QuickLib

QuickLib is a delphi/Firemonkey(Windows, Linux, Android, OSX & IOS) and fpc(Windows & Linux) library containing interesting and quick to implement functions, created to simplify application development and crossplatform support and improve productivity. Delphi XE8 - Delphi 12 Athens supported.

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Areas of functionality:

• Mapping: Map fields from a class to other class, copy objects, etc..
• Config: Use your config as an object and load/save from/to file (Json/Yaml) or Windows Registry.
• Serialization: Serialize objects to/from json/Yaml.
• Scheduling: Schedule tasks launching as independent threads with retry policies.
• Threading: Simplify run and control of multithread background tasks, Thread-safe Lists, queues, etc
• Data: Flexible data interchange and storage, allowing several input-output types.
• Cloud: Simplify cloud Azure/Amazon file management, send emails and more.
• Querying: Indexed Lists, Searchable Lists and Linq query system for generic lists and arrays.
• Benchmark: Time elapsed control and benchmark functions.
• Filesystem: Process and Services control, file modify monitors and helpers, etc...
• FailControl: Fail and Retry policies.
• Caching:: Cache string or objects to retrieve fast later.
• Templating: Simple string templating with dictionaries.
• Debuging: Utils to debug your code.
• Parameters: Work with commandline parameters.

Main units description:

• Quick.Commons: Functions frequently needed in the day to day of a developer.
• Quick.AppService: Allow a console app to run as console mode or service mode with same code simplifying debug tasks.
• Quick.Azure/Amazon: Simplifies blob iteraction with Azure and Amazon Cloud Storage.
• Quick.Network: CIDR and IP Range functions.
• Quick.Chrono: Chronometer and Benchmark a piece of code is simple.
• Quick.Console: Write log messages to console with colors and more...
• Quick.Log: Log to disk or memory with verbose levels and daily or max space rotation.
• Quick.Config: Load/Save a config as Json or Yaml file or Windows Registry keys and manage it as an object.
• Quick.FileMonitor: Monitorizes a file for changes and throws events.
• Quick.JsonUtils: Utils for working with json objects.
• Quick.SMTP: Send email with two code lines.
• Quick.Threads: Thread safe classes, scheduling and backgrounds tasks with retry policies.
• Quick.Process: Manages windows processes.
• Quick.Services: Manages windows services.
• Quick.Format: String format.
• Quick.RTTI.Utils: Simplifies working with RTTI.
• Quick.JsonSerializer: Serializes an object from/to json text. You can define if public or published will be processed (only Delphi, fpc rtti only supports published properties)
• Quick.AutoMapper: Map fields from one class to another class. Allows custom mappings to match different fields and custom mapping procedure to cast/convert fields manually.
• Quick.JsonRecord: Used as a DTO class, with json serialize and mapping functions included.
• Quick.Lists: Improved lists with indexing or search features.
• Quick.Value FlexValue stores any data type and allow pass to other class with integrated operators and autofrees.
• Quick.Arrays: Improved arrays.
• Quick.YAML: Yaml object structure.
• Quick.YAML.Serializer: Serialize/Deserialize object from/to Yaml.
• Quick.Expression: Evaluate object properties using expressions.
• Quick.Linq: Makes Linq queries to any TObjectList, TList, TArray and TXArray, performing Select by complex Where like SQL syntax, update and order over your list.
• Quick.MemoryCache: Caches objects/info with an expiration time, to avoid generate this info everytime is needed (database queries, hard to calculate info, etc).
• Quick.Collections: Collections improvements like IList and IObjectList with Linq inherited.
• Quick.Pooling: Creation of object pool to avoid external resource consum exhausts and overheads.
• Quick.Template: String template replacing with dictionary or delegate.
• Quick.Debug.Utils: Simple debugging and code benchmark utils.
• Quick.Parameters: Work with commandline parameters like a class.
• Quick.Url.Utils: Simple url manipulation
• Quick.RegEx.Utils: Commonly used RegEx comparison (email verification, password complexity, etc)
• Quick.Conditions: Pre and postcondition validations in fluent style.

