/*
    * 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;
  import net.sf.zel.math.ExtendedMathContext;
  
  @Immutable
  public final class OperableBigDecimal extends OperableNumber
  {
      private static final long serialVersionUID = -1790422919528652103L;
  
      public static final OperableBigDecimal ZERO = new OperableBigDecimal(BigDecimal.ZERO);
      public static final OperableBigDecimal ONE = new OperableBigDecimal(BigDecimal.ONE);
  
      private final BigDecimal number;
  
      public OperableBigDecimal(final BigDecimal n)
      {
          number = n;
      }
  
      public OperableBigDecimal(final String str)
      {
          number = new BigDecimal(str, ExtendedMathContext.CURRENT_EXTENDED_MATH_CONTEXT.get().getMathContext());
      }
  
      @Override
      public OperableNumber zero()
      {
          return ZERO;
      }
  
      @Override
      public OperableNumber add(OperableNumber addend)
      {
          return new OperableBigDecimal(number.add(addend.bigDecimalValue(),
                  ExtendedMathContext.CURRENT_EXTENDED_MATH_CONTEXT.get().getMathContext() ));
      }
  
      @Override
      public OperableNumber subtract(OperableNumber subtrahend)
      {
          return new OperableBigDecimal(number.subtract(subtrahend.bigDecimalValue(),
                  ExtendedMathContext.CURRENT_EXTENDED_MATH_CONTEXT.get().getMathContext() ));
      }
  
  
      @Override
      public OperableNumber multiply(OperableNumber multiplier)
      {
          return new OperableBigDecimal(number.multiply(multiplier.bigDecimalValue(),
                  ExtendedMathContext.CURRENT_EXTENDED_MATH_CONTEXT.get().getMathContext()) );
      }
  
      @Override
      public OperableNumber divide(OperableNumber divisor)
      {
          return new OperableBigDecimal(number.divide(divisor.bigDecimalValue(),
                  ExtendedMathContext.CURRENT_EXTENDED_MATH_CONTEXT.get().getMathContext()) );
      }
  
  
      @Override
      public OperableNumber mod(OperableNumber divisor)
      {
           throw new UnsupportedOperationException("mod on bigdecimals does not make sense");
      }
  
      @Override
      public BigDecimal bigDecimalValue()
      {
          return number;
      }
  
      @Override
      public BigInteger bigIntegerValue()
      {
          return number.toBigInteger();
      }
  
     public int compareTo(OperableNumber o)
     {
         return number.compareTo(o.bigDecimalValue());
     }
 
     @Override
     public Type getType()
     {
         return Type.REAL;
     }
 
     @Override
     public OperableGNUBigInteger gnuBigIntegerValue() {
         return new OperableGNUBigInteger(number.toString());
     }
 
     @Override
     public int intValue()
     {
         return number.intValue();
     }
 
     @Override
     public long longValue()
     {
         return number.longValue();
     }
 
     @Override
     public float floatValue()
     {
         return number.floatValue();
     }
 
     @Override
     public double doubleValue()
     {
         return number.doubleValue();
     }
 
     @Override
     public int compareTo(Object o)
     {
         return number.compareTo(((OperableNumber)o).bigDecimalValue());
     }
 
     @Override
     public String toString()
     {
         return number.toPlainString();
     }
 
     @Override
     public boolean equals(Object obj)
     {
         if (obj == null)
         {
             return false;
         }
         if (getClass() != obj.getClass())
         {
             return false;
         }
         final OperableBigDecimal other = (OperableBigDecimal) obj;
         if (this.number != other.number && (this.number == null || !this.number.equals(other.number)))
         {
             return false;
         }
         return true;
     }
 
     @Override
     public int hashCode()
     {
         return number.hashCode();
     }
 
     @Override
     public OperableGNUBigFloat gnuBigFloatValue()
     {
         return new OperableGNUBigFloat(number.toString());
     }
 
     @Override
     public int getPrecision()
     {
         return number.precision();
     }
 
     @Override
     public OperableNumber create(final String val)
     {
         if ("0.0".equals(val))
             return ZERO;
         else
             return new OperableBigDecimal(val);
     }
 
     @Override
     public ExtendedNumber one()
     {
         return ONE;
     }
 
     @Override
     public OperableNumber convert(ExtendedNumber val)
     {
         return new OperableBigDecimal(val.bigDecimalValue());
     }
 
 }