package myorg.relex.collection;
   
   import java.util.Date;
   import java.util.concurrent.atomic.AtomicInteger;
   
   import javax.persistence.Column;
   import javax.persistence.GeneratedValue;
   import javax.persistence.Id;
   import javax.persistence.MappedSuperclass;
  import javax.persistence.Temporal;
  import javax.persistence.TemporalType;
  import javax.persistence.Transient;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * This class is used as a common base implementation by several implementations
   * of hashCode/equals.
   */
  @MappedSuperclass
  public abstract class Ship {
  	@Transient
  	protected final Logger log = LoggerFactory.getLogger(getClass());
  	private static AtomicInteger instanceId = new AtomicInteger();
  	@Transient
  	private int oid = instanceId.getAndAdd(1);
  	
  	@Id
  	@GeneratedValue
  	protected int id;
  	
  	@Column(length = 16)
  	protected String name; //businessId
  	
  	@Temporal(TemporalType.TIMESTAMP)
  	protected Date created;
  
  	
  	public int getId() { return id; }
  	public Ship setId(int id) {
  		this.id = id;
  		return this;
  	}
  
  	public String getName() { return name; }
  	public Ship setName(String name) {
  		this.name = name;
  		return this;
  	}
  
  	public Date getCreated() { return created; }
  	public Ship setCreated(Date created) {
  		this.created = created;
  		return this;
  	}
  	
  	public abstract int peekHashCode();
  	protected int objectHashCode() {
  		return super.hashCode();
  	}
  	
  	@Override
  	public int hashCode() {
  		return logHashCode(peekHashCode());
  	}
  	
  	public int logHashCode(int hashCode) {
  		log.info(toString() +
  				".hashCode=" + hashCode);
  		return hashCode;
  	}
  	
  	public boolean logEquals(Object obj, boolean equals) {
  		log.info(new StringBuilder()
  		    .append(toString())
  		    .append(".equals(id=")
  		    .append(obj==null?null : ((Ship)obj).id + ",oid=" + ((Ship)obj).oid)
  		    .append(")=")
  		    .append(equals)
                      .toString());
  		return equals;
  	}
  	
  	public String toString() {
  		return getClass().getSimpleName() + "(id=" + id + ",oid=" + oid + ")";
  	}
  }