LocaleJsonAdapter.java

package org.fenixedu.bennu.core.api.json;

import java.util.Locale;

import org.fenixedu.bennu.core.annotation.DefaultJsonAdapter;
import org.fenixedu.bennu.core.json.JsonBuilder;
import org.fenixedu.bennu.core.json.JsonCreator;
import org.fenixedu.bennu.core.json.JsonUtils;
import org.fenixedu.bennu.core.json.JsonViewer;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

@DefaultJsonAdapter(Locale.class)
public class LocaleJsonAdapter implements JsonViewer<Locale>, JsonCreator<Locale> {
    @Override
    public JsonElement view(Locale locale, JsonBuilder ctx) {
        JsonObject object = new JsonObject();
        object.addProperty("tag", locale.toLanguageTag());
        object.addProperty("displayName", locale.getDisplayName(locale));
        object.addProperty("lang", locale.getLanguage());
        return object;
    }

    @Override
    public Locale create(JsonElement json, JsonBuilder ctx) {
        if (json.isJsonPrimitive()) {
            return new Locale.Builder().setLanguageTag(json.getAsString()).build();
        } else if (json.isJsonObject()) {
            JsonObject object = json.getAsJsonObject();
            return new Locale.Builder().setLanguageTag(JsonUtils.getString(object, "tag")).build();
        }
        return null;
    }
}