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/*
 * Copyright (c) 2019 - Manifold Systems LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package manifold.science.util;

import java.math.BigDecimal;
import java.math.BigInteger;

/**
 * This class provides constants to conveniently express complex numeric values with high precision.
 * 
 * Import constants of this class like this:
 * 

 *   import static manifold.science.util.CoercionConstants.*;
 * 
 * Then use them to conveniently express {@link Rational}, {@code BigDecimal}, and {@code BigInteger} values like this:
 * 
 *   Rational result = 3.0080111026763916015 r + 2.3456 r;
 * 
 * Note unlike floating point literals, these expressions retain the precision of the literal decimal values.
 */
public interface CoercionConstants
{
  RationalCoercion r = RationalCoercion.INSTANCE;
  BigDecimalCoercion bd = BigDecimalCoercion.INSTANCE;
  BigIntegerCoercion bi = BigIntegerCoercion.INSTANCE;

  class RationalCoercion
  {
    static final RationalCoercion INSTANCE = new RationalCoercion();

    public Rational postfixBind( String value )
    {
      return Rational.get( value );
    }

    public Rational postfixBind( Integer value )
    {
      return Rational.get( value );
    }

    public Rational postfixBind( Long value )
    {
      return Rational.get( value );
    }

    public Rational postfixBind( Float value )
    {
      return Rational.get( value );
    }

    public Rational postfixBind( Double value )
    {
      return Rational.get( value );
    }

    public Rational postfixBind( BigInteger value )
    {
      return Rational.get( value );
    }

    public Rational postfixBind( BigDecimal value )
    {
      return Rational.get( value );
    }
  }

  class BigDecimalCoercion
  {
    static final BigDecimalCoercion INSTANCE = new BigDecimalCoercion();

    public BigDecimal postfixBind( String value )
    {
      return new BigDecimal( value );
    }

    public BigDecimal postfixBind( Integer value )
    {
      return BigDecimal.valueOf( value );
    }

    public BigDecimal postfixBind( Long value )
    {
      return BigDecimal.valueOf( value );
    }

    public BigDecimal postfixBind( Float value )
    {
      return BigDecimal.valueOf( value );
    }

    public BigDecimal postfixBind( Double value )
    {
      return BigDecimal.valueOf( value );
    }

    public BigDecimal postfixBind( BigInteger value )
    {
      return new BigDecimal( value );
    }
  }

  class BigIntegerCoercion
  {
    static final BigIntegerCoercion INSTANCE = new BigIntegerCoercion();

    public BigInteger postfixBind( String value )
    {
      return new BigInteger( value );
    }

    public BigInteger postfixBind( Integer value )
    {
      return BigInteger.valueOf( value );
    }

    public BigInteger postfixBind( Long value )
    {
      return BigInteger.valueOf( value );
    }
  }
}