Cast Error in OpenAPIGenerator for DateSchema and DateTimeSchema

[trafficant]

When having Date schema and a DateTimeSchema strings in the OpenAPI the value results in an Cast exception

To Reproduce
Steps to reproduce the behaviour:

1. Run `cats --contract ... --useExamples=true
2. Using which OpenAPI file a definition like

...
startDateTime:
in: query
name: startDate
description: Starting date and time in ISO8601 format for query
required: true
schema:
type: string
format: date-time
examples:
- "2018-10-09T08:16:29.234Z"
startDate:
in: query
name: startDate
description: Starting date for query
required: true
schema:
type: string
format: date
examples:
- "2018-10-09"
...

5. And details about the error/issue you are facing
   Getting the followng errors:

For Date:
Java.lang.ClassCastException: class java.lang.String cannot be cast to class java.util.Date (java.lang.String and java.util.Date are in module java.base of loader 'bootstrap')
at com.endava.cats.openapi.OpenAPIModelGenerator.formatExampleIfNeeded(OpenAPIModelGenerator.java:294)
at com.endava.cats.openapi.OpenAPIModelGenerator.extractExampleFromSchema(OpenAPIModelGenerator.java:258)
at com.endava.cats.openapi.OpenAPIModelGenerator.resolvePropertyToExample(OpenAPIModelGenerator.java:203)
at com.endava.cats.openapi.OpenAPIModelGenerator.parseFromInnerSchema(OpenAPIModelGenerator.java:644)
at com.endava.cats.openapi.OpenAPIModelGenerator.processInnerSchema(OpenAPIModelGenerator.java:581)
at com.endava.cats.openapi.OpenAPIModelGenerator.processSchemaProperties(OpenAPIModelGenerator.java:573)
at com.endava.cats.openapi.OpenAPIModelGenerator.resolveModelToExample(OpenAPIModelGenerator.java:529)
at com.endava.cats.openapi.OpenAPIModelGenerator.generate(OpenAPIModelGenerator.java:157)
at com.endava.cats.factory.FuzzingDataFactory.generateSample(FuzzingDataFactory.java:533)
at com.endava.cats.factory.FuzzingDataFactory.getRequestPayloadsSamples(FuzzingDataFactory.java:499)
at com.endava.cats.factory.FuzzingDataFactory.getFuzzDataForNonBodyMethods(FuzzingDataFactory.java:348)
at com.endava.cats.factory.FuzzingDataFactory.getFuzzingDataForGet(FuzzingDataFactory.java:228)
at com.endava.cats.factory.FuzzingDataFactory.fromPathItem(FuzzingDataFactory.java:131)
at com.endava.cats.factory.FuzzingDataFactory_ClientProxy.fromPathItem(Unknown Source)
at com.endava.cats.command.CatsCommand.fuzzPath(CatsCommand.java:379)
at com.endava.cats.command.CatsCommand.startFuzzing(CatsCommand.java:298)
at com.endava.cats.command.CatsCommand.doLogic(CatsCommand.java:243)
at com.endava.cats.command.CatsCommand.run(CatsCommand.java:193)
at picocli.CommandLine.executeUserObject(CommandLine.java:2030)
at picocli.CommandLine.access$1500(CommandLine.java:148)
at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2465)
at picocli.CommandLine$RunLast.handle(CommandLine.java:2457)
at picocli.CommandLine$RunLast.handle(CommandLine.java:2419)
at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2277)
at picocli.CommandLine$RunLast.execute(CommandLine.java:2421)
at picocli.CommandLine.execute(CommandLine.java:2174)
at com.endava.cats.CatsMain.run(CatsMain.java:41)
at com.endava.cats.CatsMain_ClientProxy.run(Unknown Source)
at io.quarkus.runtime.ApplicationLifecycleManager.run(ApplicationLifecycleManager.java:140)
at io.quarkus.runtime.Quarkus.run(Quarkus.java:71)
at io.quarkus.runtime.Quarkus.run(Quarkus.java:44)
at io.quarkus.runner.GeneratedMain.main(Unknown Source)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at io.quarkus.runner.bootstrap.StartupActionImpl$1.run(StartupActionImpl.java:116)
at java.base/java.lang.Thread.run(Thread.java:1570)

