Add null guards 3

[jack-berg]

Related to #8802.

See #8863 description for methodology.

• io.opentelemetry.api.metrics.Meter
• io.opentelemetry.api.metrics.MeterProvider
• io.opentelemetry.api.trace.ArrayBasedTraceState
• io.opentelemetry.api.trace.ArrayBasedTraceStateBuilder
• io.opentelemetry.api.trace.DefaultTracer
• io.opentelemetry.api.trace.DefaultTracerBuilder
• io.opentelemetry.api.trace.DefaultTracerProvider
• io.opentelemetry.api.trace.PropagatedSpan
• io.opentelemetry.api.trace.SpanBuilder
• io.opentelemetry.api.trace.SpanContext

[opentelemetry-pr-dashboard]

Pull request dashboard status

Merged · refreshed 2026-10-16 20:26 UTC

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[codecov]

Codecov Report

❌ Patch coverage is 18.62745% with 83 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.40%. Comparing base (45b9ed4) to head (831a65d).
⚠️ Report is 29 commits behind head on main.

Files with missing lines	Patch %	Lines
...ava/io/opentelemetry/api/trace/PropagatedSpan.java	11.11%	20 Missing and 20 partials ⚠️
...n/java/io/opentelemetry/api/trace/SpanContext.java	0.00%	16 Missing and 8 partials ⚠️
.../main/java/io/opentelemetry/api/metrics/Meter.java	0.00%	6 Missing ⚠️
...opentelemetry/api/trace/DefaultTracerProvider.java	0.00%	3 Missing and 3 partials ⚠️
.../opentelemetry/api/trace/DefaultTracerBuilder.java	0.00%	2 Missing and 2 partials ⚠️
...n/java/io/opentelemetry/api/trace/SpanBuilder.java	50.00%	2 Missing and 1 partial ⚠️

❌ Your patch check has failed because the patch coverage (18.62%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8913      +/-   ##
============================================
- Coverage     90.55%   90.40%   -0.15%     
- Complexity    10702    10895     +193     
============================================
  Files          1007     1015       +8     
  Lines         29145    29841     +696     
  Branches       3760     3895     +135     
============================================
+ Hits          26392    26979     +587     
- Misses         1851     1910      +59     
- Partials        902      952      +50     

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[breedx-splk]

Looks good. I left a few comments before seeing the remark in the api-design.md, so that seems intentional after all.