Updates:

• NEW: RAD Studio 12 supported
• NEW: RAD Studio 11 supported
• NEW: Condition checks
• NEW: Commonly used RegEx validations
• NEW: Url manipulation utils
• NEW: QuickParameters to work with commandline arguments like a class.
• NEW: HttpServer custom and dynamic error pages.
• NEW: Debug utils
• NEW: String Template
• NEW: RAD Studio 10.4 supported
• NEW: Collections: IList and IObjectList with linQ support.
• NEW: Pooling: ObjectPool.
• NEW: Options file settings with sections.
• NEW: MemoryCache with expiration & object compression.
• NEW: Now included on RAD Studio GetIt package manager.
• NEW: Background & Scheduled task with retry policies
• NEW: RunTask, FaultControl
• NEW: Linq over generic lists and arrays.
• NEW: QuickConfig YAML provider.
• NEW: YAML Object and Serializer
• NEW: AutoMapper customapping path namespaces style.
• NEW: FlexArray, FlexPair & FlexPairArray.
• NEW: AutoMapper mapping procedures (see documentation below)
• NEW: JsonSerializer improved
• NEW: TXArray: array like TList
• NEW: Delphi Linux compatibility
• NEW: QuickConfigJson reload if config file changed
• NEW: First version with OSX/IOS partial support
• NEW: Delphinus-Support

• From package managers:

1. Search "QuickLib" on Delphinus or GetIt package managers and click Install

• From Github:

1. Clone Github repository or download zip file and extract it.
2. Add QuickLib folder to your path libraries on Delphi IDE.

Allow a console app to run as console mode or service mode with same code simplifying debug tasks.

if not AppService.IsRunningAsService then
begin
    ...your code running as console
end
else
begin
    AppService.ServiceName := 'MyService';
    AppService.DisplayName := 'MyServicesvc';
    //you can pass an anonymous method to events
    AppService.OnStart := procedure
                          begin
                            ...your start code
	                      end;
    AppService.OnExecute := YourExecuteFunction;
    AppService.OnStop := YourStopFunction;
    AppService.CheckParams;
end;

Simplifies blob iteraction with Azure and Amazon Cloud Storage.

//connect to a Azure blobstorage
QuickAzure := TQuickAzure.Create(AzureAccountName,AzureAccountKey);

//download a blob file to a stream
done := QuickAzure.GetBlob('MyContainer','MyFile.jpg',ResponseInfo,MyStream);
    
//check if exists a folder
found := ExistFolder('MyContainer','/Public/Documents/Personal');
    
//list blobs starting with a pattern (recursively or not)
for azBlob in ListBlobs('MyContainer','/Public/Documents',Recursive,ResponseInfo) do
begin
    if azBlob.Size > 1000 then Showmessage(azBlob.Name);
end;

CIDR and IP Range functions.

//convert ip string to integer
IPv4ToInt('192.168.1.10');

//get first and last ip of a subnet scope
GetIpRange('192.168.100.0','255.255.255.0',LowIp,HighIP);

Functions frequently needed in the everyday of a developer.

//coverts UTC time TDateTime to Local date time
UTCToLocalTime(MyUTCTime);
    
//generate a 10 char length random password with alfanumeric and signs.
RandomPassword(10,[pfIncludeNumbers,pfIncludeSigns]);

//Capitalize every word of a phrase
CapitalizeAll('the grey fox'); //returns "The Grey Fox"

//Simple TCounter and TTimeCounter for loops
counter := TCounter;
counter.Init(200);
timecounter : TTimeCounter;
timecounter.Init(10000);
while true do
begin
    Inc(n);
    {your procedural process here}
    //every 200 steps writes to console
    if counter.Check then writeln(Format('Processed %d entries',[n]));
    //every 10 seconds writes to console
    if timecounter.Check then writeln('Im working...'); 
end;

Chronometer and Benchmark a piece of code is simple.

//get elapsed time execution of a code part
Chrono := TChronometer.Create(False);
Chrono.Start;
...code you need benchmark
Chrono.Stop;

//shows elapsed time in LongTime format (2 hour(s) and 10 minute(s))
Showmessage(Chrono.TimeElapsed(True));

//shows elapsed time in ShortTime format (02:10:00)
Showmessage(Chrono.TimeElapsed(False));
//get benchmak info of a process
Chrono := TChronoBenchMark.Create;
Chrono.TotalProcess := 100000;
for i := 1 to 10000 do
begin
    {your process here}
    Chrono.CurrentProcess := i;
    //shows estimated time your process will take in x hour(s), x minute(s) x second(s) format
    writeln(Chrono.EstimatedTime(True));
    //shows speed: num items per second processed of your process
    writeln(Format('Items processed %d/sec',[Chrono.Speed]));
end;
writeln(Chrono.ElapsedTime(False)); //shows total time elapsed in 00:00:00 format

Write log messages to console with colors and more...

