/// <summary>
/// Get the value from an expression.
/// </summary>
/// <param name="expression">The expression to be evaluated.</param>
/// <returns>the value.</returns>
public static object GetValue(this MethodCallExpression expression, JsonSerializerSettings jsonSerializerSettings)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (expression.Method.DeclaringType == typeof(SearchFns))
{
switch (expression.Method.Name)
{
case nameof(SearchFns.IsMatch):
{
string search = expression.Arguments[0].GetValue(jsonSerializerSettings) as string;
NewArrayExpression searchFieldsNewArrayExpression = expression.Arguments[1] as NewArrayExpression;
IEnumerable <string> searchFields = searchFieldsNewArrayExpression.Expressions.Select(_ => PropertyNameUtility.GetPropertyName(_, jsonSerializerSettings, false).ToString()).ToArray();
return($"search.ismatch('{search}', '{string.Join(", ", searchFields)}')");
}
case nameof(SearchFns.IsMatchScoring):
{
string search = expression.Arguments[0].GetValue(jsonSerializerSettings) as string;
NewArrayExpression searchFieldsNewArrayExpression = expression.Arguments[1] as NewArrayExpression;
IEnumerable <string> searchFields = searchFieldsNewArrayExpression.Expressions.Select(_ => PropertyNameUtility.GetPropertyName(_, jsonSerializerSettings, false).ToString()).ToArray();
return($"search.ismatchscoring('{search}', '{string.Join(", ", searchFields)}')");
}
case nameof(SearchFns.In):
{
string variable = PropertyNameUtility.GetPropertyName(expression.Arguments[0], jsonSerializerSettings, false);
NewArrayExpression valueListNewArrayExpression = expression.Arguments[1] as NewArrayExpression;
IEnumerable <object> valueList = valueListNewArrayExpression.Expressions.Select(_ => _.GetValue(jsonSerializerSettings)).ToArray();
return($"search.in('{variable}', '{string.Join(", ", valueList.Select(_ => _.ToString()).ToArray())}')");
}
case nameof(SearchFns.Score):
return("search.score()");
default:
throw new ArgumentException($"Invalid method {expression.Method}\r\n\t{expression}", nameof(expression));
}
}
else
{
return(expression.Method.Invoke(
expression.Object.GetValue(jsonSerializerSettings),
expression.Arguments.Select(_ => _.GetValue(jsonSerializerSettings)).ToArray()));
}
}
/// <summary>
/// Get the OData filter expression.
/// </summary>
/// <param name="unaryExpression">The expression from which to parse the OData filter.</param>
/// <returns>the OData filter.</returns>
public static string GetFilterExpression(UnaryExpression unaryExpression)
{
if (unaryExpression == null)
{
throw new ArgumentNullException(nameof(unaryExpression));
}
string operand = null;
switch (unaryExpression.Operand.NodeType)
{
case ExpressionType.MemberAccess:
{
MemberExpression memberExpression = unaryExpression.Operand as MemberExpression;
if (memberExpression == null)
{
throw new ArgumentException($"Expected {nameof(unaryExpression)}.{nameof(UnaryExpression.Operand)} to be of type {nameof(MemberExpression)}\r\n\t{unaryExpression}", nameof(unaryExpression));
}
operand = PropertyNameUtility.GetPropertyName(memberExpression, false);
}
break;
default:
throw new ArgumentException($"Invalid expression type {unaryExpression.Operand.NodeType}\r\n\t{unaryExpression}", nameof(unaryExpression));
}
switch (unaryExpression.NodeType)
{
case ExpressionType.IsFalse:
case ExpressionType.Not:
return($"not {operand}");
case ExpressionType.IsTrue:
return($"{operand}");
default:
throw new ArgumentException($"Invalid expression type {unaryExpression.NodeType}\r\n\t{unaryExpression}", nameof(unaryExpression));
}
}
/// <summary>
/// Get the OData filter expression.
