Nullを考慮したJSONObject操作用ユーティリティクラス

JSONObjectUtil.java

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

/**
 * JSONObjectを扱うUtilクラス<br>
 * 基本型もオブジェクト型として返却するため項目がnullの場合にはnullを返す
 *
 * @author KCMEUser
 */
public class JSONObjectUtil {

    public static Object get(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.get(name) : null;
    }

    public static Object get(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.get(i) : null;
    }

    public static Integer getInteger(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.getInt(name) : null;
    }

    public static Integer getInteger(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.getInt(i) : null;
    }

    public static Long getLong(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.getLong(name) : null;
    }

    public static Long getLong(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.getLong(i) : null;
    }

    public static Double getDouble(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.getDouble(name) : null;
    }

    public static Double getDouble(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.getDouble(i) : null;
    }

    public static Boolean getBoolean(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.getBoolean(name) : null;
    }

    public static Boolean getBoolean(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.getBoolean(i) : null;
    }

    public static String getString(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.getString(name) : null;
    }

    public static String getString(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.getString(i) : null;
    }

    public static JSONObject getJSONObject(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.getJSONObject(name) : null;
    }

    public static JSONObject getJSONObject(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.getJSONObject(i) : null;
    }

    public static JSONArray getJSONArray(JSONObject jsonObject, String name) throws JSONException {
        return (jsonObject.has(name) && !jsonObject.isNull(name)) ? jsonObject.getJSONArray(name) : null;
    }

    public static JSONArray getJSONArray(JSONArray jsonArray, int i) throws JSONException {
        return (i < jsonArray.length() && !jsonArray.isNull(i)) ? jsonArray.getJSONArray(i) : null;
    }

}