Newbe.ObjectVisitor Example 1

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We have added some scenarios and practice instructions that can be used to implement the functions of the library .

Transform the database link string into a data model , Or format the data model as a link string .

using System.Collections.Generic; using System.ComponentModel; using System.Linq; using System.Text; using FluentAssertions; using NUnit.Framework; namespace Newbe.ObjectVisitor.Tests { public class DataConnectionModelTest { public const string ConnectionStringValue = "Host=www.newbe.pro;Port=36524;Username=newbe36524;Password=newbe.pro;"; [Test] public void JoinToString() { var model = new DataConnectionModel { Host = "www.newbe.pro", Port = 36524, Username = "newbe36524", Password = "newbe.pro", }; var connectionString = model.ToString(); connectionString.Should().Be(ConnectionStringValue); } [Test] public void BuildFromString() { var model = DataConnectionModel.FromString(ConnectionStringValue); var expected = new DataConnectionModel { Host = "www.newbe.pro", Port = 36524, Username = "newbe36524", Password = "newbe.pro", }; model.Should().BeEquivalentTo(expected); } public class DataConnectionModel { public string Host { get; set; } = null!; public ushort? Port { get; set; } = null!; public string Username { get; set; } = null!; public string Password { get; set; } = null!; public int? MaxPoolSize { get; set; } = null!; private static readonly ICachedObjectVisitor<DataConnectionModel, StringBuilder> ConnectionStringBuilder = default(DataConnectionModel)! .V() .WithExtendObject<DataConnectionModel, StringBuilder>() .ForEach((name, value, sb) => AppendValueIfNotNull(name, value, sb)) .Cache(); private static void AppendValueIfNotNull(string name, object? value, StringBuilder sb) { if (value != null) { sb.Append($"{name}={value};"); } } public override string ToString() { var sb = new StringBuilder(); ConnectionStringBuilder.Run(this, sb); return sb.ToString(); } private static readonly ICachedObjectVisitor<DataConnectionModel, Dictionary<string, string>> ConnectionStringConstructor = default(DataConnectionModel)! .V() .WithExtendObject<DataConnectionModel, Dictionary<string, string>>() .ForEach(context => SetValueIfFound(context)) .Cache(); private static void SetValueIfFound( IObjectVisitorContext<DataConnectionModel, Dictionary<string, string>, object> c) { if (c.ExtendObject.TryGetValue(c.Name, out var stringValue)) { TypeConverter conv = TypeDescriptor.GetConverter(c.PropertyInfo.PropertyType); c.Value = conv.ConvertFrom(stringValue)!; } } public static DataConnectionModel FromString(string connectionString) { var dic = connectionString.Split(';') .Where(x => !string.IsNullOrEmpty(x)) .Select(x => x.Split('=')) .ToDictionary(x => x[0], x => x[1]); var re = new DataConnectionModel(); ConnectionStringConstructor.Run(re, dic); return re; } } } }

Replace the fields that meet the mobile phone number format in the object with ciphertext , Avoid sensitive information output .

using System.Text.RegularExpressions; using FluentAssertions; using NUnit.Framework; namespace Newbe.ObjectVisitor.Tests { public class ChangePasswordTest { [Test] public void CoverSensitiveDataTest() { // here is a model var userModel = new UserModel { Username = "newbe36524", Password = "newbe.pro", Phone = "12345678901" }; // create a data visitor to cover sensitive data var visitor = userModel.V() .ForEach<UserModel, string>(x => CoverSensitiveData(x)) .Cache(); visitor.Run(userModel); var expected = new UserModel { Username = "newbe36524", Password = "***", Phone = "123****8901", }; userModel.Should().BeEquivalentTo(expected); } private void CoverSensitiveData(IObjectVisitorContext<UserModel, string> c) { var value = c.Value; if (!string.IsNullOrEmpty(value)) { c.Value = Regex.Replace(value, "(\\d{3})\\d{4}(\\d{4})", "$1****$2"); } if (c.Name == nameof(UserModel.Password)) { c.Value = "***"; } } public class UserModel { public string Username { get; set; } = null!; public string Phone { get; set; } = null!; public string Password { get; set; } = null!; } } }

Will be realized  IEnumerable<int>  The sum of all properties of .

using System.Collections.Generic; using System.Linq; using FluentAssertions; using NUnit.Framework; namespace Newbe.ObjectVisitor.Tests { public class EnumerableTest { [Test] public void NameAndValue() { var model = new TestModel { List1 = new[] {1}, List2 = new[] {2}, List3 = new List<int> {3}, List4 = new HashSet<int> {4} }; var sumBag = new SumBag(); var visitor = model.V() .WithExtendObject(sumBag) .ForEach<TestModel, SumBag, IEnumerable<int>>((name, value, bag) => Sum(bag, value), x => x.IsOrImplOf<IEnumerable<int>>()) .Cache(); visitor.Run(model, sumBag); sumBag.Sum.Should().Be(10); } private static void Sum(SumBag bag, IEnumerable<int> data) { bag.Sum += data.Sum(); } public class SumBag { public int Sum { get; set; } } public class TestModel { public int[] List1 { get; set; } = null!; public IEnumerable<int> List2 { get; set; } = null!; public List<int> List3 { get; set; } = null!; public HashSet<int> List4 { get; set; } = null!; } } }

Release notes

• Newbe.ObjectVisitor 0.2.10 Release , More colorful
• Newbe.ObjectVisitor 0.1.4 Release , The initial release

Use samples

• Newbe.ObjectVisitor Examples 1

Share with others

• Looking for better performance dynamics Getter and Setter programme
• Looking for a smaller immutable dictionary with better performance

GitHub Project address ：https://github.com/newbe36524/Newbe.ObjectVisitor

Gitee Project address ：https://gitee.com/yks/Newbe.ObjectVisitor

 

• The author of this article ： newbe36524
• Link to this article ： https://www.newbe.pro/Newbe.ObjectVisitor/Example-1/
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