//define which level of output needed
Console.Verbose := LOG_DEBUG;

//writes line to console in red color
cout('Error x',etError); 

//writes formatted line in green color
coutFmt('Proccess %s finished',[ProccesName],etSuccess);

//writes integer
cout(12348);

//Connect a QuickLog and write to disk and screen with one line of code (with independent verbose levels)
MyQuickLog := TQuickLog.Create;
MyQuickLog.Verbose := LOG_ALL;
Console.Verbose := LOG_ONLYERRORS;
Console.Log := MyQuickLog;

Log to disk or memory with verbose levels and daily or max space rotation.

//write a header on start with info as running path, appname, debugmode, user, etc...
Log.ShowHeader := True;

//sets log with rotation at 20MB
Log.SetLog('.mylog.log',False,20);

//write an error message
Log.Add('Error x',etError);

//write formatted error message
Log.Add('Error is %s',[ErrorStr],etError);

Load/Save a config as Json or Yaml file or Windows Registry keys. Create a descend class from TAppConfigJson, TAppConfigYaml or TAppConfigRegistry and added published properties will be loaded/saved. Files configs can be reloaded on detect files changes.

//create a class heritage
TMyConfig = class(TAppConfigJson)
private
    fName : string;
    fSurname : string;
    fStatus : Integer;
published
    property Name : string read fName write fName;
    property SurName : string read fSurname write fSurname;
    property Status : Integer read fStatus write fStatus;
end;

//create your config to json file
//Add Quick.Config.Json to your uses
MyConfig := TMyConfig.Create('Config.json');
MyConfig.Provider.CreateIfNotExists := True;
MyConfig.Provider.ReloadIfFileModified := True;
MyConfig.Name := 'John';
MyConfig.Surname := 'Smith';
//load
MyConfig.Load;
//save
MyConfig.Save;
  
//create your config to Windows Registry
//Add Quick.Config.Registry to your uses
MyConfig := TMyConfig.Create;
//Define Registry as HKEY_CURRENT_USERSoftwareMyApp
MyConfig.HRoot := HKEY_CURRENT_USER; 
MyConfig.MainKey := 'MyApp';
MyConfig.Name := 'John';
MyConfig.Surname := 'Smith';
//load
MyConfig.Load;
//save
MyConfig.Save;

//Create a custom Config with no default provider
TMyConfig = class(TAppConfig)
...your properties
end;

MyConfig := TMyConfig.Create(TAppConfigJsonProvider.Create('.config.json');

Monitorizes a file for changes and throws events.

FileMonitor.Filename := '.myfile.txt';
//check file changes every 2 seconds
FileMonitor.Interval := 2000;
//watch for deleted or modified file events
FileMonitor.Notifies := [mnFileModified, mnFileDeleted)];
FileMonitor.OnFileChange := MyFileChangeFunction;
FileMonitor.Enabled := True;

Utils for working with json objects.

//When unit declared in uses, a TObject Helper allows all your objects to be loaded or saved to/from json string
MyObject.FromJson := jsonstring;
MyString := MyObject.ToJson;

//You can clone simple objects with clone function
MyObject1.Clone(MyObject2);

Send email with two code lines.

//Send email
SMTP := TSMTP.Create('mail.domain.com',25,False);
SMTP.SendMail('my@email.com','to@email.com','Email subject','My message body');

//You can define more advanced options
SMTP.SenderName := 'John';
SMTP.From := 'my@email.com';
SMTP.Recipient := 'one@email.com,two@email.com';
SMTP.Subject := 'Email subject';
SMTP.AddBodyFromFile := '.body.html';
SMTP.CC := 'other@email.com';
SMTP.BCC := 'more@email.com';
SMTP.Attachments.Add('.notes.txt');
SMTP.SendMail;

Thread safe classes.

TThreadedQueueCS: Version of TThreadedQueue with Critical Section.

TThreadObjectList: Thread safe Object List.

TThreadedQueueList: Thread safe Queue List. Autogrow and with Critical Section.

