NumberFormatException for ISO dates as a variable value

[chkal]

If you have code like this:

new Expression( "23" )
  .with( "someString", "2022-01-02" )
  .eval();

The following exception is thrown:

java.lang.NumberFormatException
	at java.math.BigDecimal.<init>(BigDecimal.java:497)
	at java.math.BigDecimal.<init>(BigDecimal.java:827)
	at com.udojava.evalex.Expression.setVariable(Expression.java:1804)
	at com.udojava.evalex.Expression.with(Expression.java:1923)
	at com.udojava.evalex.TestVariables.testIsoDateInString(TestVariables.java:119)

The issue seems to be that Expression.isNumber() returns true and creating a BigDecimal from the string fails.

Please note that this issue occurs on the current 2.x branch.

[chkal]

I just created a PR for a unit test that reproduces this issue: #320

[uklimaschewski]

Thank you, but I think I will not fix this on the old 2.x branch. Anyone who needs to add strings to expressions should upgrade to version 3. It has full string support and will probably also have date and time support in the future.