package opennlp.maxent;public class RealBasicEventStream implements EventStream {  ContextGenerator cg = new BasicContextGenerator();  DataStream ds;  Event next;    public RealBasicEventStream(DataStream ds) {    this.ds = ds;    if (this.ds.hasNext())      next = createEvent((String)this.ds.nextToken());      }  public Event nextEvent() {    while (next == null && this.ds.hasNext())      next = createEvent((String)this.ds.nextToken());        Event current = next;    if (this.ds.hasNext()) {      next = createEvent((String)this.ds.nextToken());    }    else {      next = null;    }    return current;  }  public boolean hasNext() {    while (next == null && ds.hasNext())      next = createEvent((String)ds.nextToken());    return next != null;  }    private Event createEvent(String obs) {    int lastSpace = obs.lastIndexOf(' ');    if (lastSpace == -1)       return null;    else {      String[] contexts = obs.substring(0,lastSpace).split("\\s+");      float[] values = RealValueFileEventStream.parseContexts(contexts);      return new Event(obs.substring(lastSpace+1),contexts,values);    }  }  public static void main(String[] args) throws java.io.IOException {    EventStream es = new RealBasicEventStream(new PlainTextByLineDataStream(new java.io.FileReader(args[0])));    while (es.hasNext()) {      System.out.println(es.nextEvent());    }  }}