/*
    * Copyright (c) 2001, Zoltan Farkas All Rights Reserved.
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 2.1 of the License, or (at your option) any later version.
    *
    * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
   */
  package net.sf.zel.nr;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import javax.annotation.concurrent.Immutable;
  import net.sf.zel.nr.ExtendedNumber.Type;
  
  @Immutable
  public final class OperableDouble extends OperableNumber
  {
      private static final long serialVersionUID = 3613491343405207027L;
      public static final OperableDouble ZERO = new OperableDouble(0.0);
      public static final OperableDouble ONE = new OperableDouble(1.0);
  
      private final double number;
  
      public OperableDouble(final double n)
      {
          number = n;
      }
  
      public OperableDouble(final String val)
      {
          number = Double.parseDouble(val);
      }
  
  
      @Override
      public OperableNumber zero()
      {
          return ZERO;
      }
  
      @Override
      public OperableNumber add(final OperableNumber addend)
      {
          return new OperableDouble(number + addend.doubleValue());
      }
  
      @Override
      public OperableNumber subtract(final OperableNumber subtrahend)
      {
          return new OperableDouble(number - subtrahend.doubleValue());
      }
  
      @Override
      public OperableNumber multiply(final OperableNumber multiplier)
      {
          return new OperableDouble(number * multiplier.doubleValue());
      }
  
      @Override
      public OperableNumber divide(final OperableNumber divisor)
      {
          return new OperableDouble(number / divisor.doubleValue());
      }
  
      @Override
      public OperableNumber mod(final OperableNumber divisor)
      {
          throw new UnsupportedOperationException("mod on double does not make sense");
      }
  
      @Override
      public BigDecimal bigDecimalValue()
      {
          return BigDecimal.valueOf(number);
      }
  
      @Override
      public BigInteger bigIntegerValue()
      {
          return BigInteger.valueOf((long)number);
      }
  
      @Override
      public int compareTo(Object o)
      {
          double other = ((OperableNumber) o).doubleValue();
          if (number > other)
          {
              return 1;
         } else if (number == other)
         {
             return 0;
         } else
         {
             return -1;
         }
     }
 
     @Override
     public Type getType()
     {
         return Type.REAL;
     }
 
     @Override
     public OperableGNUBigInteger gnuBigIntegerValue() {
         return new OperableGNUBigInteger(Double.toString(number));
     }
 
      @Override
     public int intValue()
     {
         return (int) number;
     }
 
     @Override
     public long longValue()
     {
         return (long) number;
     }
 
     @Override
     public float floatValue()
     {
         return (float) number;
     }
 
     @Override
     public double doubleValue()
     {
         return (double) number;
     }
 
 
 
     @Override
     public String toString()
     {
         return Double.toString(number);
     }
 
     @Override
     public boolean equals(Object obj)
     {
         if (obj == null)
         {
             return false;
         }
         if (getClass() != obj.getClass())
         {
             return false;
         }
         final OperableDouble other = (OperableDouble) obj;
         if (this.number != other.number)
         {
             return false;
         }
         return true;
     }
 
     @Override
     public int hashCode()
     {
         int hash = 7;
         hash = 37 * hash + (int) (Double.doubleToLongBits(this.number) ^ (Double.doubleToLongBits(this.number) >>> 32));
         return hash;
     }
 
     @Override
     public OperableGNUBigFloat gnuBigFloatValue()
     {
         throw new UnsupportedOperationException("Not supported yet.");
     }
 
     @Override
     public int getPrecision()
     {
         return 64;
     }
 
     @Override
     public OperableNumber create(String val)
     {
         if ("0.0".equals(val))
             return ZERO;
         else
             return new OperableDouble(val);
     }
 
     @Override
     public ExtendedNumber one()
     {
         return ONE;
     }
 
     @Override
     public OperableNumber convert(ExtendedNumber val)
     {
        return new OperableDouble(val.doubleValue());
     }
 
 }