| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.twill.internal.json; |
| |
| import com.google.common.collect.ImmutableMultimap; |
| import com.google.common.io.InputSupplier; |
| import com.google.common.io.OutputSupplier; |
| import com.google.common.reflect.TypeToken; |
| 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.JsonObject; |
| import com.google.gson.JsonParseException; |
| import com.google.gson.JsonSerializationContext; |
| import com.google.gson.JsonSerializer; |
| import org.apache.twill.internal.Arguments; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.Writer; |
| import java.lang.reflect.Type; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Gson codec for {@link Arguments}. |
| */ |
| public final class ArgumentsCodec implements JsonSerializer<Arguments>, JsonDeserializer<Arguments> { |
| |
| private static final Gson GSON = new GsonBuilder().registerTypeAdapter(Arguments.class, new ArgumentsCodec()) |
| .create(); |
| |
| public static void encode(Arguments arguments, OutputSupplier<? extends Writer> writerSupplier) throws IOException { |
| try (Writer writer = writerSupplier.getOutput()) { |
| GSON.toJson(arguments, writer); |
| } |
| } |
| |
| |
| public static Arguments decode(InputSupplier<? extends Reader> readerSupplier) throws IOException { |
| try (Reader reader = readerSupplier.getInput()) { |
| return GSON.fromJson(reader, Arguments.class); |
| } |
| } |
| |
| @Override |
| public JsonElement serialize(Arguments src, Type typeOfSrc, |
| JsonSerializationContext context) { |
| JsonObject json = new JsonObject(); |
| json.add("arguments", context.serialize(src.getArguments())); |
| json.add("runnableArguments", context.serialize(src.getRunnableArguments().asMap())); |
| |
| return json; |
| } |
| |
| @Override |
| public Arguments deserialize(JsonElement json, Type typeOfT, |
| JsonDeserializationContext context) throws JsonParseException { |
| JsonObject jsonObj = json.getAsJsonObject(); |
| List<String> arguments = context.deserialize(jsonObj.get("arguments"), new TypeToken<List<String>>() { }.getType()); |
| Map<String, Collection<String>> args = context.deserialize(jsonObj.get("runnableArguments"), |
| new TypeToken<Map<String, Collection<String>>>() { |
| }.getType()); |
| |
| ImmutableMultimap.Builder<String, String> builder = ImmutableMultimap.builder(); |
| for (Map.Entry<String, Collection<String>> entry : args.entrySet()) { |
| builder.putAll(entry.getKey(), entry.getValue()); |
| } |
| return new Arguments(arguments, builder.build()); |
| } |
| } |