@ConfigProperty for java.util.Duration with defaultValue flagged as error

[fbricon]

same issue as redhat-developer/vscode-quarkus#631:

the following code generates an error:

    @ConfigProperty(name = "app.duration", defaultValue = "PT15M")
    Duration duration;

❌ The error message looks like that :

'PT15M' does not match the expected type of 'Duration'.microprofile-config(DEFAULT_VALUE_IS_WRONG_TYPE)

[fbricon]

MicroProfileConfigASTValidator is Microprofile specific, but Quarkus projects use a specific DurationConverter.

MicroProfileConfigASTValidator would need to load converters in a dynamic way (using special classloader) then we could validate via reflection, but that's not a trivial solution.

Or we take the dirty road and simply copy DurationConverter over, use it directly in MicroProfileConfigASTValidator (since it's only used for Quarkus projects anyways) and fix this issue.

Duration conversion would still need to be implemented at the QuarkusConfigMappingProvider / QuarkusConfigPropertiesProvider / QuarkusConfigRootProvider level so duration properties can show up and be validated in application.properties