VersaTul.Collection.Streamers 1.0.29

VersaTul Collection Streamers

VersaTul Collection Streamers is a library that provides functionality to quickly convert a collection of objects in memory into a data-reader that can be used for bulk inserting data into a SQL Database, or be used to generate flat files. It also works with display attributes to manipulate the properties on the objects in the collection.

Features

• Convert from a data-reader to other file formats such as CSV, TAB or JSON
• Use display attributes to format or rename the properties
• Send streamers via email attachments
• Save streamers to physical files on disk
• Compress streamers for transport over the network
• Convert any collection to an IDataReader

Installation

To use VersaTul Collection Streamers, first install it using nuget:

PM> NuGet\Install-Package VersaTul.Collection.Streamers -Version latest

Usage

The library provides several interfaces and classes to create and manipulate streamers. Here are some of the main ones:

• IStreamer: A base interface that represents the data contained in the stream and the functionality that can be applied to the data.
• IStreamCreator: A base interface that represents the functionality for creating streamers.
• ICsvStreamer: A specific stream type interface that represents the functionality for creating csv streamers.
• ITabStreamer: A specific stream type interface that represents the functionality for creating tab streamers.
• IJsonStreamer: A specific stream type interface that represents the functionality for creating json streamers.
• BaseStreamer: A concrete implementation of the IStreamer and IStreamCreator interfaces. Providing common functionality for all streamers.
• CsvStreamer: A concrete implementation of the ICsvStreamer interface.
• JsonStreamer: A concrete implementation of the IJsonStreamer interface.
• TabStreamer: A concrete implementation of the ITabStreamer interface.
• IMailTransporter: Represents a set of functionality to send streamers via email attachments.
• IStreamFileConverter: Represent a set of conversion techniques that can be applied to a streamer.
• ICompressTransport: Represents a set of functionality to reduce streamers for transport over the network.
• CollectionReaderExtensions: Contains the ToReader method that can be used to convert any collection to an IDataReader.

Here is a simple example of using the CsvStreamer to create a csv file from a collection of Person objects:

using VersaTul.Collection.Streamers;
using VersaTul.Collection.Streamers.Compressions;
using VersaTul.Collection.Streamers.Converters;
using VersaTul.Compression;
using VersaTul.Handler.File;
using VersaTul.Object.Converters;
using VersaTul.Utilities;

namespace CollectionStreamers
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create N number of data model
            var people = GetPeople(1000);

            // Create Needed Instances
            var iOWrapper = new IOWrapper();
            var utility = new CommonUtility();
            var handler = new FileHandler(iOWrapper, iOWrapper);
            var flattener = new Flattener();
            var zipper = new Zipper(new Archiver());
            var compressor = new Compressor(zipper);
            var fileUtil = new FileUtility(handler, iOWrapper);
            var fileConvert = new FileConverter(fileUtil, handler, compressor);

            // Creating the CsvStreamer Instance
            var csvStreamer = new CsvStreamer(utility, handler, flattener);

            // Create CSV from given people collection
            var csv = csvStreamer.Create(people, "people");

            // Save csv to Path
            fileConvert.Save(csv, "C:\\your\\file\\path\\here\\", false);
        }

        // Helper method for generating list of data model.
        private static IEnumerable<Person> GetPeople(int amount)
        {
            var people = new List<Person>(amount);
            var names = new[] { "John Doe", "Jane Smith", "Susan Williams", "Mike Burger", "Joe Williams", "Timmy Smith", "Lisa Ray", "Stanley Smith", "Sam Jones", };

            for (int i = 0; i < amount; i++)
            {
                people.Add(new Person
                {
                    Age = i + 10,
                    Name = CommonUtil.RandomSampler(names),
                    AccountBalance = (100.99m * i),
                    BestFriend = CommonUtil.RandomSampler(people)
                });
            }

            return people;
        }
    }

    // Data Model
    public class Person
    {
        public int Age { get; set; }
        public string? Name { get; set; }
        public decimal AccountBalance { get; set; }
        public IEnumerable<Person>? Friends { get; set; }
        public Person? BestFriend { get; set; }
    }

    // Helper class
    public static class CommonUtil
    {
        public static T? RandomSampler<T>(IList<T> source)
        {
            var max = source.Count;
            if (max == 0) return default;
            var rand = new Random();
            var position = rand.Next(max);
            return source[position];
        }
    }
}

License

This project is licensed under the MIT License - see the LICENSE file for details.