/**
 * Representation of common properties of items in a library's circulation system
 * (Version 1, no abstract classes/methods)
 * CSE142 lecture example 3/03  HP
 * 
 * Note: to keep the example simple, there is no attempt to detect problems like
 * trying to check in an item that is not checked out, etc.
 */
public class CirculationItem {
  // instance variables
  private String  title;                  // item title
  private String  callNumber;             // Library of Congress call #
  private boolean checkedOut;             // = "this item is currently checked out"
  
  /** Construct new CirculationItem with specified title and call # */
  public CirculationItem(String title, String callNumber) {
    this.title = title;
    this.callNumber = callNumber;
    this.checkedOut = false;
  }
  
  /** Return the title of this CirculationItem */
  public String getTitle() {
    return title;
  }
  
  /** Return the call number of this CirculationItem */
  public String getCallNumber() {
    return callNumber;
  }
  
  /** Check in this CirculationItem */
  public void checkin() {
    checkedOut = false;
  }
  
  /** Check out this CirculationItem */
  public void checkout() {
    checkedOut = true;
  }
  
  /** = "this item is in the library" */
  public boolean inLibrary() {
    return !checkedOut;
  }
  
  public String toString() {
    return "CirculationItem(title=" + title + ", callNumber=" + callNumber +
      "checked out=" + checkedOut + ")";
  }
    
}