/**
* @param jsonArray
* @return a String array represents the animation. eg. "animation1", "animation2"....
*/
private String[] makeFrames(JSONArray jsonArray) {
int size = jsonArray.length();
String[] result = new String[size];
for (int i = 0; i < jsonArray.length(); i++) {
result[i] = jsonArray.getJSONObject(i).getString("id");
}
return result;
}
/**
* The purpose of this method is to register the resource based on their category. Because
* different category has different fields. All the loops are supposed to be the same so by doing
* this way we avoid duplicated code. To make this fit in the open-closed principle, we use
* strategy pattern. Because every time we want to register new category or want to change the way
* how we register it, we can make new classes. This Register class remains closed. Actually, all
* the strategy class should be put into different folders. I didn't do that because Strategy
* Pattern for this is already an overkill for this because or the register strategy class is so
* simple. But this can be viewed as left for further extensibility. For example, one may come up
* with new data format to register pictures.
*
* @param parser: the parser passed from model.
* @param category: which part to initialize
*/
private void register(Parser parser, RegisterStrategy rs) {
JSONArray items = parser.getJSONObject("resources").getJSONArray(rs.category);
for (int i = 0; i < items.length(); i++) {
JSONObject oneItem = items.getJSONObject(i);
rs.register(oneItem);
}
}