public class MyJsonParser implements JsonParser{ @Override public Map toWiseSayList(String str) { Map sayMap = new HashMap<>(); tokenization(str.substring(1, str.length() - 1)).stream().map(this::strToWiseSay) .forEach(i->{ sayMap.put(i.getId(),i); }); return sayMap; } @Override public String toJsonArray(Map map) { StringBuilder sb= new StringBuilder("["); for(Map.Entry entry : map.entrySet()){ WiseSay say = entry.getValue(); sb.append("{\"id\":"+say.getId()+",\"content\":\""+say.getContent()+"\",\"author\":\""+say.getAuthor()+"\"},"); } sb.deleteCharAt(sb.length()-1); sb.append("]"); return sb.toString(); } private List tokenization(String str){ List tokens = new ArrayList<>(); int idx = 0; while(idx < str.length()){ int tmp = idx+1; while(tmp-1 >=0 && tmp < str.length() && (str.charAt(tmp-1)!='}' || str.charAt(tmp)!=',')){ tmp++; } tokens.add(str.substring(idx+1,tmp)); idx = tmp+1; } return tokens; } private WiseSay strToWiseSay(String str){ Map map = new HashMap<>(); int idx = 0; while(idx < str.length()){ int tmp = idx; while(tmp +1 < str.length() && (str.charAt(tmp)!=',' || str.charAt(tmp+1)!='"')) tmp++; String[] token = str.substring(idx,tmp).split(":",2); map.put(processQuote(token[0]),processQuote(token[1])); idx = tmp+1; } if(!(map.containsKey("id") && map.containsKey("content") && map.containsKey("author"))) throw new RuntimeException("파싱 중 에러"); return new WiseSay(Integer.parseInt(map.get("id")), map.get("content"),map.get("author")); } // "id" -> id, "content" -> content private String processQuote(String str){ if(str.startsWith("\"")) return str.substring(1,str.length()-1); return str; } }

왕종휘_0714