java math library for BigDecimal which allows null values

Question

Is there a BigDecimal library with the basic operations of BigDecimal which allows null values?

Null should be treated as 0 for mathematical purpose.

I don't want to do all the null checks for possible null values.

You either never allow null values in database, application or view and initialize everything with new BigDecimal(0) or perform null checks on every usage for nullable values.

Something like:

public static BigDecimal add(final BigDecimal value, final BigDecimal augend) {     if (value == null)         return augend;     else if (augend == null)         return value;     else         return value.add(augend); }  public static BigDecimal multiply(final BigDecimal value, final BigDecimal multiplicand) {     if (value == null || multiplicand == null)         return null;      return value.multiply(multiplicand); } 

Answer 1

Save the coding, just don't allow null values in the database. Make the default value zero.

As for new BigDecimal(0): no, use BigDecimal.ZERO.

Answer 2

I had a similar problem (not related to a database though, just needed to sum up a couple of nullable BigDecimals). Did not find any library, so had to write the following function myself:

public static BigDecimal add(BigDecimal... addends) {     BigDecimal sum = BigDecimal.ZERO;     if (addends != null) {         for (BigDecimal addend : addends) {             if (addend == null) {                 addend = BigDecimal.ZERO;             }             sum = sum.add(addend);         }     }     return sum; } 

The same in Java 8:

public static BigDecimal add(BigDecimal... addends) {     if (addends == null) {         return BigDecimal.ZERO;     }     return Arrays.stream(addends)             .filter(Objects::nonNull)             .reduce(BigDecimal.ZERO, BigDecimal::add); }