JSONHelper.java

package org.azavea.helpers;

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

import java.util.ArrayList;
import java.util.List;

public class JSONHelper {
    public static List<String> jsonStringArrayToList(JSONArray array) {
        List<String> strings = new ArrayList<>(array.length());
        for (int i = 0; i < array.length(); i++) {
            strings.add(array.isNull(i) ? null : array.optString(i));
        }
        return strings;
    }

    public static String safeGetString(JSONObject data, String key) {
        return data.isNull(key) ? null : data.optString(key);
    }
}