Spring Support BigInteger and BigDecimal literals in SpEL expressions

Rimal opened SPR-17225 and commented

Can we please add a suffix support for BigInteger as well in SpEL. 

Currently, we can add a long value as 12345456L (with the L suffix) but for a BigInteger, we need to mention it as new java.math.BigInteger('9248040402').

It would be really helpful if we could mention a BigInteger as 9248040402BI or something on these lines.

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No further details from SPR-17225

Comment From: ovmarkushyn

@spring-projects-issues Could you please consider PR#31301 as a possible solution for the request #21758.

Comment From: sbrannen

Team Decision:

We consider the proposal to be a bit of a niche feature which does not warrant the complexity it would introduce within the Spring Expression Language (see PR #31301).

In general, at this point in time we do not intend to introduce new language-level features in the Spring Expression Language.

In light of that, we are closing this issue.

In any case, thank you for the proposal!

Comment From: sbrannen

Please note that it's always possible to register your own custom functions for such purposes, as long as you are in control of the setup of the EvaluationContext.

For example, the following test demonstrates how to register a custom bigInt function and use it within expressions instead of new java.math.BigInteger('9248040402').

@Test
void bigIntegerFunction() throws Exception {
    SpelExpressionParser parser = new SpelExpressionParser();
    StandardEvaluationContext context = new StandardEvaluationContext();
    Method method = BigInteger.class.getMethod("valueOf", long.class);
    context.registerFunction("bigInt", method);

    Expression expression = parser.parseExpression("3 + #bigInt(5)");
    BigInteger result = expression.getValue(context, BigInteger.class);
    assertThat(result).isEqualTo(BigInteger.valueOf(8));
}

And you could register a similar function (for example, bigDecimal) for BigDecimal support.

Hope you find this useful!