NumericConverterImpl.java

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/*
 * NumericConverterImpl.java
 *
 * Created on March 21, 2003
 */

package com.sun.jdo.spi.persistence.support.sqlstore.utility;

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

/**
 * This is a concrete implementation class for numeric conversion to BigDecimal
 * or BigInteger. For conversion to BigInteger, we truncate the fraction
 * part of the number.
 *
 * @author Shing Wai Chan
 */
public class NumericConverterImpl implements NumericConverter {
     /**
      *
      */
     public NumericConverterImpl() {
     }

     /**
      * To convert BigInteger to BigDecimal.
      * @param bInteger the BigInteger to be converted
      * @return converted BigDecimal
      */
     public BigDecimal toBigDecimal(BigInteger bInteger) {
          return (bInteger == null) ? null : new BigDecimal(bInteger);
     }

     /**
      * To convert Double to BigDecimal.
      * @param d the Double to be converted
      * @return converted BigDecimal
      */
     public BigDecimal toBigDecimal(Double d) {
          return (d == null) ? null : new BigDecimal(d.toString());
     }

     /**
      * To convert Float to BigDecimal.
      * @param f the Float to be converted
      * @return converted BigDecimal
      */
     public BigDecimal toBigDecimal(Float f) {
          return (f == null) ? null : new BigDecimal(f.toString());
     }

     /**
      * To convert Number other than BigInteger, Double and Float to BigDecimal.
      * @param n the Number to be converted
      * @return converted BigDecimal
      */
     public BigDecimal toBigDecimal(Number n) {
          return (n == null) ? null : new BigDecimal(n.toString());
     }

     /**
      * To convert BigDecimal to BigInteger.
      * @param bDecimal the BigDecimal to be converted
      * @return converted BigInteger
      */
     public BigInteger toBigInteger(BigDecimal bDecimal) {
          return (bDecimal == null) ? null : bDecimal.toBigInteger();
     }

     /**
      * To convert Double to BigInteger.
      * @param d the Double to be converted
      * @return converted BigInteger
      */
     public BigInteger toBigInteger(Double d) {
          return (d == null) ? null : (new BigDecimal(d.toString())).toBigInteger();
     }

     /**
      * To convert Float to BigInteger.
      * @param f the Float to be converted
      * @return converted BigInteger
      */
     public BigInteger toBigInteger(Float f) {
          return (f == null) ? null : (new BigDecimal(f.toString())).toBigInteger();
     }

     /**
      * To convert Number other than BigDecimal, Double and Float to BigInteger.
      * @param n the Number to be converted
      * @return converted BigInteger
      */
     public BigInteger toBigInteger(Number n) {
          return (n == null) ? null : BigInteger.valueOf(n.longValue());
     }
}