TAnonymousThread: Creates anonymous thread defining unchained Execute and OnTerminate methods. Use Execute_Sync and OnTerminate_Sync methods if code needs to update UI.

• Execute: Specify code to execute on start.
• Execute_Sync: Like Execute but runs code with syncronized thread method (avoids problems if your code updates UI).
• OnTerminate: Specify code to execute when task finishes.
• OnTerminate_Sync: Like OnTerminate but runs code with syncronized thread method (avoids problems if your code updates UI).
• Start: Starts thread execution.

//simple anonymousthread
TAnonymousThread.Execute(
      procedure
      var
        i : Integer;
      begin
        for i := 0 to 10 do cout('Working %d',[i],etTrace);
        cout('executed thread',etSuccess);
      end)
    .OnTerminate(
      procedure
      begin
        cout('terminated thread',etSuccess);
        cout('PRESS  TO EXIT',etInfo);
      end)
    .Start;

TRunTask: Launch an autofree single task thread with fault & retry control policies. Params can be passed and created into code.

• Define code to execute:
  • Execute: Specify Task name, parameters to pass to anonymous method(If OwnedParams=true, task will free params on termination task) and method than will be executed.
  • Execute_Sync: Like Execute but runs code with synchronize thread method (avoids problems if your code updates UI).
  • SetParameter: Defines values or objects needed by your task.
• Define events to control:
  • OnInitialize: Specify code to run before main execute task (this code only runs one time, OnExecute can be retried more than one time)
  • OnRetry: Specify code to run when execution fails and decide if needs to retry or cancel next retries.
  • OnTerminate: Specify code to execute when task finishes.
  • OnTerminate_Sync: Like OnTerminate but runs code with syncronized thread method (avoids problems if your code updates UI).
  • OnException: Specify code to execute when task generates an exception.
• Define fail/retry policies:
  • RetryForever: If execution fails, code will be retry forever until task executes ok.
  • Retry: If execution fails, code will be retry x times.
  • WaitAndRetry: If execution fails, code will be retry x times, and wait x millisecons before each retry. You can specify number of retries and wait time between retries.
  • Run: Starts task execution.

  TRunTask.Execute(
      procedure(task : ITask)
      var
        stream : TStringStream;
        response : IHttpRequestResponse;
      begin
        stream := TStringStream.Create;
        try
          response := TJsonHttpClient(task['httpclient'].AsObject).Get(task['url']);
          task.Result := response.StatusCode;
          if response.StatusCode <> 200 then raise Exception.Create(response.StatusText);
        finally
          stream.Free;
        end;
      end)
    .SetParameter('httpclient',(TJsonHttpClient.Create),True)
    .SetParameter('url','https://mydom*ain.**com/testfile')
    .WaitAndRetry(5,250,2)
    .OnRetry(
      procedure(task : ITask; aException : Exception; var vStopRetries : Boolean)
      begin
        //if error 404 don't try to retry request
        if task.Result = 404 then vStopRetries := True;
      end)
    .OnException(
      procedure(task : ITask; aException : Exception)
      begin
        coutFmt('Exception downloading (Error: %s / StatusCode: %d)...',[aException.Message,task.Result.AsInteger],etError);
      end)
    .OnTerminated(
      procedure(task : ITask)
      begin
        if task.Done then coutFmt('Download "%s" finished ok',[task['url'].AsString],etSuccess)
          else coutFmt('Download "%s" failed after %d retries',[task['url'].AsString,task.NumRetries],etError);
      end)
    .Run;

TBackgroundsTasks: Launch tasks in background allowing number of concurrent workers with fault and retry control policies. Use AddTask_Sync and OnTerminate_Sync methods if code needs to update UI.

