/*
* 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.ImmutableSet;
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.JvmOptions;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.lang.reflect.Type;
import java.util.Set;
/**
* Gson codec for {@link JvmOptions}.
*/
public class JvmOptionsCodec implements JsonSerializer<JvmOptions>, JsonDeserializer<JvmOptions> {
private static final Gson GSON = new GsonBuilder().registerTypeAdapter(JvmOptions.class, new JvmOptionsCodec())
.registerTypeAdapter(JvmOptions.DebugOptions.class,
new DebugOptionsCodec())
.create();
public static void encode(JvmOptions jvmOptions, OutputSupplier<? extends Writer> writerSupplier) throws IOException {
Writer writer = writerSupplier.getOutput();
try {
GSON.toJson(jvmOptions, writer);
} finally {
writer.close();
}
}
public static JvmOptions decode(InputSupplier<? extends Reader> readerSupplier) throws IOException {
Reader reader = readerSupplier.getInput();
try {
return GSON.fromJson(reader, JvmOptions.class);
} finally {
reader.close();
}
}
@Override
public JvmOptions deserialize(JsonElement json, Type type, JsonDeserializationContext context)
throws JsonParseException {
JsonObject jsonObj = json.getAsJsonObject();
String extraOptions = context.deserialize(jsonObj.get("extraOptions"), String.class);
JvmOptions.DebugOptions debugOptions = context.deserialize(jsonObj.get("debugOptions"),
JvmOptions.DebugOptions.class);
return new JvmOptions(extraOptions, debugOptions);
}
@Override
public JsonElement serialize(JvmOptions jvmOptions, Type type, JsonSerializationContext context) {
JsonObject json = new JsonObject();
json.add("extraOptions", context.serialize(jvmOptions.getExtraOptions()));
json.add("debugOptions", context.serialize(jvmOptions.getDebugOptions()));
return json;
}
private static class DebugOptionsCodec
implements JsonSerializer<JvmOptions.DebugOptions>, JsonDeserializer<JvmOptions.DebugOptions> {
@Override
public JvmOptions.DebugOptions deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
throws JsonParseException {
JsonObject jsonObj = json.getAsJsonObject();
Boolean doDebug = context.deserialize(jsonObj.get("doDebug"), Boolean.class);
if (!doDebug) {
return JvmOptions.DebugOptions.NO_DEBUG;
}
Boolean doSuspend = context.deserialize(jsonObj.get("doSuspend"), Boolean.class);
Set<String> runnables = context.deserialize(jsonObj.get("runnables"),
new TypeToken<Set<String>>() { }.getType());
return new JvmOptions.DebugOptions(true, doSuspend, runnables == null ? null : ImmutableSet.copyOf(runnables));
}
@Override
public JsonElement serialize(JvmOptions.DebugOptions src, Type typeOfSrc, JsonSerializationContext context) {
JsonObject json = new JsonObject();
json.add("doDebug", context.serialize(src.doDebug()));
json.add("doSuspend", context.serialize(src.doSuspend()));
if (src.getRunnables() != null) {
json.add("runnables", context.serialize(src.getRunnables()));
}
return json;
}
}
}