Sam Brannen
ea3e61fd2f
Prior to this commit, SpEL expression compilation could be silently activated in a SimpleEvaluationContext via the `spring.expression.compiler.mode` Spring/system property or SpelParserConfiguration. Once an expression is compiled, the evaluation guards enforced during interpreted evaluation are no longer applied, which is at odds with the restricted intent of SimpleEvaluationContext. To address that, this commit introduces a mechanism analogous to isAssignmentEnabled() which disables compilation by default in SimpleEvaluationContext. Specifically: - A new isCompilationSupported() default method has been introduced in the EvaluationContext API, which returns true by default. - SimpleEvaluationContext overrides isCompilationSupported() to return false by default. However, compilation can be opted into explicitly via the new withCompilationSupported() method in the SimpleEvaluationContext.Builder. - SpelExpression.checkCompile() now consults isCompilationSupported() before triggering new compilation, ensuring that evaluation within an EvaluationContext never produces a compiled form of the expression if the context's isCompilationSupported() method returns false. - All eight getValue() variants in SpelExpression now consult isCompilationSupported() before executing a compiled expression, ensuring that a compiled expression produced via a different EvaluationContext is not silently reused if the caller inadvertently switches to an EvaluationContext that does not support compilation. Closes gh-37035
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