MethodCallExpression toArrayCallExpression = Expression.Call(
typeof (Enumerable),
"ToArray",
new[] {destinationListType},
selectExpression);
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, toArrayCallExpression);
}
else
{
// destination type implements ienumerable, but is not an ilist. allow deferred enumeration
bindExpression = Expression.Bind(propertyMap.DestinationProperty.MemberInfo, selectExpression);
}
return bindExpression;
}
private static MemberAssignment BindMappedTypeExpression(IMappingEngine mappingEngine, PropertyMap propertyMap,
ExpressionRequest request, ExpressionResolutionResult result, Internal.IDictionary<ExpressionRequest, int> typePairCount)
{
var transformedExpression = ((IMappingEngineRunner)mappingEngine).CreateMapExpression(request, result.ResolutionExpression, typePairCount);
// Handles null source property so it will not create an object with possible non-nullable propeerties
// which would result in an exception.
if (mappingEngine.ConfigurationProvider.MapNullSourceValuesAsNull)
{
var expressionNull = Expression.Constant(null, propertyMap.DestinationPropertyType);
transformedExpression =
Expression.Condition(Expression.NotEqual(result.ResolutionExpression, Expression.Constant(null)),
transformedExpression, expressionNull);
}
return Expression.Bind(propertyMap.DestinationProperty.MemberInfo, transformedExpression);
}
private static MemberAssignment BindMappedTypeExpression(IMappingEngine mappingEngine, PropertyMap propertyMap,
ExpressionRequest request, ExpressionResolutionResult result, Internal.IDictionary <ExpressionRequest, int> typePairCount)
{
var transformedExpression = ((IMappingEngineRunner)mappingEngine).CreateMapExpression(request, result.ResolutionExpression, typePairCount);
// Handles null source property so it will not create an object with possible non-nullable propeerties
// which would result in an exception.
if (mappingEngine.ConfigurationProvider.AllowNullDestinationValues)
{
var expressionNull = Expression.Constant(null, propertyMap.DestinationPropertyType);
transformedExpression =
Expression.Condition(Expression.NotEqual(result.ResolutionExpression, Expression.Constant(null)),
transformedExpression, expressionNull);
}
return(Expression.Bind(propertyMap.DestinationProperty.MemberInfo, transformedExpression));
}
private List <MemberBinding> CreateMemberBindings(ExpressionRequest request,
TypeMap typeMap,
Expression instanceParameter, Internal.IDictionary <ExpressionRequest, int> typePairCount)
{
var bindings = new List <MemberBinding>();
var visitCount = typePairCount.AddOrUpdate(request, 0, (tp, i) => i + 1);
if (visitCount >= typeMap.MaxDepth)
{
return(bindings);
}
foreach (var propertyMap in typeMap.GetPropertyMaps().Where(pm => pm.CanResolveValue()))
{
var result = ResolveExpression(propertyMap, request.SourceType, instanceParameter);
if (propertyMap.ExplicitExpansion &&
!request.MembersToExpand.Contains(propertyMap.DestinationProperty.MemberInfo))
{
continue;
}
var propertyTypeMap = ConfigurationProvider.ResolveTypeMap(result.Type,
propertyMap.DestinationPropertyType);
var propertyRequest = new ExpressionRequest(result.Type, propertyMap.DestinationPropertyType,
request.MembersToExpand);
var binder = Binders.FirstOrDefault(b => b.IsMatch(propertyMap, propertyTypeMap, result));
if (binder == null)
{
var message =
$"Unable to create a map expression from {propertyMap.SourceMember?.DeclaringType?.Name}.{propertyMap.SourceMember?.Name} ({result.Type}) to {propertyMap.DestinationProperty.MemberInfo.DeclaringType?.Name}.{propertyMap.DestinationProperty.Name} ({propertyMap.DestinationPropertyType})";
throw new AutoMapperMappingException(message);
}
var bindExpression = binder.Build(this, propertyMap, propertyTypeMap, propertyRequest, result,
typePairCount);
bindings.Add(bindExpression);
}
return(bindings);
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount, LetPropertyMaps letPropertyMaps)
{
var expression = result.ResolutionExpression;
if (propertyMap.DestinationPropertyType != expression.Type)
{
var destinationListType = ElementTypeHelper.GetElementType(propertyMap.DestinationPropertyType);
var sourceListType = ElementTypeHelper.GetElementType(propertyMap.SourceType);
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand, request);
var transformedExpressions = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount, letPropertyMaps.New());
if (transformedExpressions == null)
{
return(null);
}
expression = transformedExpressions.Aggregate(expression, (source, lambda) => Select(source, lambda));
}
return(Expression.Bind(propertyMap.DestinationProperty, expression));
}
private static MemberAssignment BindMappedTypeExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary<ExpressionRequest, int> typePairCount)
{
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(request, result.ResolutionExpression, typePairCount);
if(transformedExpression == null)
{
return null;
}
// Handles null source property so it will not create an object with possible non-nullable propeerties
// which would result in an exception.
