internal static List<LambdaExpression> GetReturnConversions(ParameterConversionConfiguration conversionConfig, Type initialReturnType, ExcelReturnRegistration returnRegistration)
{
var appliedConversions = new List<LambdaExpression>();
// paramReg might be modified internally by the conversions, but won't become a different object
var returnType = initialReturnType; // Might become a different type as we convert
foreach (var returnConversion in conversionConfig.ReturnConversions)
{
var lambda = returnConversion.Convert(returnType, returnRegistration);
if (lambda == null)
continue;
// We got one to apply...
// Some sanity checks
Debug.Assert(lambda.Parameters.Count == 1);
Debug.Assert(lambda.Parameters[0].Type == returnType);
appliedConversions.Add(lambda);
// Change the Return Type to be whatever the conversion function returns
// for the next round of processing
returnType = lambda.ReturnType;
}
if (appliedConversions.Count == 0)
return null;
return appliedConversions;
}
/// <summary>
/// Creates a new ExcelFunctionRegistration with the given LambdaExpression.
/// Uses the passes in attributes for registration.
///
/// The number of ExcelParameterRegistrations passed in must match the number of parameters in the LambdaExpression.
/// </summary>
/// <param name="functionLambda"></param>
/// <param name="functionAttribute"></param>
/// <param name="parameterRegistrations"></param>
public ExcelFunctionRegistration(LambdaExpression functionLambda, ExcelFunctionAttribute functionAttribute, IEnumerable <ExcelParameterRegistration> parameterRegistrations = null)
{
if (functionLambda == null)
{
throw new ArgumentNullException("functionLambda");
}
if (functionAttribute == null)
{
throw new ArgumentNullException("functionAttribute");
}
FunctionLambda = functionLambda;
FunctionAttribute = functionAttribute;
if (parameterRegistrations == null)
{
if (functionLambda.Parameters.Count != 0)
{
throw new ArgumentOutOfRangeException("parameterRegistrations", "No parameter registrations provided, but function has parameters.");
}
ParameterRegistrations = new List <ExcelParameterRegistration>();
}
else
{
ParameterRegistrations = new List <ExcelParameterRegistration>(parameterRegistrations);
if (functionLambda.Parameters.Count != ParameterRegistrations.Count)
{
throw new ArgumentOutOfRangeException("parameterRegistrations", "Mismatched number of ParameterRegistrations provided.");
}
}
// Create the lists - hope the rest is filled in right...?
CustomAttributes = new List <object>();
ReturnRegistration = new ExcelReturnRegistration();
}
/// <summary>
/// Creates a new ExcelFunctionRegistration from a LambdaExpression.
/// Uses the Name and Parameter Names to fill in the default attributes.
/// </summary>
/// <param name="functionLambda"></param>
public ExcelFunctionRegistration(LambdaExpression functionLambda)
{
if (functionLambda == null) throw new ArgumentNullException("functionLambda");
FunctionLambda = functionLambda;
FunctionAttribute = new ExcelFunctionAttribute { Name = functionLambda.Name };
ParameterRegistrations = functionLambda.Parameters
.Select( p => new ExcelParameterRegistration(new ExcelArgumentAttribute { Name = p.Name }))
.ToList();
CustomAttributes = new List<object>();
ReturnRegistration = new ExcelReturnRegistration();
}
// NOTE: 16 parameter max for Expression.GetDelegateType
// Copies all the (non Excel...) attributes from the method into the CustomAttribute lists.
// TODO: What about native async function, which returns 'Void'?
/// <summary>
/// Creates a new ExcelFunctionRegistration from a MethodInfo, with a LambdaExpression that represents a call to the method.
/// Uses the Name and Parameter Names from the MethodInfo to fill in the default attributes.
/// All CustomAttributes on the method and parameters are copies to the respective collections in the ExcelFunctionRegistration.
/// </summary>
/// <param name="methodInfo"></param>
public ExcelFunctionRegistration(MethodInfo methodInfo)
{
CustomAttributes = new List <object>();
var paramExprs = methodInfo.GetParameters()
.Select(pi => Expression.Parameter(pi.ParameterType, pi.Name))
.ToList();
FunctionLambda = Expression.Lambda(Expression.Call(methodInfo, paramExprs), methodInfo.Name, paramExprs);
var allMethodAttributes = methodInfo.GetCustomAttributes(true);
foreach (var att in allMethodAttributes)
{
var funcAtt = att as ExcelFunctionAttribute;
if (funcAtt != null)
{
FunctionAttribute = funcAtt;
// At least ensure that name is set - from the method if need be.
if (string.IsNullOrEmpty(FunctionAttribute.Name))
{
FunctionAttribute.Name = methodInfo.Name;
}
}
else
{
CustomAttributes.Add(att);
}
}
// Check that ExcelFunctionAttribute has been set
if (FunctionAttribute == null)
{
FunctionAttribute = new ExcelFunctionAttribute {
Name = methodInfo.Name
};
}
ParameterRegistrations = methodInfo.GetParameters().Select(pi => new ExcelParameterRegistration(pi)).ToList();
ReturnRegistration = new ExcelReturnRegistration();
ReturnRegistration.CustomAttributes.AddRange(methodInfo.ReturnParameter.GetCustomAttributes(true));
// Check that we haven't made a mistake
Debug.Assert(IsValid());
}
/// <summary>
/// Creates a new ExcelFunctionRegistration from a LambdaExpression.
