/// <summary>
/// Initializes a new instance of the <see cref="FunctionSegmentTemplate" /> class.
/// </summary>
/// <param name="function">The Edm function, it should be bound function.</param>
/// <param name="navigationSource">The Edm navigation source of this function return. It could be null.</param>
/// <param name="requiredParameters">The required parameters of this function.</param>
public FunctionSegmentTemplate(IEdmFunction function, IEdmNavigationSource navigationSource, ISet <string> requiredParameters)
{
Function = function ?? throw Error.ArgumentNull(nameof(function));
NavigationSource = navigationSource;
RequiredParameters = requiredParameters ?? throw Error.ArgumentNull(nameof(requiredParameters));
// Only accept the bound function
if (!function.IsBound)
{
throw new ODataException(string.Format(CultureInfo.CurrentCulture, SRResources.FunctionIsNotBound, function.Name));
}
// make sure the input parameter is subset of the function paremeters.
ISet <string> functionParameters = function.GetFunctionParamters();
if (!requiredParameters.IsSubsetOf(functionParameters))
{
string required = string.Join(",", requiredParameters);
string actual = string.Join(",", functionParameters);
throw new ODataException(Error.Format(SRResources.RequiredParametersNotSubsetOfFunctionParameters, required, actual));
}
// Join the parameters as p1={p1}
string parameters = "(" + string.Join(",", requiredParameters.Select(a => $"{a}={{{a}}}")) + ")";
UnqualifiedIdentifier = function.Name + parameters;
Literal = function.FullName() + parameters;
// Function will always have the return type
IsSingle = function.ReturnType.TypeKind() != EdmTypeKind.Collection;
}
/// <summary>
/// Initializes a new instance of the <see cref="FunctionSegmentTemplate" /> class.
/// </summary>
/// <param name="function">The Edm function, it should be bound function.</param>
/// <param name="navigationSource">The Edm navigation source of this function return. It could be null.</param>
public FunctionSegmentTemplate(IEdmFunction function, IEdmNavigationSource navigationSource)
: this(function, navigationSource, function?.GetFunctionParamters())
{
}