SpEL ternary expression is missing fallback part during parsing.

[Mitsuki0710]

Having a Spring ternary expression "Did he win the race? ${['win'] ? 'Yes.' : "No.'}", PlaceholderParser will break it into two parts.

1. TextPart - { text : "Did he win the race?" }
2. SimplePlaceholderPart - { key : "['win'] ? 'Yes.'", fallback : "'No.'", text : "['win'] ? "'Yes.' : 'No.'" }

But while resolving the SimplePlaceholderPart context, it returns the key value of it which misses the fallback part (PlaceholderParser.class : L376).

Now, if try SpelExpression.doParseExpression("['win'] ? 'Yes.'"), this.eatToken(TokenKind.COLON);(InternalSpelExpressionParser.class : L155) will throw the exception.

[sbrannen]

The ${...} syntax is for a property placeholder, and the result you are getting seems to be appropriate.

If you intend for that be evaluated as a SpEL expression, you need to use the #{['win'] ? 'Yes.' : "No.'} syntax.

Does switching to the #{...} syntax solve your problem?

If not, what is it you are trying to achieve?

[Mitsuki0710]

Unfortunately, #{...} doesn't work.

We are using SpEL expression to parse the expression and replace placeholders with property values.

['win'] this will be replaced by a true value from properties, and should return 'Yes.'.
So the final result we are expecting is "Did he win the race? Yes.

[sbrannen]

Does the following work for you?

"Did he win the race? #{${win} ? 'Yes.' : "No.'}"

[Mitsuki0710]

"Did he win the race? #{${win} ? 'Yes.' : "No.'}"
has the following error
ERROR [main] [SpelPropertyResolver] EL1008E: Property or field 'win' cannot be found on object of type 'java.util.Properties' - maybe not public or not valid?ERROR [main] [SpelPropertyResolver] EL1008E: Property or field 'win' cannot be found on object of type 'java.util.Properties' - maybe not public or not valid?

If I wrap up with [] make it replaceable with property value
"Did he win the race? #{${[win]} ? 'Yes.' : "No.'}"
gets the following result:
Expected :Did he win the race? Yes. Actual :Did he win the race? #{true ? 'Yes.' : 'No.'}

And I am constructing the property placeholder helper via PropertyPlaceholderHelper("${", "}", ":", null, true)

[sbrannen]

Please provide a minimal sample application that demonstrates what you are trying to achieve, one that we can download and run ourselves, such as a public Git repository or a ZIP file.

Without that, I'm afraid we cannot determine if what you are trying to accomplish is supported.