VL-Programmieren/VL12/Aufgabe01/StringFeld.java

package VL12.Aufgabe01;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;

/**
 * A field to store some information.
 *
 * @author Sebastian Brosch
 */
class StringFeld {
  private String[] values;

  StringFeld(String filePath) {
    List<String> lines = getFileLines(filePath);
    this.values = new String[lines.size()];
    lines.toArray(this.values);
  }

  StringFeld(String filePath, String separator, int index) {
    List<String> lines = getFileLines(filePath);
    this.values = new String[lines.size()];

    for (int i = 0; i < lines.size(); i++) {
      this.values[i] = lines.get(i).split(separator)[index];
    }
  }

  /**
   * Method to get a value.
   *
   * @param index The index of the value.
   * @return The value of the given index.
   */
  public String get(int index) {
    index = index % this.values.length;
    return this.values[index];
  }

  /**
   * Method to get a value.
   *
   * @param index     The index of the value.
   * @param maxLength The max length of the value.
   * @return The value of the given index.
   */
  public String get(int index, int maxLength) {
    index = index % this.values.length;

    if (this.values[index].length() > maxLength) {
      return this.values[index].substring(0, maxLength);
    } else {
      return this.values[index];
    }
  }

  /**
   * Method to get all the lines of a file.
   *
   * @param filePath The path to the file to get the lines from.
   * @return A list with all lines of the file.
   */
  private List<String> getFileLines(String filePath) {
    try {
      return Files.readAllLines(Paths.get(filePath), StandardCharsets.ISO_8859_1);
    } catch (IOException e) {
      e.printStackTrace();
      return List.of();
    }
  }
}