package myorg.relex.collection;
   
   import javax.persistence.*;
   
   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
   /**
    * This class represents an example entity that has an order in its parent's list.
    */
  @Entity
  @Table(name="RELATIONEX_SEGMENT")
  public class Segment implements Comparable<Segment>{
  	private static final Logger log = LoggerFactory.getLogger(Segment.class);
  	@Id @GeneratedValue
  	private int id;
  	
  	private int number; //a one-up sequence used to order a route
  	
  	@Column(name="TO", length=16)
  	private String to;
  	@Column(name="FM", length=16)
  	private String from;
  	
  	
  	public int getId() { return id; }
  
  	public int getNumber() { return number; }
  	public Segment setNumber(int number) {
  		this.number = number;
  		return this;
  	}
  	
  	public String getTo() { return to; }
  	public Segment setTo(String to) {
  		this.to = to;
  		return this;
  	}
  	
  	public String getFrom() { return from; }
  	public Segment setFrom(String from) {
  		this.from = from;
  		return this;
  	}
  
  	@Override
  	public int compareTo(Segment rhs) {
  		if (this == rhs) { return 0; }
  		int result = number - rhs.number;
  		log.debug(getClass().getSimpleName() + toString() + 
  				".compareTo" + rhs.toString() + 
  				"=" + result
  				);
  		return result;
  	}
  	
  	@Override
  	public String toString() {
  		return "(id=" + id + ",number=" + number + ")";
  	}
  
  	/*
  	@Override
  	public int hashCode() {
  		return number + (from==null?0 : from.hashCode()) + (to==null?0 : to.hashCode());
  	}
  	@Override
  	public boolean equals(Object obj) {
  		try {
  			if (this == obj) { return true; }
  			Segment rhs=(Segment)obj;
  			return hashCode() == rhs.hashCode();
  		} catch(Exception ex) { return false; }
  	}
  	*/
  }