StringExtractor.java

/*
 * Copyright (C) 2012 Facebook, Inc.
 *
 * 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.facebook.config;

import org.json.JSONException;
import org.json.JSONObject;

public class StringExtractor implements Extractor<String> {
  @Override
  public String extract(String key, JSONObject jsonObject) throws JSONException {
    Object obj = jsonObject.get(key);

    if (obj instanceof String) {
      return (String) obj;
    } else {
      return String.valueOf(obj);
    }
  }
}