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// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.gerritforge.gerrit.eventbroker;
import com.google.common.base.Supplier;
import com.google.gerrit.entities.EntitiesAdapterFactory;
import com.google.gerrit.entities.Project;
import com.google.gerrit.server.events.Event;
import com.google.gerrit.server.events.EventDeserializer;
import com.google.gerrit.server.events.EventTypes;
import com.google.gerrit.server.events.ProjectNameKeyAdapter;
import com.google.gerrit.server.events.SupplierDeserializer;
import com.google.gerrit.server.events.SupplierSerializer;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.google.inject.Provider;
import java.lang.reflect.Type;
public class EventGsonProvider implements Provider<Gson> {
public static class EventSerializer implements JsonSerializer<Event> {
@Override
public JsonElement serialize(Event src, Type typeOfSrc, JsonSerializationContext context) {
String type = src.getType();
Class<?> cls = EventTypes.getClass(type);
if (cls == null) {
throw new JsonParseException("Unknown event type: " + type);
}
return context.serialize(src, cls);
}
}
public static class ProjectNameKeyDeserializer implements JsonDeserializer<Project.NameKey> {
@Override
public Project.NameKey deserialize(
JsonElement json, Type type, JsonDeserializationContext context) throws JsonParseException {
if (!json.isJsonPrimitive()) {
throw new JsonParseException("Not a primitive type");
}
JsonPrimitive jsonPrimitive = (JsonPrimitive) json;
if (!jsonPrimitive.isString()) {
throw new JsonParseException("Not a string");
}
return Project.nameKey(jsonPrimitive.getAsString());
}
}
@Override
public Gson get() {
return new GsonBuilder()
.registerTypeAdapter(Event.class, new EventDeserializer())
.registerTypeAdapter(Event.class, new EventSerializer())
.registerTypeAdapter(Supplier.class, new SupplierSerializer())
.registerTypeAdapter(Supplier.class, new SupplierDeserializer())
.registerTypeAdapter(Project.NameKey.class, new ProjectNameKeyAdapter())
.registerTypeAdapterFactory(EntitiesAdapterFactory.create())
.create();
}
}