/// <summary>
/// Generates an <see cref="Expression"/> node from a collection of input arguments.
/// The result can be chained with other builders in a workflow.
/// </summary>
/// <param name="arguments">
/// A collection of <see cref="Expression"/> nodes that represents the input arguments.
/// </param>
/// <returns>An <see cref="Expression"/> tree node.</returns>
public override Expression Build(IEnumerable <Expression> arguments)
{
if (buildContext == null)
{
throw new InvalidOperationException("No valid build context was provided.");
}
var source = arguments.First();
var subjectFactory = BuildSubject(source);
var parameterType = source.Type.GetGenericArguments()[0];
var subjectExpression = buildContext.AddVariable(Name, subjectFactory);
return(Expression.Call(typeof(SubjectBuilder), "Process", new[] { parameterType }, source, subjectExpression));
}
public ParameterExpression AddVariable(string name, Expression expression)
{
return(parent.AddVariable(name, expression));
}
