code: package caevo.sieves;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import caevo.SieveDocument;
  import caevo.SieveDocuments;
  import caevo.SieveSentence;
  import caevo.TextEvent;
  import caevo.Timex;
  import caevo.tlink.EventEventLink;
  import caevo.tlink.TLink;
  import caevo.tlink.TimeTimeLink;
  
  /**
   * JUST AN EXAMPLE Stupid sieve that shows how to access basic data structures.
   * It generates BEFORE links between all intra-sentence pairs.
   * 
   * @author chambers
   */
  public class StupidSieve implements Sieve {
  
    /**
     * The main function. All sieves must have this.
     */
    public List<TLink> annotate(SieveDocument doc, List<TLink> currentTLinks) {
      // The size of the list is the number of sentences in the document.
      // The inner list is the events in textual order.
      List<List<TextEvent>> allEvents = doc.getEventsBySentence();
      List<List<Timex>> allTimexes = doc.getTimexesBySentence();
  
      // Fill this with our new proposed TLinks.
      List<TLink> proposed = new ArrayList<TLink>();
  
      // Make BEFORE links between all intra-sentence pairs.
      int sid = 0;
      for (SieveSentence sent : doc.getSentences()) {
        // System.out.println("DEBUG: adding tlinks from " + docname + " sentence
        // " + sent.sentence());
        proposed.addAll(allPairsEvents(allEvents.get(sid)));
        proposed.addAll(allPairsTimes(allTimexes.get(sid)));
        sid++;
      }
  
      // System.out.println("TLINKS: " + proposed);
      return proposed;
    }
  
    /**
     * All pairs of events are BEFORE relations based on text order!
     */
    private List<TLink> allPairsEvents(List<TextEvent> events) {
      List<TLink> proposed = new ArrayList<TLink>();
  
      for (int xx = 0; xx < events.size(); xx++) {
        for (int yy = xx + 1; yy < events.size(); yy++) {
          proposed.add(new EventEventLink(events.get(xx).getEiid(),
              events.get(yy).getEiid(), TLink.Type.BEFORE));
        }
      }
  
      // System.out.println("events: " + events);
      // System.out.println("created tlinks: " + proposed);
      return proposed;
    }
  
    /**
     * All pairs of times are BEFORE relations based on text order!
     */
    private List<TLink> allPairsTimes(List<Timex> timexes) {
      List<TLink> proposed = new ArrayList<TLink>();
  
      for (int xx = 0; xx < timexes.size(); xx++) {
        for (int yy = xx + 1; yy < timexes.size(); yy++) {
          proposed.add(new TimeTimeLink(timexes.get(xx).getTid(),
              timexes.get(yy).getTid(), TLink.Type.BEFORE));
        }
      }
  
      return proposed;
    }
  
    /**
     * No training. Just rule-based.
     */
    public void train(SieveDocuments trainingInfo) {
      // no training
    }
  
  }
  