[BUG] custom analyzers not supported

What is the bug?

while there's the generated Analyzer class it does not list all analyzers (e.g. phone and phone-search, introduced with 2.18, are not yet present there) and i'm also not sure how that should be used with spring-data-opensearch' @Field annotation (which takes a string, not an enum).
when using a string in the annotation, e.g. @Field(type = FieldType.Text, analyzer = "phone", searchAnalyzer = "phone-search") this works fine with ORHLC, but it fails when switching to opensearch-java:

Missing required property 'Builder.<variant kind>'
org.opensearch.client.util.MissingRequiredPropertyException: Missing required property 'Builder.<variant kind>'
	at app//org.opensearch.client.util.ApiTypeHelper.requireNonNull(ApiTypeHelper.java:90)
	at app//org.opensearch.client.opensearch._types.analysis.Analyzer.<init>(Analyzer.java:131)
	at app//org.opensearch.client.opensearch._types.analysis.Analyzer.<init>(Analyzer.java:53)
	at app//org.opensearch.client.opensearch._types.analysis.Analyzer$Builder.build(Analyzer.java:585)
	at app//org.opensearch.client.json.BuildFunctionDeserializer.deserialize(BuildFunctionDeserializer.java:60)
	at app//org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at app//org.opensearch.client.json.JsonpDeserializerBase$StringMapDeserializer.deserialize(JsonpDeserializerBase.java:369)
	at app//org.opensearch.client.json.JsonpDeserializerBase$StringMapDeserializer.deserialize(JsonpDeserializerBase.java:355)
	at app//org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at app//org.opensearch.client.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:81)
	at app//org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:185)
	at app//org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at app//org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at app//org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:91)
	at app//org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at app//org.opensearch.client.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:81)
	at app//org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:185)
	at app//org.opensearch.client.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:146)
	at app//org.opensearch.client.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:87)
	at app//org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:91)
	at app//org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)
	at app//org.opensearch.data.client.osc.JsonpUtils.fromJson(JsonpUtils.java:67)
	at app//org.opensearch.data.client.osc.TypeUtils.indexSettings(TypeUtils.java:476)
	at app//org.opensearch.data.client.osc.RequestConverter.indicesCreateRequest(RequestConverter.java:255)
	at app//org.opensearch.data.client.osc.IndicesTemplate.doCreate(IndicesTemplate.java:138)
	at app//org.opensearch.data.client.osc.IndicesTemplate.create(IndicesTemplate.java:115)
	at app//com.avaloq.rmw.globalsearch.configuration.AutoIndexMappingConfiguration.createIndexMappingsOnStartup(AutoIndexMappingConfiguration.java:94)
	at app//com.avaloq.rmw.globalsearch.configuration.AutoIndexMappingConfiguration.runOnStartup(AutoIndexMappingConfiguration.java:59)
	at java.base@21.0.5/java.lang.reflect.Method.invoke(Method.java:580)
	at app//org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:359)
	at app//org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196)
	at app//org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at app//org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
	at app//com.avaloq.rmw.globalsearch.aspect.LoggingAspect.logMethodStartAndEndExecution(LoggingAspect.java:27)
	at java.base@21.0.5/java.lang.reflect.Method.invoke(Method.java:580)
	at app//org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:642)
	at app//org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:632)
	at app//org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:71)
	at app//org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)
	at app//org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
	at app//org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)
	at app//org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:727)
	at app//com.avaloq.rmw.globalsearch.configuration.AutoIndexMappingConfiguration$$SpringCGLIB$$0.runOnStartup(<generated>)
	at java.base@21.0.5/java.lang.reflect.Method.invoke(Method.java:580)
	at app//org.springframework.context.event.ApplicationListenerMethodAdapter.doInvoke(ApplicationListenerMethodAdapter.java:382)
	at app//org.springframework.context.event.ApplicationListenerMethodAdapter.processEvent(ApplicationListenerMethodAdapter.java:254)
	at app//org.springframework.context.event.ApplicationListenerMethodAdapter.onApplicationEvent(ApplicationListenerMethodAdapter.java:173)
	at app//org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
	at app//org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
	at app//org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
	at app//org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:454)
	at app//org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:387)
	at app//org.springframework.boot.context.event.EventPublishingRunListener.started(EventPublishingRunListener.java:103)
	at app//org.springframework.boot.SpringApplicationRunListeners.lambda$started$5(SpringApplicationRunListeners.java:76)
	at java.base@21.0.5/java.lang.Iterable.forEach(Iterable.java:75)
	at app//org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
	at app//org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
	at app//org.springframework.boot.SpringApplicationRunListeners.started(SpringApplicationRunListeners.java:76)
	at app//org.springframework.boot.SpringApplication.run(SpringApplication.java:324)
	at app//org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$3(SpringBootContextLoader.java:137)
	at app//org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:58)
	at app//org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:46)
	at app//org.springframework.boot.SpringApplication.withHook(SpringApplication.java:1461)
	at app//org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run(SpringBootContextLoader.java:553)
	at app//org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:137)
	at app//org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:108)
	at app//org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:225)
	at app//org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:152)
	at app//org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:130)
	at app//org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:200)
	at app//org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:139)
	at app//org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:260)
	at app//org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:160)
	at java.base@21.0.5/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
	at java.base@21.0.5/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base@21.0.5/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)
	at java.base@21.0.5/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
	at java.base@21.0.5/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1708)
	at java.base@21.0.5/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
	at java.base@21.0.5/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
	at java.base@21.0.5/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.base@21.0.5/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.base@21.0.5/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base@21.0.5/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
	at java.base@21.0.5/java.util.Optional.orElseGet(Optional.java:364)
	at java.base@21.0.5/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base@21.0.5/java.util.ArrayList.forEach(ArrayList.java:1596)

the error message is completely unclear and it's not obvious that this is due to the analyzer.

How can one reproduce the bug?

try to use the phone analyzer on a field using spring-data-opensearch with opensearch-java.

What is the expected behavior?

it is possible to use all analyzers, regardless of whether they are built-in or custom (e.g. by defining one in settings.analysis.analyzer and using that e.g. using @Setting in spring-data-opensearch).

What is your host/environment?

• spring-data-opensearch:1.6.2
• opensearch-java:2.22.0

Do you have any screenshots?

n/a

Do you have any additional context?

#779 is related to this.

Start with java-client/src/generated/java/org/opensearch/client/opensearch/_types/analysis/Analyzer.java and trace deserialization through TypeUtils.indexSettings and RequestConverter.indicesCreateRequest. Reproduce the phone analyzer case with spring-data-opensearch, then verify that built-in and custom analyzer names can be used without the unclear MissingRequiredPropertyException.