if (propertyMap.TypeMap.Profile.AllowNullDestinationValues && !propertyMap.AllowNull)
{
var expressionNull = Expression.Constant(null, propertyMap.DestinationPropertyType);
transformedExpression =
Expression.Condition(Expression.NotEqual(result.ResolutionExpression, Expression.Constant(null)),
transformedExpression, expressionNull);
}
return Expression.Bind(propertyMap.DestinationProperty, transformedExpression);
}
private static MemberAssignment BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
var destinationListType = TypeHelper.GetElementType(propertyMap.DestinationPropertyType);
var sourceListType = TypeHelper.GetElementType(propertyMap.SourceType);
var expression = result.ResolutionExpression;
if (sourceListType != destinationListType)
{
var listTypePair = new ExpressionRequest(sourceListType, destinationListType, request.MembersToExpand);
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(listTypePair, typePairCount);
if (transformedExpression == null)
{
return(null);
}
expression = Expression.Call(typeof(Enumerable), "Select", new[] { sourceListType, destinationListType }, result.ResolutionExpression, transformedExpression);
}
expression = Expression.Call(typeof(Enumerable), propertyMap.DestinationPropertyType.IsArray ? "ToArray" : "ToList", new[] { destinationListType }, expression);
return(Expression.Bind(propertyMap.DestinationProperty, expression));
}
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary<ExpressionRequest, int> typePairCount)
{
return BindStringExpression(propertyMap, result);
}
public MemberAssignment Build(IMappingEngine mappingEngine, PropertyMap propertyMap, TypeMap propertyTypeMap,
ExpressionRequest request, ExpressionResolutionResult result, Internal.IDictionary<ExpressionRequest, int> typePairCount)
{
return BindMappedTypeExpression(mappingEngine, propertyMap, request, result, typePairCount);
}
public MemberAssignment Build(IMappingEngine mappingEngine, PropertyMap propertyMap, TypeMap propertyTypeMap,
ExpressionRequest request, ExpressionResolutionResult result,
IDictionary <ExpressionRequest, int> typePairCount)
{
return(BindAssignableExpression(propertyMap, result));
}
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount, LetPropertyMaps letPropertyMaps) => BindMappedTypeExpression(configuration, propertyMap, request, result, typePairCount, letPropertyMaps);
public override QueryExpressions GetSubQueryExpression(ExpressionBuilder builder, Expression projection, TypeMap typeMap, ExpressionRequest request, Expression instanceParameter, TypePairCount typePairCount)
{
var letMapInfos = _savedPaths.Select(path =>
new {
path.LetExpression,
MapFromSource = path.GetSourceExpression(instanceParameter),
Property = path.GetPropertyDescription(),
path.Marker
}).ToArray();
var properties = letMapInfos.Select(m => m.Property).Concat(GetMemberAccessesVisitor.Retrieve(projection, instanceParameter));
var letType = ProxyGenerator.GetSimilarType(typeof(object), properties);
TypeMap letTypeMap;
lock (ConfigurationProvider)
{
letTypeMap = TypeMapFactory.CreateTypeMap(request.SourceType, letType, typeMap.Profile);
}
var secondParameter = Parameter(letType, "dtoLet");
ReplaceSubQueries();
var firstExpression = builder.CreateMapExpressionCore(request, instanceParameter, typePairCount, letTypeMap, base.New());
return(new QueryExpressions(firstExpression, projection, secondParameter));
void ReplaceSubQueries()
{
foreach (var letMapInfo in letMapInfos)
{
var letProperty = letType.GetProperty(letMapInfo.Property.Name);
var letPropertyMap = letTypeMap.FindOrCreatePropertyMapFor(letProperty);
letPropertyMap.CustomMapExpression = Lambda(letMapInfo.LetExpression.ReplaceParameters(letMapInfo.MapFromSource), secondParameter);
