1. import java.util.HashMap;
  2. import java.util.Map;
  4. public class DOMEncoder {
  6. public static String encodeDOM(Map<String, Object> dom) {
  7. StringBuilder encoded = new StringBuilder();
  9. for (Map.Entry<String, Object> entry : dom.entrySet()) {
  10. String key = entry.getKey();
  11. Object value = entry.getValue();
  13. if (value instanceof String) {
  14. // String: Escape special characters
  15. String str = (String) value;
  16. String encodedStr = str.replace("\\", "\\\\").replace("\"", "\\\""); //Basic escaping
  17. encoded.append("\"").append(encodedStr).append("\"\n"); // Wrap in quotes
  18. } else if (value instanceof Number) {
  19. // Number: Convert to string
  20. encoded.append(value.toString()).append("\n");
  21. } else if (value == null) {
  22. encoded.append("null\n");
  23. } else if (value instanceof Boolean) {
  24. encoded.append(value.toString()).append("\n");
  25. } else if (value instanceof Map) {
  26. // Recursive call for nested maps
  27. encoded.append("{");
  28. boolean first = true;
  29. for (Map.Entry<String, Object> nestedEntry : ((Map<String, Object>) value).entrySet()) {
  30. if (!first) {
  31. encoded.append(",");
  32. }
  33. encoded.append("\"").append(nestedEntry.getKey()).append("\":").append(encodeDOM(Map.of(nestedEntry.getKey(), nestedEntry.getValue()))).append("\n");
  34. first = false;
  35. }
  36. encoded.append("}\n");
  37. } else if (value instanceof List) {
  38. //List: Encode each element in the list
  39. encoded.append("[");
  40. boolean first = true;
  41. for (Object element : (List<Object>) value) {
  42. if (!first) {
  43. encoded.append(",");
  44. }
  45. encoded.append(encodeDOM(Map.of("value",element))); //Encode each element
  46. first = false;
  47. }
  48. encoded.append("]\n");
  49. }
  50. }
  52. return encoded.toString();
  53. }
  55. public static void main(String[] args) {
  56. // Example DOM structure
  57. Map<String, Object> dom = new HashMap<>();
  58. dom.put("name", "John Doe");
  59. dom.put("age", 30);
  60. dom.put("city", "New York");
  61. dom.put("address", new HashMap<>());
  62. dom.get("address").put("street", "123 Main St");
  63. dom.get("address").put("zip", "10001");
  64. dom.put("hobbies", new java.util.ArrayList<>());
  65. dom.get("hobbies").add("reading");
  66. dom.get("hobbies").add("coding");
  68. String encodedString = encodeDOM(dom);
  69. System.out.println(encodedString);
  70. }
  71. }

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