/// </summary>
/// <param name="expression">The expression from which to parse the OData filter.</param>
/// <returns>the OData filter.</returns>
public static string GetFilterExpression(Expression expression)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
switch (expression.NodeType)
{
case ExpressionType.Equal:
case ExpressionType.GreaterThan:
case ExpressionType.GreaterThanOrEqual:
case ExpressionType.LessThan:
case ExpressionType.LessThanOrEqual:
case ExpressionType.NotEqual:
{
BinaryExpression binaryExpression = expression as BinaryExpression;
if (binaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(BinaryExpression)}\r\n\t{expression}", nameof(expression));
}
return(GetFilterExpression(binaryExpression));
}
case ExpressionType.IsFalse:
case ExpressionType.IsTrue:
case ExpressionType.Not:
{
UnaryExpression unaryExpression = expression as UnaryExpression;
if (unaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(UnaryExpression)}\r\n\t{expression}", nameof(expression));
}
return(GetFilterExpression(unaryExpression));
}
case ExpressionType.MemberAccess:
{
MemberExpression memberExpression = expression as MemberExpression;
if (memberExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(MemberExpression)}\r\n\t{expression}", nameof(expression));
}
return(PropertyNameUtility.GetPropertyName(memberExpression, false));
}
case ExpressionType.Call:
{
MethodCallExpression methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(MethodCallExpression)}\r\n\t{expression}", nameof(expression));
}
switch (methodCallExpression.Method.Name)
{
case nameof(Queryable.Any):
case nameof(Queryable.All):
{
IList <string> parts = new List <string>();
int idx = 0;
foreach (Expression argumentExpression in methodCallExpression.Arguments)
{
idx++;
switch (argumentExpression.NodeType)
{
case ExpressionType.MemberAccess:
{
MemberExpression argumentMemberExpression = argumentExpression as MemberExpression;
if (argumentMemberExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(MemberExpression)}\r\n\t{methodCallExpression}", nameof(expression));
}
parts.Add(PropertyNameUtility.GetPropertyName(argumentMemberExpression, false));
}
break;
case ExpressionType.Lambda:
{
LambdaExpression argumentLambdaExpression = argumentExpression as LambdaExpression;
if (argumentLambdaExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(LambdaExpression)}\r\n\t{methodCallExpression}", nameof(expression));
}
ParameterExpression argumentParameterExpression = argumentLambdaExpression.Parameters.SingleOrDefault() as ParameterExpression;
if (argumentParameterExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}].{nameof(LambdaExpression.Parameters)}[0] to be of type {nameof(ParameterExpression)}\r\n\t{argumentLambdaExpression}", nameof(expression));
}
string inner = GetFilterExpression(argumentLambdaExpression);
parts.Add(Constants.ODataMemberAccessOperator);
parts.Add(methodCallExpression.Method.Name.ToLowerInvariant());
parts.Add($"({argumentParameterExpression.Name}:{argumentParameterExpression.Name}");
if (string.IsNullOrWhiteSpace(inner) == false &&
inner.StartsWith(" ") == false)
{
parts.Add(Constants.ODataMemberAccessOperator);
}
parts.Add(inner);
parts.Add(")");
}
break;
default:
throw new ArgumentException($"Invalid expression type {argumentExpression.NodeType}\r\n\t{methodCallExpression}", nameof(expression));
}
}
return(string.Join(string.Empty, parts));
}
case nameof(Queryable.Select):
{
IList <string> parts = new List <string>();
int idx = -1;
foreach (Expression argumentExpression in methodCallExpression.Arguments)
{
idx++;
switch (argumentExpression.NodeType)
{
case ExpressionType.MemberAccess:
{
MemberExpression argumentMemberExpression = argumentExpression as MemberExpression;
if (argumentMemberExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(MemberExpression)}\r\n\t{expression}", nameof(expression));
}
parts.Add(PropertyNameUtility.GetPropertyName(argumentMemberExpression, false));
}
break;
case ExpressionType.Lambda:
{
LambdaExpression argumentLambdaExpression = argumentExpression as LambdaExpression;
if (argumentLambdaExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(LambdaExpression)}\r\n\t{expression}", nameof(expression));
}
ParameterExpression argumentParameterExpression = argumentLambdaExpression.Parameters.SingleOrDefault() as ParameterExpression;
if (argumentParameterExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}].{nameof(LambdaExpression.Parameters)}[0] to be of type {nameof(ParameterExpression)}\r\n\t{argumentLambdaExpression}", nameof(expression));
