package myorg.relex.collection;
   
   import java.util.Collections;
   import java.util.LinkedList;
   import java.util.List;
   
   import javax.persistence.*;
   
   /**
   * This entity class provides an example of an ordered list of child entities ordered by a business property
   * in the child entity.
   */
  @Entity
  @Table(name="RELATIONEX_PATH")
  public class Path {
  	@Id @GeneratedValue
  	private int id;
  	
  	@OneToMany(cascade=CascadeType.ALL, fetch=FetchType.EAGER)
  	@JoinColumn
  	@OrderBy("number ASC")
  	private List<Segment> segments;
  	
  	@Column(length=16)
  	private String name;
  
  	public int getId() { return id; }
  
  	public List<Segment> getSegments() {
  		if (segments==null) { segments = new LinkedList<Segment>(); }
  		return segments; 
  	}
  	//private class SegmentComparator implements Comparator<Segment>
  	
  	public Path addSegment(Segment segment) {
  		getSegments().add(segment);
  		/*
  		Collections.sort(segments, new Comparator<Segment>() {
  			@Override
  			public int compare(Segment lhs, Segment rhs) {
  				if (lhs == rhs || lhs==null && rhs == null) { return 0; }
  				if (lhs != null && rhs == null) { return 1; }
  				if (lhs == null && rhs != null) { return -1; }
  				int result = lhs.getNumber() - rhs.getNumber();
  				log.debug(lhs.getClass().getSimpleName() + lhs.toString() + 
  						".compareTo" + rhs.toString() + 
  						"=" + result
  						);
  				return result;
  			}});
  			*/
  		Collections.sort(segments);
  		return this;
  	}
  
  	public String getName() { return name; }
  	public void setName(String name) {
  		this.name = name;
  	}
  }