Delphi. Serialization / Deserialization. XML / JSON

XML

OmniXML is a smart way to serialize smth.

First point, your objects should be derived from

TPersistent, TCollection or TCollection item.

Second point. Saved information should be in published section.

I do it like this

uses
OmniXML, OmniXMLPersistent

Saving


var
o : TSomeObject; // derived from TPersistent
...
TOmniXMLWriter.SaveToFile( o, 'c:\path\file.xml', pfAttributes, ofIndent );

Loading

TOmniXMLWriter.LoadFromFile( o, 'c:\path\file.xml' ); 

JSON

I use superobject library, example from github

  TTest = class // Field, Property Support
  private
    FB: String;
    FSubObj: TSubObj;
    FSubRec: TSubRec;
    FTestSets: TTestSets;
    FH: TDateTime;
    FJ: TDate;
    FK: TTime;
    FList: TObjectList<TSubObj>; // or TList<>; But only object types are supported
  public
    A: Integer;
    B: TTestSet;
    C: Boolean;
    property D: String read FB write FB;
    property E: TSubRec read FSubRec write FSubRec;
    property F: TSubObj read FSubObj write FSubObj;
    property G: TTestSets read FTestSets write FTestSets;
    property H: TDateTime read FH write FH;
    property J: TDate read FJ write FJ;
    property K: TTime read FK write FK;
    property L: TObjectList<TSubObj> read FList write FList;
  end;
  
  TTestRec = record // Only Field Support
    A: Integer;
    B: TTestSet;
    C: Boolean;
    D: String;
    E: TSubRec;
    F: TSubObj;
    G: TTestSets;
    H: TDateTime;
    J: TDate;
    K: TTime;
    L: TObjectList<TSubObj>; // or TList<>; But only object types are supported
  end;
  
  implementation
  ...
  
  var 
    Parse: TTest; // For Class;
    S: String;
  begin
    Parse := TTest.FromJSON('{"A": 1, "B": 0, "C": true, "D": "Hello", "E":{"A": 3, "B": "Delphi"}, "F": {"A": 4, "B": 5}, "G": [0,2], "H": "2014-05-03T03:25:05.059", "J": "2014-05-03", "K": "03:25:05", "L":[{"A": 4, "B": 5},{"A": 6, "B": 7}] }');
    S := Parse.AsJSON;
  end;
  
  
  ...
  var
    Parse: TTestRec; // For Record;
    S: String;
  begin
    Parse := TJSON.Parse<TTestRec>('{"A": 1, "B": 0, "C": true, "D": "Hello", "E":{"A": 3, "B": "Delphi"}, "F": {"A": 4, "B": 5}, "G": [0,2], "H": "2014-05-03T03:25:05.059", "J": "2014-05-03", "K": "03:25:05", "L":[{"A": 4, "B": 5},{"A": 6, "B": 7}]}');  
    S := TJSON.Stringify<TTestRec>(Parse);
  end;

Also fix by krapotkin

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