}
string inner = GetFilterExpression(argumentLambdaExpression);
parts.Add(Constants.ODataMemberAccessOperator);
parts.Add(inner);
}
break;
default:
throw new ArgumentException($"Invalid expression type {argumentExpression.NodeType}\r\n\t{expression}", nameof(expression));
}
}
return(string.Join(string.Empty, parts));
}
case nameof(string.Format):
{
Func <string> stringFormat = Expression.Lambda <Func <string> >(Expression.Convert(methodCallExpression, methodCallExpression.Type)).Compile();
return(stringFormat());
}
default:
throw new ArgumentException($"Invalid method {methodCallExpression.Method}\r\n\t{expression}", nameof(expression));
}
}
case ExpressionType.And:
case ExpressionType.AndAlso:
case ExpressionType.Or:
case ExpressionType.OrElse:
{
BinaryExpression binaryExpression = expression as BinaryExpression;
if (binaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(LambdaExpression.Body)} to be of type {nameof(BinaryExpression)}\r\n\t{expression}", nameof(expression));
}
string op = expression.NodeType == ExpressionType.And || expression.NodeType == ExpressionType.AndAlso
? "and"
: "or";
return($"({GetFilterExpression(binaryExpression.Left)}) {op} ({GetFilterExpression(binaryExpression.Right)})");
}
default:
throw new ArgumentException($"Invalid expression type {expression.NodeType}\r\n\t{expression}", nameof(expression));
}
}
/// <summary>
/// Get the OData filter expression.
/// </summary>
/// <param name="binaryExpression">The expression from which to parse the OData filter.</param>
/// <returns>the OData filter.</returns>
public static string GetFilterExpression(BinaryExpression binaryExpression)
{
if (binaryExpression == null || binaryExpression.Left == null || binaryExpression.Right == null)
{
throw new ArgumentNullException(nameof(binaryExpression));
}
string op = null;
switch (binaryExpression.NodeType)
{
case ExpressionType.Equal:
op = "eq";
break;
case ExpressionType.GreaterThan:
op = "gt";
break;
case ExpressionType.GreaterThanOrEqual:
op = "ge";
break;
case ExpressionType.LessThan:
op = "lt";
break;
case ExpressionType.LessThanOrEqual:
op = "le";
break;
case ExpressionType.NotEqual:
op = "ne";
break;
default:
throw new ArgumentException($"Invalid expression type {binaryExpression.NodeType}\r\n\t{binaryExpression}", nameof(binaryExpression));
}
string left = null;
switch (binaryExpression.Left.NodeType)
{
case ExpressionType.MemberAccess:
{
MemberExpression memberExpression = binaryExpression.Left as MemberExpression;
if (memberExpression == null)
{
throw new ArgumentException($"Expected {nameof(binaryExpression)}.{nameof(BinaryExpression.Left)} to be of type {nameof(MemberExpression)}\r\n\t{binaryExpression}", nameof(binaryExpression));
}
left = PropertyNameUtility.GetPropertyName(memberExpression, false);
}
break;
case ExpressionType.Parameter:
left = string.Empty;
break;
case ExpressionType.Convert:
{
UnaryExpression unaryExpression = binaryExpression.Left as UnaryExpression;
if (unaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(binaryExpression)}.{nameof(BinaryExpression.Left)} to be of type {nameof(UnaryExpression)}\r\n\t{binaryExpression}", nameof(binaryExpression));
}
switch (unaryExpression.Operand.NodeType)
{
case ExpressionType.MemberAccess:
{
MemberExpression memberExpression = unaryExpression.Operand as MemberExpression;
if (unaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(binaryExpression)}.{nameof(BinaryExpression.Left)}.{nameof(UnaryExpression.Operand)} to be of type {nameof(MemberExpression)}\r\n\t{binaryExpression}", nameof(binaryExpression));
}
left = PropertyNameUtility.GetPropertyName(memberExpression, false);
}
break;
default:
throw new ArgumentException($"Invalid expression type {unaryExpression.Operand.GetType()}", nameof(binaryExpression));
}
}
break;
default:
throw new ArgumentException($"Invalid expression type {binaryExpression.Left.NodeType}\r\n\t{binaryExpression}", nameof(binaryExpression));
}
object rightValue = binaryExpression.Right.GetValue();
if (rightValue == null)
{
throw new ArgumentException($"Invalid expression body type {binaryExpression.Right.GetType()}", nameof(binaryExpression));
}
string right = null;
if (rightValue.GetType() == typeof(string))
{
right = string.Concat("'", rightValue as string, "'");
}
else if (rightValue.GetType() == typeof(Guid) ||
rightValue.GetType() == typeof(Guid?) ||
rightValue.GetType() == typeof(TimeSpan) ||
rightValue.GetType() == typeof(TimeSpan?))
