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JsonDataObjects
This Delphi unit contains a JSON parser that supports Delphi 2009-10Seattle and the platforms Win32, Win64 and ARM Android (MacOS and iOS may work).
Clone with GIT
> git clone git@github.com:ahausladen/JsonDataObjects.git
or
> git clone https://github.com/ahausladen/JsonDataObjects.git
This will get you the Json Data Objects repository.
How to install
Clone the JsonDataObjects repository
Add the JsonDataObjects.pas unit to your project.
Features
Fast dual JSON parser for parsing UTF8 and UTF16 without conversion
Automatic creation of arrays and objects
Easy access mode with implicit operators
Compact and formatted output modes
Variants support
Null can be auto-typecasted to a value type if JsonSerializationConfig.NullConvertsToValueTypes is set to True
Progress callback support for loading large JSON strings
Win32, Win64 and ARM Android support (MacOS and iOS may work)
Usage
Simple example
var
Obj: TJsonObject;
begin
Obj := TJsonObject.Parse('{ "foo": "bar", "array": [ 10, 20 ] }') as TJsonObject;
try
ShowMessage(Obj['foo']);
ShowMessage(IntToStr(Obj['array'].Count));
ShowMessage(IntToStr(Obj['array'].Items[0]));
ShowMessage(IntToStr(Obj['array'].Items[1]));
finally
Obj.Free;
end;
end;
Filling and serializing JSON objects
var
Obj, ChildObj: TJsonObject;
begin
Obj := TJsonObject.Create;
try
// easy access
Obj['foo'] := 'bar';
// normal (and faster) access
Obj.S['bar'] := 'foo';
// automatic array creation, Obj is the owner of 'array'
Obj.A['array'].Add(10);
Obj.A['array'].Add(20);
// automatic object creation, 'array' is the owner of ChildObj
ChildObj := Obj.A['array'].AddObject;
ChildObj['value'] := 12.3;
// automatic array creation, ChildObj is the owner of 'subarray'
ChildObj.A['subarray'].Add(100);
ChildObj.A['subarray'].Add(200);
ShowMessage(Obj.ToJSON({Compact:=}False));
finally
Obj.Free;
end;
{
"foo": "bar",
"bar": "foo",
"array": [
10,
20,
{
"value": 12.3,
"subarray": [
100,
200
]
}
]
}
Copying JSON objects with Assign
var
Obj, ClonedObj: TJsonObject;
begin
Obj := TJsonObject.ParseUtf8('{ "foo": [ "bar", {}, null, true, false, { "key": "value" } ] }') as TJsonObject;
try
ClonedObj := TJsonObject.Create;
try
// Make a copy of Obj
ClonedObj.Assign(Obj);
ShowMessage(ClonedObj.ToJSON(False));
finally
ClonedObj.Free;
end;
finally
Obj.Free;
end;
end;
{
"foo": [
"bar",
{},
null,
true,
false,
{
"key": "value"
}
]
}