1. import java.util.HashMap;
  2. import java.util.Map;
  4. public class MetadataTruncator {
  6. /**
  7. * Truncates metadata fields for sandbox usage.
  8. *
  9. * @param metadata The original metadata as a Map.
  10. * @param truncationMap A map specifying fields to truncate and the desired length.
  11. * Key: field name (String), Value: maximum length (int).
  12. * @return A new Map with truncated metadata.
  13. */
  14. public static Map<String, Object> truncateMetadata(Map<String, Object> metadata, Map<String, Integer> truncationMap) {
  15. Map<String, Object> truncatedMetadata = new HashMap<>(metadata); // Create a copy to avoid modifying the original
  17. if (truncationMap != null) {
  18. for (Map.Entry<String, Integer> entry : truncationMap.entrySet()) {
  19. String fieldName = entry.getKey();
  20. Integer maxLength = entry.getValue();
  22. if (truncatedMetadata.containsKey(fieldName)) {
  23. Object value = truncatedMetadata.get(fieldName);
  25. if (value instanceof String) {
  26. truncatedMetadata.put(fieldName, ((String) value).substring(0, maxLength));
  27. } else if (value instanceof Number) {
  28. //Handle numbers. Truncate to a reasonable representation.
  29. truncatedMetadata.put(fieldName, ((Number) value).intValue()); //convert to int
  30. } else if (value instanceof Long) {
  31. truncatedMetadata.put(fieldName, ((Long) value).longValue());
  32. }
  33. else if (value instanceof Boolean)
  34. {
  35. truncatedMetadata.put(fieldName, value);
  36. }
  37. else {
  38. truncatedMetadata.put(fieldName, value); //Keep other types as they are
  39. }
  40. }
  41. }
  42. }
  43. return truncatedMetadata;
  44. }
  46. public static void main(String[] args) {
  47. //Example Usage
  48. Map<String, Object> metadata = new HashMap<>();
  49. metadata.put("name", "This is a very long name");
  50. metadata.put("description", "A detailed description of the item.");
  51. metadata.put("age", 30);
  52. metadata.put("score", 1234567890);
  53. metadata.put("isActive", true);
  56. Map<String, Integer> truncationMap = new HashMap<>();
  57. truncationMap.put("name", 10);
  58. truncationMap.put("description", 20);
  59. truncationMap.put("score", 8);
  61. Map<String, Object> truncated = truncateMetadata(metadata, truncationMap);
  63. System.out.println(truncated);
  64. }
  65. }

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