{
right = string.Concat("'", rightValue.ToString().ToLowerInvariant(), "'");
}
else if (rightValue.GetType() == typeof(DateTime) ||
rightValue.GetType() == typeof(DateTime?))
{
right = string.Concat("'", ((DateTime)rightValue).ToString("O"), "'");
}
else if (rightValue.GetType() == typeof(DateTimeOffset) ||
rightValue.GetType() == typeof(DateTimeOffset?))
{
right = string.Concat("'", ((DateTimeOffset)rightValue).ToString("O"), "'");
}
else if (rightValue.GetType() == typeof(bool) ||
rightValue.GetType() == typeof(bool?))
{
right = rightValue.ToString().ToLowerInvariant();
}
else
{
right = rightValue.ToString();
}
return($"{left} {op} {right}");
}
/// <summary>
/// Get the OData filter expression.
/// </summary>
/// <param name="expression">The expression from which to parse the OData filter.</param>
/// <returns>the OData filter.</returns>
public static string GetFilterExpression(Expression expression, JsonSerializerSettings jsonSerializerSettings)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
switch (expression.NodeType)
{
case ExpressionType.Equal:
case ExpressionType.GreaterThan:
case ExpressionType.GreaterThanOrEqual:
case ExpressionType.LessThan:
case ExpressionType.LessThanOrEqual:
case ExpressionType.NotEqual:
{
BinaryExpression binaryExpression = expression as BinaryExpression;
if (binaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(BinaryExpression)}\r\n\t{expression}", nameof(expression));
}
return(GetFilterExpression(binaryExpression, jsonSerializerSettings));
}
case ExpressionType.IsFalse:
case ExpressionType.IsTrue:
case ExpressionType.Not:
{
UnaryExpression unaryExpression = expression as UnaryExpression;
if (unaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(UnaryExpression)}\r\n\t{expression}", nameof(expression));
}
return(GetFilterExpression(unaryExpression, jsonSerializerSettings));
}
case ExpressionType.MemberAccess:
{
MemberExpression memberExpression = expression as MemberExpression;
if (memberExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(MemberExpression)}\r\n\t{expression}", nameof(expression));
}
return(PropertyNameUtility.GetPropertyName(memberExpression, jsonSerializerSettings, false));
}
case ExpressionType.Call:
{
MethodCallExpression methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(MethodCallExpression)}\r\n\t{expression}", nameof(expression));
}
if (methodCallExpression.Method.DeclaringType == typeof(SearchFns))
{
switch (methodCallExpression.Method.Name)
{
case nameof(SearchFns.IsMatch):
{
string search = methodCallExpression.Arguments[0].GetValue(jsonSerializerSettings) as string;
NewArrayExpression searchFieldsNewArrayExpression = methodCallExpression.Arguments[1] as NewArrayExpression;
IEnumerable <string> searchFields = searchFieldsNewArrayExpression.Expressions.Select(_ => PropertyNameUtility.GetPropertyName(_, jsonSerializerSettings, false).ToString()).ToArray();
return($"search.ismatch('{search}', '{string.Join(", ", searchFields)}')");
}
case nameof(SearchFns.IsMatchScoring):
{
string search = methodCallExpression.Arguments[0].GetValue(jsonSerializerSettings) as string;
NewArrayExpression searchFieldsNewArrayExpression = methodCallExpression.Arguments[1] as NewArrayExpression;
IEnumerable <string> searchFields = searchFieldsNewArrayExpression.Expressions.Select(_ => PropertyNameUtility.GetPropertyName(_, jsonSerializerSettings, false).ToString()).ToArray();
return($"search.ismatchscoring('{search}', '{string.Join(", ", searchFields)}')");
}
case nameof(SearchFns.In):
{
string variable = PropertyNameUtility.GetPropertyName(methodCallExpression.Arguments[0], jsonSerializerSettings, false);
NewArrayExpression valueListNewArrayExpression = methodCallExpression.Arguments[1] as NewArrayExpression;