/// Uses the Name and Parameter Names to fill in the default attributes.
/// </summary>
/// <param name="functionLambda"></param>
public ExcelFunctionRegistration(LambdaExpression functionLambda)
{
if (functionLambda == null)
{
throw new ArgumentNullException("functionLambda");
}
FunctionLambda = functionLambda;
FunctionAttribute = new ExcelFunctionAttribute {
Name = functionLambda.Name
};
ParameterRegistrations = functionLambda.Parameters
.Select(p => new ExcelParameterRegistration(new ExcelArgumentAttribute {
Name = p.Name
}))
.ToList();
CustomAttributes = new List <object>();
ReturnRegistration = new ExcelReturnRegistration();
}
/// <summary>
/// Creates a new ExcelFunctionRegistration with the given LambdaExpression.
/// Uses the passes in attributes for registration.
///
/// The number of ExcelParameterRegistrations passed in must match the number of parameters in the LambdaExpression.
/// </summary>
/// <param name="functionLambda"></param>
/// <param name="functionAttribute"></param>
/// <param name="parameterRegistrations"></param>
public ExcelFunctionRegistration(LambdaExpression functionLambda, ExcelFunctionAttribute functionAttribute, IEnumerable<ExcelParameterRegistration> parameterRegistrations = null)
{
if (functionLambda == null) throw new ArgumentNullException("functionLambda");
if (functionAttribute == null) throw new ArgumentNullException("functionAttribute");
FunctionLambda = functionLambda;
FunctionAttribute = functionAttribute;
if (parameterRegistrations == null)
{
if (functionLambda.Parameters.Count != 0) throw new ArgumentOutOfRangeException("parameterRegistrations", "No parameter registrations provided, but function has parameters.");
ParameterRegistrations = new List<ExcelParameterRegistration>();
}
else
{
ParameterRegistrations = new List<ExcelParameterRegistration>(parameterRegistrations);
if (functionLambda.Parameters.Count != ParameterRegistrations.Count) throw new ArgumentOutOfRangeException("parameterRegistrations", "Mismatched number of ParameterRegistrations provided.");
}
// Create the lists - hope the rest is filled in right...?
CustomAttributes = new List<object>();
ReturnRegistration = new ExcelReturnRegistration();
}
// NOTE: 16 parameter max for Expression.GetDelegateType
// Copies all the (non Excel...) attributes from the method into the CustomAttribute lists.
// TODO: What about native async function, which returns 'Void'?
/// <summary>
/// Creates a new ExcelFunctionRegistration from a MethodInfo, with a LambdaExpression that represents a call to the method.
/// Uses the Name and Parameter Names from the MethodInfo to fill in the default attributes.
/// All CustomAttributes on the method and parameters are copies to the respective collections in the ExcelFunctionRegistration.
/// </summary>
/// <param name="methodInfo"></param>
public ExcelFunctionRegistration(MethodInfo methodInfo)
{
CustomAttributes = new List<object>();
var paramExprs = methodInfo.GetParameters()
.Select(pi => Expression.Parameter(pi.ParameterType, pi.Name))
.ToList();
FunctionLambda = Expression.Lambda(Expression.Call(methodInfo, paramExprs), methodInfo.Name, paramExprs);
var allMethodAttributes = methodInfo.GetCustomAttributes(true);
foreach (var att in allMethodAttributes)
{
var funcAtt = att as ExcelFunctionAttribute;
if (funcAtt != null)
{
FunctionAttribute = funcAtt;
// At least ensure that name is set - from the method if need be.
if (string.IsNullOrEmpty(FunctionAttribute.Name))
FunctionAttribute.Name = methodInfo.Name;
}
else
{
CustomAttributes.Add(att);
}
}
// Check that ExcelFunctionAttribute has been set
if (FunctionAttribute == null)
{
FunctionAttribute = new ExcelFunctionAttribute { Name = methodInfo.Name };
}
ParameterRegistrations = methodInfo.GetParameters().Select(pi => new ExcelParameterRegistration(pi)).ToList();
ReturnRegistration = new ExcelReturnRegistration();
ReturnRegistration.CustomAttributes.AddRange(methodInfo.ReturnParameter.GetCustomAttributes(true));
// Check that we haven't made a mistake
Debug.Assert(IsValid());
}
internal static LambdaExpression GetReturnConversion(ParameterConversionConfiguration conversionConfig,
Type initialReturnType, ExcelReturnRegistration returnRegistration)
{
return(ComposeLambdas(GetReturnConversions(conversionConfig, initialReturnType, returnRegistration)));
}
public ShimParameter(Type type, ExcelReturnRegistration reg, ParameterConversionConfiguration config)
: this(type, reg.CustomAttributes)
{
ReturnRegistration = reg;
PreparePropertyConverters(config, reg, ParameterConversionRegistration.GetReturnConversion);
}
internal static LambdaExpression GetReturnConversion(ParameterConversionConfiguration conversionConfig,
Type initialReturnType, ExcelReturnRegistration returnRegistration)
{
return ComposeLambdas(GetReturnConversions(conversionConfig, initialReturnType, returnRegistration));
}