• Add a task to execute:
  • AddTask: Specify Task name, parameters to pass to anonymous method(If OwnedParams=true, task will free params on expiration task) and method than will be executed.
  • AddTask_Sync: Like AddTask but runs code with synchronize thread method (avoids problems if your code updates UI).
  • SetParameter: Defines values or objects needed by your task. Every parameter will be accesible into anomymous methods defines as task[] or task.[index]
• Define events to control:
  • OnInitialize: Specify code to run before main execute task (this code only runs one time, OnExecute can be retried more than one time)
  • OnRetry: Specify code to run when execution fails and decide if needs to retry or cancel next retries.
  • OnTerminate: Specify code to execute when task finishes.
  • *OnTerminate_Sync: Like OnTerminate but runs code with syncronized thread method (avoids problems if your code updates UI).
  • OnException: Specify code to execute when task generates an exception.
• Define fail/retry policies:
  • RetryForever: If execution fails, code will be retry forever until task executes ok.
  • Retry: If execution fails, code will be retry x times. Allow define array of milliseconds as wait time.
  • WaitAndRetry: If execution fails, code will be retry x times, and wait x millisecons before each retry. You can specify number of retries and wait time between retries.
• Begin execution:
  • Start: Starts tasks execution.

    backgroundtasks := TBackgroundTasks.Create(10);
    for i := 1 to 100 do
    begin
      mytask := TMyTask.Create;
      mytask.Id := i;
      mytask.Name := 'Task' + i.ToString;
      backgroundtasks.AddTask([mytask],False,
                              procedure(task : ITask)
                              begin
                                cout('task %d started',[TMyTask(task.Param[0].AsObject).Id],etDebug);
                                TMyTask(task.Param[0].AsObject).DoJob;
                              end
							).WaitAndRetry([250,2000,10000])
                            ).OnException(
                              procedure(task : ITask; aException : Exception)
                              begin
                                cout('task %d failed (%s)',[TMyTask(task.Param[0].AsObject).Id,aException.Message],etError);
                              end
                            ).OnTerminated(
                              procedure(task : ITask)
                              begin
                                cout('task %d finished',[TMyTask(task.Param[0].AsObject).Id],etDebug);
                                TMyTask(task.Param[0].AsObject).Free;
                              end
                            ).Run;
    end;
    backgroundtasks.Start;

TScheduledTasks: Alternative to Timer. You can assign tasks with start time, repeat options and expiration date and fail and retry control policies. Use AddTask_Sync, OnTerminate_Sync and OnExpired_Sync if code needs to update UI. You can assign anonymous methods to execute, exception, terminate and expiration events.

• Add a task to execute:
  • AddTask: Specify Task name, parameters to pass to anonymous method(If OwnedParams=true, task will free params on expiration task) and method than will be executed.
  • AddTask_Sync: Like AddTask but runs code with synchronize thread method (avoids problems if your code updates UI).
  • SetParameter: Defines values or objects needed by your task. Every parameter will be accesible into anomymous methods defines as task[] or task.[index]
• Define events to control:
  • OnInitialize: Specify code to run before main execute task (this code only runs one time, OnExecute can be retried more than one time)
  • OnRetry: Specify code to run when execution fails and decide if needs to retry or cancel next retries.
  • OnTerminate: Specify code to execute when task finishes.
  • OnTerminate_Sync: Like OnTerminate but runs code with syncronized thread method (avoids problems if your code updates UI).
  • OnExpire: Specify code to execute when task expiration reached or task was cancelled.
  • OnExpire_Sync: Like OnExpire but runs code with synchronized thread method (avoids problems if your code updates UI).
  • OnException: Specify code to execute when task generates an exception.
• Define when to start task:
  • StartNow: Start task immediately.
  • StartAt: Date and time to start task.
  • StartTodayAt: Start task today at defined time.
  • StartTomorrowAt: Start task tomorrow at defined time.
  • StartOnDayChange: Start task when day changes.
  • StartInMinutes: Start task after x minutes.
  • StartInSeconds: Start task after x seconds.
• Define if needs to repeat or not (if not defined a previous StartAt, StartOn, etc, task will be executed immediately):
  • RunOnce: Task will be executed one time only.
  • RepeatEvery: Can indicate repeat step over time and expiration date.
  • RepeatEveryDay: Repeat task every day at same hour.
  • RepeatEveryWeek: Repeat task every week at same hour.
• Define fail/retry policies:
  • RetryForever: If execution fails, code will be retry forever until task executes ok.
  • Retry: If execution fails, code will be retry x times.
  • WaitAndRetry: If execution fails, code will be retry x times, and wait x millisecons before each retry. You can specify number of retries and wait time between retries.
• Start/Stop scheduler:
  • Start: Starts scheduler.
  • Stop: Stops scheduler.