IEnumerable <object> valueList = valueListNewArrayExpression.Expressions.Select(_ => _.GetValue(jsonSerializerSettings)).ToArray();
return($"search.in('{variable}', '{string.Join(", ", valueList.Select(_ => _.ToString()).ToArray())}')");
}
case nameof(SearchFns.Score):
return("search.score()");
default:
throw new ArgumentException($"Invalid method {methodCallExpression.Method}\r\n\t{expression}", nameof(expression));
}
}
else
{
switch (methodCallExpression.Method.Name)
{
case nameof(Queryable.Any):
case nameof(Queryable.All):
{
IList <string> parts = new List <string>();
int idx = 0;
foreach (Expression argumentExpression in methodCallExpression.Arguments)
{
idx++;
switch (argumentExpression.NodeType)
{
case ExpressionType.MemberAccess:
{
MemberExpression argumentMemberExpression = argumentExpression as MemberExpression;
if (argumentMemberExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(MemberExpression)}\r\n\t{methodCallExpression}", nameof(expression));
}
parts.Add(PropertyNameUtility.GetPropertyName(argumentMemberExpression, jsonSerializerSettings, false));
}
break;
case ExpressionType.Lambda:
{
LambdaExpression argumentLambdaExpression = argumentExpression as LambdaExpression;
if (argumentLambdaExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(LambdaExpression)}\r\n\t{methodCallExpression}", nameof(expression));
}
ParameterExpression argumentParameterExpression = argumentLambdaExpression.Parameters.SingleOrDefault() as ParameterExpression;
if (argumentParameterExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}].{nameof(LambdaExpression.Parameters)}[0] to be of type {nameof(ParameterExpression)}\r\n\t{argumentLambdaExpression}", nameof(expression));
}
string inner = GetFilterExpression(argumentLambdaExpression, jsonSerializerSettings);
parts.Add(Constants.ODataMemberAccessOperator);
parts.Add(methodCallExpression.Method.Name.ToLowerInvariant());
parts.Add($"({argumentParameterExpression.Name}:{argumentParameterExpression.Name}");
if (string.IsNullOrWhiteSpace(inner) == false &&
inner.StartsWith(" ") == false)
{
parts.Add(Constants.ODataMemberAccessOperator);
}
parts.Add(inner);
parts.Add(")");
}
break;
default:
throw new ArgumentException($"Invalid expression type {argumentExpression.NodeType}\r\n\t{methodCallExpression}", nameof(expression));
}
}
return(string.Join(string.Empty, parts));
}
case nameof(Queryable.Select):
{
IList <string> parts = new List <string>();
int idx = -1;
foreach (Expression argumentExpression in methodCallExpression.Arguments)
{
idx++;
switch (argumentExpression.NodeType)
{
case ExpressionType.MemberAccess:
{
MemberExpression argumentMemberExpression = argumentExpression as MemberExpression;
if (argumentMemberExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(MemberExpression)}\r\n\t{expression}", nameof(expression));
}
parts.Add(PropertyNameUtility.GetPropertyName(argumentMemberExpression, jsonSerializerSettings, false));
}
break;
case ExpressionType.Lambda:
{
LambdaExpression argumentLambdaExpression = argumentExpression as LambdaExpression;
if (argumentLambdaExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(LambdaExpression)}\r\n\t{expression}", nameof(expression));
}
ParameterExpression argumentParameterExpression = argumentLambdaExpression.Parameters.SingleOrDefault() as ParameterExpression;
if (argumentParameterExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}].{nameof(LambdaExpression.Parameters)}[0] to be of type {nameof(ParameterExpression)}\r\n\t{argumentLambdaExpression}", nameof(expression));
}
string inner = GetFilterExpression(argumentLambdaExpression, jsonSerializerSettings);
parts.Add(Constants.ODataMemberAccessOperator);
parts.Add(inner);
}
break;
default:
throw new ArgumentException($"Invalid expression type {argumentExpression.NodeType}\r\n\t{expression}", nameof(expression));
}
}
return(string.Join(string.Empty, parts));
