content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package instrumentation;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  import io.opentelemetry.instrumentation.api.util.VirtualField;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  public class TestTypeInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("TestClass");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("testMethod"), TestTypeInstrumentation.class.getName() + "$TestAdvice");
      transformer.applyAdviceToMethod(
          named("testMethod2"), TestTypeInstrumentation.class.getName() + "$Test2Advice");
    }
  
    @SuppressWarnings("unused")
    public static class TestAdvice {
  
      @Advice.OnMethodExit
      public static void methodExit(
          @Advice.This Runnable test, @Advice.Return(readOnly = false) String result) {
        VirtualField.find(Runnable.class, String.class).set(test, "instrumented");
        result = "instrumented";
      }
    }
  
    @SuppressWarnings("unused")
    public static class Test2Advice {
  
      @Advice.OnMethodExit
      public static void methodExit(
          @Advice.This Runnable test, @Advice.Return(readOnly = false) String result) {
        result = VirtualField.find(Runnable.class, String.class).get(test);
      }
    }
  }
  