import SimpleDate;
import java.util.Vector;

/**
 * Methods for affecting the elements of a vector.  Ideally, these would
 * be provided by extending Vector class, but we may not yet have the
 * appropriate skills for doing so
 * 
 * Warning!  Some methods in the class are initially erroneous.
 *
 * @author Samuel A. Rebelsky
 * @author Your Name Here
 * @version 1.0 of January 1999
 */
public class VectorMod {
  /**
   * Put all of the strings in the vector into all caps.
   */
  public void allCaps(Vector vec) {
    int i;    // Counter variable for loop
    String s; // A string found in the vector
    // Step thrugh the elements of the vector
    for(i = 0; i < vec.size(); ++i) {
      // if the ith element is a string
      if (vec.elementAt(i) instanceof String) {
        // then put the string into upper case
        s = (String) vec.elementAt(i);
        vec.setElementAt(s.toUpperCase(), i);
      } // if it's a string
    } // for each element of the vector
  } // allCaps(Vector)
  
  /**
   * Reset all of the dates in the vector to the beginning of
   * the month.
   */
  public void firstOfMonth(Vector vec) {
    int i;        // Counter variable for the loop
    SimpleDate d; // A date found in the vector
    // Step through the elements of the vector
    for (i=0; i < vec.size(); ++i) {
      d = (SimpleDate) vec.elementAt(i);
      vec.setElementAt(new SimpleDate(d.getYear(),d.getMonth(),1), i);
    } // for each element of the vector
  } // firstOfMonth(Vector)
} // class VectorMod