1. import java.io.*;
  2. import java.util.*;
  4. public class DataIndexer {
  6. private static final String CONFIG_FILE = "config.txt";
  7. private static final String INDEX_FILE = "index.txt";
  9. private Map<String, List<String>> index = new HashMap<>();
  11. public DataIndexer() {
  12. loadConfiguration();
  13. buildIndex();
  14. }
  16. // Loads the configuration from config.txt
  17. private void loadConfiguration() {
  18. try (BufferedReader reader = new BufferedReader(new FileReader(CONFIG_FILE))) {
  19. String line;
  20. while ((line = reader.readLine()) != null) {
  21. String[] parts = line.split(",");
  22. if (parts.length == 2) {
  23. index.put(parts[0].trim(), Arrays.asList(parts[1].trim().split(" ")));
  24. }
  25. }
  26. } catch (IOException e) {
  27. System.err.println("Error loading configuration: " + e.getMessage());
  28. }
  29. }
  31. // Builds the index based on the configuration
  32. private void buildIndex() {
  33. // In a real application, this would read the user data.
  34. // For this example, we'll simulate data loading.
  35. List<String> data = simulateUserData();
  37. for (String item : data) {
  38. for (Map.Entry<String, List<String>> entry : index.entrySet()) {
  39. if (entry.getKey().contains(item)) { //add if contains
  40. entry.getValue().add(item);
  41. }
  42. }
  43. }
  45. // Write the index to index.txt
  46. try (BufferedWriter writer = new BufferedWriter(new FileWriter(INDEX_FILE))) {
  47. for (Map.Entry<String, List<String>> entry : index.entrySet()) {
  48. writer.write(entry.getKey() + ":" + entry.getValue().toString());
  49. writer.newLine();
  50. }
  51. } catch (IOException e) {
  52. System.err.println("Error writing index: " + e.getMessage());
  53. }
  54. }
  57. private List<String> simulateUserData() {
  58. return Arrays.asList("apple", "banana", "orange", "grapefruit", "apple pie");
  59. }
  62. // Searches the index for a given term
  63. public List<String> search(String term) {
  64. List<String> results = new ArrayList<>();
  65. for (Map.Entry<String, List<String>> entry : index.entrySet()) {
  66. if (entry.getKey().contains(term)) {
  67. results.addAll(entry.getValue());
  68. }
  69. }
  70. return results;
  71. }
  74. public static void main(String[] args) {
  75. DataIndexer indexer = new DataIndexer();
  77. //Example usage
  78. List<String> searchResults = indexer.search("apple");
  79. System.out.println("Search results for 'apple': " + searchResults);
  80. }
  81. }

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