projection = projection.Replace(letMapInfo.Marker, MakeMemberAccess(secondParameter, letProperty));
}
projection = new ReplaceMemberAccessesVisitor(instanceParameter, secondParameter).Visit(projection);
}
}
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount, LetPropertyMaps letPropertyMaps) => Bind(propertyMap.DestinationProperty, Convert(result.ResolutionExpression, propertyMap.DestinationPropertyType));
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount) => BindNullableExpression(propertyMap, result);
public MemberAssignment Build(IMappingEngine mappingEngine, PropertyMap propertyMap, TypeMap propertyTypeMap,
ExpressionRequest request, ExpressionResolutionResult result,
IDictionary<ExpressionRequest, int> typePairCount)
{
return BindNullableExpression(propertyMap, result);
}
public MemberAssignment Build(IMappingEngine mappingEngine, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
return(BindCustomProjectionExpression(propertyMap, propertyTypeMap, result));
}
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount, LetPropertyMaps letPropertyMaps)
{
var defaultDestination = Activator.CreateInstance(propertyMap.DestinationType);
return(Expression.Bind(propertyMap.DestinationMember, Expression.Coalesce(result.ResolutionExpression, Expression.Constant(defaultDestination))));
}
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
return(BindMappedTypeExpression(configuration, propertyMap, request, result, typePairCount));
}
private static MemberAssignment BindMappedTypeExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, ConcurrentDictionary <ExpressionRequest, int> typePairCount)
{
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(request, result.ResolutionExpression, typePairCount);
if (transformedExpression == null)
{
return(null);
}
// Handles null source property so it will not create an object with possible non-nullable propeerties
// which would result in an exception.
if (configuration.Configuration.AllowNullDestinationValues && !propertyMap.AllowNull)
{
var expressionNull = Expression.Constant(null, propertyMap.DestType);
transformedExpression =
Expression.Condition(Expression.NotEqual(result.ResolutionExpression, Expression.Constant(null)),
transformedExpression, expressionNull);
}
return(Expression.Bind(propertyMap.DestMember, transformedExpression));
}
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount)
{
return(BindCustomProjectionExpression(propertyMap, propertyTypeMap, result));
}
private static MemberAssignment BindMappedTypeExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary <ExpressionRequest, int> typePairCount, LetPropertyMaps letPropertyMaps)
{
var transformedExpression = configuration.ExpressionBuilder.CreateMapExpression(request, result.ResolutionExpression, typePairCount, letPropertyMaps);
if (transformedExpression == null)
{
return(null);
}
// Handles null source property so it will not create an object with possible non-nullable properties
// which would result in an exception.
if (propertyMap.TypeMap.Profile.AllowNullDestinationValues && !propertyMap.AllowNull && !(result.ResolutionExpression is ParameterExpression))
{
transformedExpression = result.ResolutionExpression.IfNullElse(Constant(null, transformedExpression.Type), transformedExpression);
}
return(Bind(propertyMap.DestinationProperty, transformedExpression));
}
public MemberAssignment Build(IConfigurationProvider configuration, PropertyMap propertyMap, TypeMap propertyTypeMap, ExpressionRequest request, ExpressionResolutionResult result, IDictionary<ExpressionRequest, int> typePairCount)
{
return BindMappedTypeExpression(configuration, propertyMap, request, result, typePairCount);
}