public static string GetExpressionInfo(Expression expression, ExpressionInfo expressionInfo)
{
string fullPath;
var memberExpression = expression as MemberExpression;
if (memberExpression != null)
{
if (memberExpression.Expression.NodeType == ExpressionType.MemberAccess ||
memberExpression.Expression.NodeType == ExpressionType.Call)
{
if (memberExpression.Member.DeclaringType.IsNullable())
{
// it's a Nullable<T>, so ignore any .Value
if (memberExpression.Member.Name == "Value")
{
fullPath = GetExpressionInfo(memberExpression.Expression, expressionInfo);
expressionInfo.FullPath = fullPath;
return(fullPath);
}
}
fullPath = GetExpressionInfo(memberExpression.Expression, expressionInfo) + "." + memberExpression.Member.Name;
expressionInfo.FullPath = fullPath;
expressionInfo.AddSubExpression(memberExpression);
return(fullPath);
//return GetExpressionInfo(memberExpression.Expression) + "." + memberExpression.Member.Name;
}
if (IsConversion(memberExpression.Expression.NodeType))
{
fullPath = (GetExpressionInfo(memberExpression.Expression, expressionInfo) + "." + memberExpression.Member.Name).TrimStart('.');;
expressionInfo.FullPath = fullPath;
expressionInfo.AddSubExpression(memberExpression);
return(fullPath);
//return (GetExpressionInfo(memberExpression.Expression) + "." + memberExpression.Member.Name).TrimStart('.');
}
fullPath = memberExpression.Member.Name;
expressionInfo.FullPath = fullPath;
expressionInfo.AddSubExpression(memberExpression);
return(fullPath);
//return memberExpression.Member.Name;
}
var unaryExpression = expression as UnaryExpression;
if (unaryExpression != null)
{
if (!IsConversion(unaryExpression.NodeType))
{
throw new Exception("Cannot interpret member from " + expression);
}
fullPath = GetExpressionInfo(unaryExpression.Operand, expressionInfo);
expressionInfo.FullPath = fullPath;
return(fullPath);
//return GetExpressionInfo(unaryExpression.Operand);
}
var methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression != null)
{
/*
* if (methodCallExpression.Method.Name == "GetType")
* return ClassMember(methodCallExpression.Object);
*/
if (methodCallExpression.Method.Name == "get_Item")
{
fullPath = GetExpressionInfo(methodCallExpression.Object, expressionInfo);
expressionInfo.FullPath = fullPath;
return(fullPath);
//return GetExpressionInfo(methodCallExpression.Object);
}
if (methodCallExpression.Method.Name == "First")
{
fullPath = GetExpressionInfo(methodCallExpression.Arguments[0], expressionInfo);
expressionInfo.FullPath = fullPath;
return(fullPath);
//return GetExpressionInfo(methodCallExpression.Arguments[0]);
}
throw new Exception("Unrecognised method call in expression " + methodCallExpression);
}
if (expression is ParameterExpression)
{
return("");
}
throw new Exception("Could not determine member from " + expression);
}
