package org.lsst.ccs.localdb.statusdb.model;
   
   import java.util.logging.Logger;
   import javax.persistence.Column;
   import javax.persistence.Entity;
   import javax.persistence.GeneratedValue;
   import javax.persistence.GenerationType;
   import javax.persistence.Id;
   import javax.persistence.ManyToOne;
  import javax.persistence.Table;
  import javax.persistence.Transient;
  
  @Entity
  @Table(name = "statdata")
  public class StatData {
  
      static Logger log = Logger.getLogger("org.lsst.ccs.localdb");
      private long id;
      private StatDesc descr;
      private long tstampFirst;
      private long tstampLast;
      private double data;
      private double sum2;
      private int n;
  
      //TODO keep min and max?
      public StatData() {
      }
  
      public StatData(StatDesc d) {
          descr = d;
      }
  
      public StatData(StatDesc d, RawData x) {
          log.info("new StatData from " + d + " and " + x);
          log.info(x.getTstamp() + " " + x.getDoubleData());
          descr = d;
          data = x.getDoubleData();
          sum2 = data * data;
          n = 1;
          tstampFirst = x.getTstamp();
          tstampLast = x.getTstamp();
      }
  
      @Transient
      public double getSum() {
          return getData() * getN();
      }
  
      public void setSum(double s) {
          setData(s / getN());
      }
  
      @Transient
      public double getRMS() {
          return Math.sqrt(getSum2() / getN() - getData() * getData());
      }
  
      public void accumulate(RawData x) {
          double sum = getSum();
          sum += x.getDoubleData();
          setSum2(getSum2() + x.getDoubleData() * x.getDoubleData());
          setN(getN() + 1);
          setSum(sum);
          setTstampLast(x.getTstamp());
      }
  
      /**
       * @return the id
       */
      @Id
      @GeneratedValue(strategy = GenerationType.AUTO)
      public long getId() {
          return id;
      }
  
      /**
       * @param id the id to set
       */
      public void setId(long id) {
          this.id = id;
      }
  
      /**
       * @return the descr
       */
      @ManyToOne
      public StatDesc getDescr() {
          return descr;
      }
  
      /**
       * @param descr the descr to set
       */
      public void setDescr(StatDesc descr) {
          this.descr = descr;
      }
  
      /**
      * @return the tstampFirst
      */
     @Column(name = "tstampmills1")
     public long getTstampFirst() {
         return tstampFirst;
     }
 
     /**
      * @param tstampFirst the tstampFirst to set
      */
     public void setTstampFirst(long tstampFirst) {
         this.tstampFirst = tstampFirst;
     }
 
     /**
      * @return the tstampLast
      */
     @Column(name = "tstampmills2")
     public long getTstampLast() {
         return tstampLast;
     }
 
     /**
      * @param tstampLast the tstampLast to set
      */
     public void setTstampLast(long tstampLast) {
         this.tstampLast = tstampLast;
     }
 
     /**
      * @return the data
      */
     public double getData() {
         return data;
     }
 
     /**
      * @param data the data to set
      */
     public void setData(double data) {
         this.data = data;
     }
 
     /**
      * @return the sum2
      */
     public double getSum2() {
         return sum2;
     }
 
     /**
      * @param sum2 the sum2 to set
      */
     public void setSum2(double sum2) {
         this.sum2 = sum2;
     }
 
     /**
      * @return the n
      */
     public int getN() {
         return n;
     }
 
     /**
      * @param n the n to set
      */
     public void setN(int n) {
         this.n = n;
     }
 }