content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.spring.actuator.v2_0;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.returns;
  
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import java.util.ArrayList;
  import java.util.List;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.asm.Advice.AssignReturned;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  public class AutoConfigurationImportSelectorInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("org.springframework.boot.autoconfigure.AutoConfigurationImportSelector");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("getCandidateConfigurations").and(returns(List.class)),
          getClass().getName() + "$GetCandidateConfigurationsAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class GetCandidateConfigurationsAdvice {
  
      @AssignReturned.ToReturned
      @Advice.OnMethodExit(suppress = Throwable.class)
      public static List<String> onExit(@Advice.Return List<String> originalConfigurations) {
        List<String> configurations = originalConfigurations;
        if (configurations.contains(
            "org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration")) {
          List<String> configs = new ArrayList<>(configurations.size() + 1);
          configs.addAll(configurations);
          // using class reference here so that muzzle will consider it a dependency of this advice
          // and capture all references to spring & micrometer classes that it makes
          configs.add(OpenTelemetryMeterRegistryAutoConfiguration.class.getName());
          configurations = configs;
        }
        return configurations;
      }
    }
  }
  