For DateTime
java.lang.ClassCastException: class java.lang.String cannot be cast to class java.time.OffsetDateTime (java.lang.String and java.time.OffsetDateTime are in module java.base of loader 'bootstrap')
at com.endava.cats.openapi.OpenAPIModelGenerator.formatExampleIfNeeded(OpenAPIModelGenerator.java:298)
at com.endava.cats.openapi.OpenAPIModelGenerator.extractExampleFromSchema(OpenAPIModelGenerator.java:258)
at com.endava.cats.openapi.OpenAPIModelGenerator.resolvePropertyToExample(OpenAPIModelGenerator.java:203)
at com.endava.cats.openapi.OpenAPIModelGenerator.parseFromInnerSchema(OpenAPIModelGenerator.java:644)
at com.endava.cats.openapi.OpenAPIModelGenerator.processInnerSchema(OpenAPIModelGenerator.java:581)
at com.endava.cats.openapi.OpenAPIModelGenerator.processSchemaProperties(OpenAPIModelGenerator.java:573)
at com.endava.cats.openapi.OpenAPIModelGenerator.resolveModelToExample(OpenAPIModelGenerator.java:529)
at com.endava.cats.openapi.OpenAPIModelGenerator.generate(OpenAPIModelGenerator.java:157)
at com.endava.cats.factory.FuzzingDataFactory.generateSample(FuzzingDataFactory.java:533)
at com.endava.cats.factory.FuzzingDataFactory.getRequestPayloadsSamples(FuzzingDataFactory.java:499)
at com.endava.cats.factory.FuzzingDataFactory.getFuzzDataForNonBodyMethods(FuzzingDataFactory.java:348)
at com.endava.cats.factory.FuzzingDataFactory.getFuzzingDataForGet(FuzzingDataFactory.java:228)
at com.endava.cats.factory.FuzzingDataFactory.fromPathItem(FuzzingDataFactory.java:131)
at com.endava.cats.factory.FuzzingDataFactory_ClientProxy.fromPathItem(Unknown Source)
at com.endava.cats.command.CatsCommand.fuzzPath(CatsCommand.java:379)
at com.endava.cats.command.CatsCommand.startFuzzing(CatsCommand.java:298)
at com.endava.cats.command.CatsCommand.doLogic(CatsCommand.java:243)
at com.endava.cats.command.CatsCommand.run(CatsCommand.java:193)
at picocli.CommandLine.executeUserObject(CommandLine.java:2030)
at picocli.CommandLine.access$1500(CommandLine.java:148)
at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2465)
at picocli.CommandLine$RunLast.handle(CommandLine.java:2457)
at picocli.CommandLine$RunLast.handle(CommandLine.java:2419)
at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2277)
at picocli.CommandLine$RunLast.execute(CommandLine.java:2421)
at picocli.CommandLine.execute(CommandLine.java:2174)
at com.endava.cats.CatsMain.run(CatsMain.java:41)
at com.endava.cats.CatsMain_ClientProxy.run(Unknown Source)
at io.quarkus.runtime.ApplicationLifecycleManager.run(ApplicationLifecycleManager.java:140)
at io.quarkus.runtime.Quarkus.run(Quarkus.java:71)
at io.quarkus.runtime.Quarkus.run(Quarkus.java:44)
at io.quarkus.runner.GeneratedMain.main(Unknown Source)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at io.quarkus.runner.bootstrap.StartupActionImpl$1.run(StartupActionImpl.java:116)
at java.base/java.lang.Thread.run(Thread.java:1570)

Expected behaviour
No Exeption

Environment:

• Key | Value
  ------------- | --------------------
  OS Name | Windows 11
  OS Version | 10.0
  OS Arch | amd64
  Binary Type | uber-jar
  Cats Version | 12.1.1-SNAPSHOT
  Cats Build | 2024-10-22T05:28:00Z
  Term Width | 80
  Term Type | unknown
  Shell | unknown

Additional context
What I saw:
When having a OpenAPI spec like this the example value in method formatExampleIfNeeded are still strings and cannot be casted
like in the code

• Date: example = "2018-10-09"
• DateTime: example = "2018-10-09T08:16:29.234Z"

But during tests in the cats project the objects ar already objects of the corresponding type, not strings

• Date: example = Date
• DateTime: example = OffsetDateTime