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// Copyright 2009-2022 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System;
using System.Collections.Generic;
using System.Dynamic;
namespace CsvHelper.Expressions
{
/// <summary>
/// Creates dynamic records.
/// </summary>
public class DynamicRecordCreator : RecordCreator
{
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name="reader">The reader.</param>
public DynamicRecordCreator(CsvReader reader) : base(reader) { }
/// <summary>
/// Creates a <see cref="Delegate"/> of type <see cref="Func{T}"/>
/// that will create a record of the given type using the current
/// reader row.
/// </summary>
/// <param name="recordType">The record type.</param>
protected override Delegate CreateCreateRecordDelegate(Type recordType) => (Func<dynamic>)CreateDynamicRecord;
/// <summary>
/// Creates a dynamic record of the current reader row.
/// </summary>
protected virtual dynamic CreateDynamicRecord()
{
var obj = new ExpandoObject();
var dict = obj as IDictionary<string, object>;
if (Reader.HeaderRecord != null)
{
for (var i = 0; i < Reader.HeaderRecord.Length; i++)
{
var args = new GetDynamicPropertyNameArgs(i, Reader.Context);
var propertyName = Reader.Configuration.GetDynamicPropertyName(args);
Reader.TryGetField(i, out string field);
dict.Add(propertyName, field);
}
}
else
{
for (var i = 0; i < Reader.Parser.Count; i++)
{
var args = new GetDynamicPropertyNameArgs(i, Reader.Context);
var propertyName = Reader.Configuration.GetDynamicPropertyName(args);
var field = Reader.GetField(i);
dict.Add(propertyName, field);
}
}
return obj;
}
}
}
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