private String getJSONunitActivity(AggregateDB agg_db, String unit) {
// e.g.: activityIds: { ex: ["1"], qz: ["2"] }
String output = " activityIds: { ";
HashMap<String, ArrayList<String>> resActList = agg_db.getResourceActivity(unit);
// each element of actList contains {key:resource_id, value:activityList of that resource}
for (String res : resActList.keySet()) {
output += res + ": [" + getActString(resActList.get(res)) + "], ";
}
if (resActList.isEmpty() == false)
output = output.substring(0, output.length() - 2); // ignoring the last comma
output += " }";
return output;
}
