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This library is the result of freezy's Kodi JSON introspection, merged with dereulenspiegel's adoption without android, and patched to Kodi 16 Jarvis.
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/*
 *      Copyright (C) 2005-2015 Team XBMC
 *      http://xbmc.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with XBMC Remote; see the file license.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

package org.tinymediamanager.jsonrpc.api;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.ArrayNode;
import org.codehaus.jackson.node.ObjectNode;

public abstract class AbstractModel implements JsonSerializable {

  /**
   * Reference to Jackson's object mapper
   */
  protected final static ObjectMapper OM = new ObjectMapper();

  protected String                    mType;

  @Override
  public String toString() {
    return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
  }

  /**
   * Tries to read an integer from JSON object.
   *
   * @param node
   *          JSON object
   * @param key
   *          Key
   * @return Integer value if found, -1 otherwise.
   */
  public static int parseInt(JsonNode node, String key) {
    return node.has(key) ? node.get(key).getIntValue() : -1;
  }

  /**
   * Tries to read an integer from JSON object.
   *
   * @param node
   *          JSON object
   * @param key
   *          Key
   * @return String value if found, null otherwise.
   */
  public static String parseString(JsonNode node, String key) {
    return node.has(key) ? node.get(key).getTextValue() : null;
  }

  /**
   * Tries to read an boolean from JSON object.
   *
   * @param node
   *          JSON object
   * @param key
   *          Key
   * @return String value if found, null otherwise.
   */
  public static Boolean parseBoolean(JsonNode node, String key) {
    final boolean hasKey = node.has(key);
    if (hasKey) {
      return node.get(key).getBooleanValue();
    }
    else {
      return null;
    }
  }

  public static Double parseDouble(JsonNode node, String key) {
    return node.has(key) ? node.get(key).getDoubleValue() : null;
  }

  public static ArrayList getStringArray(JsonNode node, String key) {
    if (node.has(key)) {
      final ArrayNode a = (ArrayNode) node.get(key);
      final ArrayList l = new ArrayList(a.size());
      for (int i = 0; i < a.size(); i++) {
        l.add(a.get(i).getTextValue());
      }
      return l;
    }
    return new ArrayList(0);
  }

  public static ArrayList getIntegerArray(JsonNode node, String key) {
    if (node.has(key)) {
      final ArrayNode a = (ArrayNode) node.get(key);
      final ArrayList l = new ArrayList(a.size());
      for (int i = 0; i < a.size(); i++) {
        l.add(a.get(i).getIntValue());
      }
      return l;
    }
    return new ArrayList(0);
  }

  public static HashMap getStringMap(JsonNode node, String key) {
    if (node.has(key)) {
      final ObjectNode n = (ObjectNode) node.get(key);
      final HashMap m = new HashMap();
      final Iterator it = n.getFieldNames();
      while (it.hasNext()) {
        final String fieldName = it.next();
        m.put(fieldName, n.get(fieldName).getValueAsText());
      }
      return m;
    }
    return new HashMap();
  }

}