myjob := TMyJob.Create;
myjob.Name := Format('Run at %s and repeat every 1 second until %s',[DateTimeToStr(ScheduledDate),DateTimeToStr(ExpirationDate)]);
scheduledtasks.AddTask('Task1',[myjob],True,
                            procedure(task : ITask)
                            begin
                              cout('task "%s" started',[TMyTask(task.Param[0]).Name],etDebug);
                              TMyJob(task.Param[0]).DoJob;
                            end
                          ).OnException(
                            procedure(task : ITask; aException : Exception)
                            begin
                              cout('task "%s" failed (%s)',[TMyJob(task.Param[0]).Name,aException.Message],etError);
                            end
                          ).OnTerminated(
                            procedure(task : ITask)
                            begin
                              cout('task "%s" finished',[TMyJob(task.Param[0]).Name],etDebug);
                            end
                          ).OnExpired(
                            procedure(task : ITask)
                            begin
                              cout('task "%s" expired',[TMyJob(task.Param[0]).Name],etWarning);
                            end
                          ).StartAt(ScheduledDate
                          ).RepeatEvery(1,TTimeMeasure.tmSeconds,ExpirationDate);
scheduledtasks.Start;

• ITask: Interface passed to every task event of TRunTask, TBackgroundTasks and TScheduledTasks.
  • NumWorker: Return number of worker assigned to execute task.
  • Result: Can store any value type (TFlexValue is like variant type)
  • Param[name]: Can store parameters passed to task or created dynamically into every anonymous methods passed to each event.
  • Param[index]: Can store parameters passed to task or created dynamically into every anonymous methods passed to each event.
  • Done: Return true is task is executed without errors.
  • Failed: Return true is task has failed.
  • IdTask: Task id defined.
  • NumRetries: Number of retries done.
  • MaxRetries: Number of maximum retries allowed before mark task as failed.
  • LastException: Return last exception of a failed task.
  • CircuitBreaked: Return true if max retries has been reached or user cancelled into OnRetry event.
  • IsEnabled: Return status of task.

Manages fail and retry policies, defining max retries, wait time beetween retries and circuit break mecanism.

Manages windows processes.

//kill explorer process
KillProcess('explorer.exe');
//determine if an application is running
if IsProcessRunning('explorer.exe') then Showmessage('Explorer is running!');
//get username who is running an exe
writeln('Explorer.exe open by: ' + GetProcessUser('explorer.exe');
//gets handle of a window with a 20 seconds timeout
if FindWindowTimeout('MainWindow',20) then writeln('Window detected');

Manages windows services.

//detect if a service is installed
if not ServiceIsPresent('localhost','MySvc') then raise Exception.Create('Service not installed!');
//Start a service
ServiceStart('localhost','MySvc');
//Uninstall a service
ServiceUninstall('MySvc');

String format.

//Format bytes to MB, GB, TB...
FormatBytes(50000) //shows 50KB
FormatBytes(90000000) //shows 90MB

Serializes an object from/to json text. You can define if public or published will be processed (only Delphi, fpc rtti only supports published properties)

json := '{"name":"Peter","age":30}';
serializer := TJsonSerializer.Create(TSerializeLevel.slPublishedProperty);
try
   serializer.JsonToObject(user,json);
finally
   serializer.Free;
end;

Map fields from one class to another class. Allows custom mappings to match different fields and custom mapping procedure to cast/convert fields manually.

//Map values from User1 to User2
TMapper.Map(User);

//Map custom mappings
AutoMapper := TAutoMapper.Create;

//option1: you can define auto map different named properties
AutoMapper.CustomMapping.AddMap('Cash','Money');
AutoMapper.CustomMapping.AddMap('Id','IdUser');

//option2: you can decide to modify each property manually or allow to auto someones
AutoMapper.OnDoMapping := procedure(const aSrcObj : TUser; const aTargetName : string; out Value : TFlexValue)
                          begin
                            if aTargetName = 'Money' then Value := aSrcObj.Cash * 2
                              else if aTargetName = 'IdUser' then Value := aSrcObj.Id;
                          end;

//option3: you can modify some properties after automapping done
AutoMapper.OnAfterMapping := procedure(const aSrcObj : TUser; aTgtObj : TUser2)
                             begin
                               aTgtObj.Money := aSrcObj.Cash * 2;
                               aTgtObj.IdUser := aSrcObj.Id;
                             end;

User2 := AutoMapper.Map(User);

Used as a DTO class, with json serialize and mapping functions included.