register custom TypeAdapters

[jbaron]

Would love a way to register Gson custom TypeAdapters so I can stick closer to my domain model for the data in the charts and don't require all types of transformations. Perhaps this is already possible, but couldn't find it in the documentation.

For example (I use Kotlin), Gson by default doesn't handle Pair, Triple, Instant and my own custom types.

BTW, I use the engine.renderJsonOption(chart) before sending it to the browser.

[jbaron]

Right now using my own Json rendering of the chart.option object, which also works fine. So not a high priority feature request.

[icepear-jzx]

EChartsSerializer will support custom adapters in the next release.

Example:

    public void testCustomEChartsSerializer() {
        EChartsSerializer serializer = new EChartsSerializer(new CustomObjectAdapter());
        Object object = new CustomObject("name");
        JsonElement actual = serializer.toJsonTree(object);
        JsonElement expected = JsonParser.parseString("'name'");
        assertEquals(expected, actual);
    }

    class CustomObject {
        private String name;

        public CustomObject(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }
    }

    class CustomObjectAdapter implements EChartsTypeAdapter<CustomObject> {
        public JsonElement serialize(CustomObject src, Type typeOfSrc, JsonSerializationContext context) {
            return context.serialize(src.getName());
        }

        public Type getType() {
            return CustomObject.class;
        }
    }

[jbaron]

Great, then I can use the EChartsSerializer which is a bit cleaner then doing my own serialisation (since I noticed ECharts-Java also has some own Adapters for more advanced chart types)