twill-core/src/main/java/org/apache/twill/internal/json/StackTraceElementCodec.java

/*
 * 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.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 java.lang.reflect.Type;

/**
 *
 */
public final class StackTraceElementCodec implements JsonSerializer<StackTraceElement>,
                                                     JsonDeserializer<StackTraceElement> {

  @Override
  public StackTraceElement deserialize(JsonElement json, Type typeOfT,
                                       JsonDeserializationContext context) throws JsonParseException {
    JsonObject jsonObj = json.getAsJsonObject();
    return new StackTraceElement(JsonUtils.getAsString(jsonObj, "className"),
                                 JsonUtils.getAsString(jsonObj, "method"),
                                 JsonUtils.getAsString(jsonObj, "file"),
                                 JsonUtils.getAsInt(jsonObj, "line", -1));
  }

  @Override
  public JsonElement serialize(StackTraceElement src, Type typeOfSrc, JsonSerializationContext context) {
    JsonObject jsonObj = new JsonObject();
    jsonObj.addProperty("className", src.getClassName());
    jsonObj.addProperty("method", src.getMethodName());
    jsonObj.addProperty("file", src.getFileName());
    jsonObj.addProperty("line", src.getLineNumber());

    return jsonObj;
  }
}