com.cognifide.aet.communication.api.metadata.gson.MapSerializer Maven / Gradle / Ivy

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/**
 * AET
 *
 * Copyright (C) 2013 Cognifide Limited
 *
 * 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.cognifide.aet.communication.api.metadata.gson;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import java.lang.reflect.Type;
import java.util.Map;

public class MapSerializer implements JsonSerializer> {

  @Override
  public JsonElement serialize(Map src, Type typeOfSrc, JsonSerializationContext context) {
    if (src == null || src.isEmpty()) {
      return null;
    }

    JsonObject map = new JsonObject();
    for (Map.Entry entry : src.entrySet()) {
      final Object entryKey = entry.getKey();
      final String key = entryKey != null ? entryKey.toString() : "";
      map.add(key, context.serialize(entry.getValue()));
    }
    return map;
  }
}