Gson 2.0 Release

[Joel]

I am happy to announce the latest release of Gson. Drumroll
please.....Gson 2.0 is now available to the public. The major version
change is due to some minor backward incompatible changes. Please see
release notes below for more information.

Please try it out an let the team know what you think.

Enjoy!

------------------------------------------------------------

RELEASE NOTES:

Faster:
Previous versions first parsed complete document into a DOM-style
model (JsonObject or JsonArray) and then bound data against that. Gson
2 does data binding directly from the stream parser.

More Predictable:
Objects are serialized and deserialized in the same way, regardless of
where they occur in the object graph.

------------------------------
Changes to watch out for:
Gson 1.7 would serialize top-level nulls as "". 2.0 serializes them as
"null".
String json = gson.toJson(null, Foo.class);
1.7: json == ""
2.0: json == "null"

Gson 1.7 permitted duplicate map keys. 2.0 forbids them.
String json = "{'a':1,'a':2}";
Map<String, Integer> map = gson.fromJson(json, mapType);
1.7: map == {a=2}
2.0: JsonSyntaxException thrown

Gson 1.7 won’t serialize subclass fields in collection elements. 2.0
adds this extra information.
List<Point2d> points = new ArrayList<Point2d>();
points.add(new Point3d(1, 2, 3));
String json = gson.toJson(points,
new TypeToken<List<Point2d>>() {}.getType());
1.7: json == "[{'x':1,'y':2}]"
2.0: json == "[{'x':1,'y':2,'z':3}]"

Gson 1.7 binds single-element arrays as their contents. 2.0 doesn’t.
Integer i = gson.fromJson("[42]", Integer.class);
1.7: i == 42
2.0: JsonSyntaxException thrown


------------------------------
Other changes to be aware of:
Gson 2.0 doesn’t support type adapters for primitive types.

Gson 1.7 uses arbitrary precision for primitive type conversion (so
-122.08e-2132 != 0). Gson 2.0 uses double precision (so -122.08e-2132
== 0).

Gson 1.7 sets subclass fields when an InstanceCreator returns a
subclass when the value is a field of another object. Gson 2.0 sets
fields of the requested type only.

Gson 1.7 versioning never skips the top-level object. Gson 2.0
versioning applies to all objects.

Gson 1.7 truncates oversized large integers. Gson 2.0 fails on them.

Gson 2.0 permits integers to have .0 fractions like "1.0".

Gson 1.7 throws IllegalStateException on circular references. Gson 2.0
lets the runtime throw a StackOverflowError.

[Mike S]

Great news. Will this be uploaded to the maven central repo?

[Inderjeet Singh]

Yes, it has been updated to Maven Central.

On Sunday, November 13, 2011 3:34:21 PM UTC-8, Mike S wrote:

Great news. Will this be uploaded to the maven central repo?

[Maxim Yudin]

Awesome news, I use Gson in my company project for Android app, today I try to use 2.0 version :)

[David]

Great news, will download and test ASAP!

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[gorlok]

Thanks! It solved some problems for me, with complex objects. It works
great.