}
case nameof(string.Format):
{
string format = null;
IList <object> parts = new List <object>();
int idx = -1;
foreach (Expression argumentExpression in methodCallExpression.Arguments)
{
idx++;
switch (argumentExpression.NodeType)
{
case ExpressionType.Convert:
{
UnaryExpression unaryExpression = argumentExpression as UnaryExpression;
if (unaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)} to be of type {nameof(UnaryExpression)}\r\n\t{expression}", nameof(expression));
}
if (idx == 0)
{
format = unaryExpression.GetValue(jsonSerializerSettings)?.ToString();
}
else
{
parts.Add(unaryExpression.GetValue(jsonSerializerSettings));
}
}
break;
case ExpressionType.Constant:
{
ConstantExpression constantExpression = argumentExpression as ConstantExpression;
if (constantExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(ConstantExpression)}\r\n\t{expression}", nameof(expression));
}
if (idx == 0)
{
format = constantExpression.Value?.ToString();
}
else
{
parts.Add(constantExpression.Value);
}
}
break;
case ExpressionType.MemberAccess:
{
MemberExpression argumentMemberExpression = argumentExpression as MemberExpression;
if (argumentMemberExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(MemberExpression)}\r\n\t{expression}", nameof(expression));
}
if (idx == 0)
{
format = PropertyNameUtility.GetPropertyName(argumentMemberExpression, jsonSerializerSettings, false);
}
else
{
parts.Add(PropertyNameUtility.GetPropertyName(argumentMemberExpression, jsonSerializerSettings, false));
}
}
break;
case ExpressionType.Lambda:
{
LambdaExpression argumentLambdaExpression = argumentExpression as LambdaExpression;
if (argumentLambdaExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}] to be of type {nameof(LambdaExpression)}\r\n\t{expression}", nameof(expression));
}
ParameterExpression argumentParameterExpression = argumentLambdaExpression.Parameters.SingleOrDefault() as ParameterExpression;
if (argumentParameterExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(methodCallExpression.Arguments)}[{idx}].{nameof(LambdaExpression.Parameters)}[0] to be of type {nameof(ParameterExpression)}\r\n\t{argumentLambdaExpression}", nameof(expression));
}
string inner = GetFilterExpression(argumentLambdaExpression, jsonSerializerSettings);
if (idx == 0)
{
format = inner;
}
else
{
parts.Add(inner);
}
}
break;
default:
throw new ArgumentException($"Invalid expression type {argumentExpression.NodeType}\r\n\t{expression}", nameof(expression));
}
}
return(string.Format(format, parts.ToArray()));
}
default:
throw new ArgumentException($"Invalid method {methodCallExpression.Method}\r\n\t{expression}", nameof(expression));
}
}
}
case ExpressionType.And:
case ExpressionType.AndAlso:
case ExpressionType.Or:
case ExpressionType.OrElse:
{
BinaryExpression binaryExpression = expression as BinaryExpression;
if (binaryExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(LambdaExpression.Body)} to be of type {nameof(BinaryExpression)}\r\n\t{expression}", nameof(expression));
}
string op = expression.NodeType == ExpressionType.And || expression.NodeType == ExpressionType.AndAlso
? "and"
: "or";
return($"({GetFilterExpression(binaryExpression.Left, jsonSerializerSettings)}) {op} ({GetFilterExpression(binaryExpression.Right, jsonSerializerSettings)})");
}
case ExpressionType.Constant:
{
ConstantExpression constantExpression = expression as ConstantExpression;
if (constantExpression == null)
{
throw new ArgumentException($"Expected {nameof(expression)}.{nameof(LambdaExpression.Body)} to be of type {nameof(ConstantExpression)}\r\n\t{expression}", nameof(expression));
}
return(constantExpression.Value?.ToString());
}
default:
throw new ArgumentException($"Invalid expression type {expression.NodeType}\r\n\t{expression}", nameof(expression));
}
}
