content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package field;
  
  import static java.util.Collections.singletonList;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  import com.google.auto.service.AutoService;
  import io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import java.util.List;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  @AutoService(InstrumentationModule.class)
  public class VirtualFieldTestInstrumentationModule extends InstrumentationModule {
    public VirtualFieldTestInstrumentationModule() {
      super("virtual-field-test");
    }
  
    @Override
    public List<TypeInstrumentation> typeInstrumentations() {
      return singletonList(new TestInstrumentation());
    }
  
    @Override
    public boolean isHelperClass(String className) {
      return className.startsWith("field.VirtualFieldTestHelper");
    }
  
    private static class TestInstrumentation implements TypeInstrumentation {
  
      @Override
      public ElementMatcher<TypeDescription> typeMatcher() {
        return named("field.VirtualFieldTest");
      }
  
      @Override
      public void transform(TypeTransformer transformer) {
        transformer.applyAdviceToMethod(
            named("virtualFieldTestMethod"),
            VirtualFieldTestInstrumentationModule.class.getName() + "$TestAdvice");
      }
    }
  
    @SuppressWarnings("unused")
    public static class TestAdvice {
      @Advice.OnMethodExit
      public static void onExit(@Advice.Return(readOnly = false) boolean result) {
        VirtualFieldTestHelper.test();
        result = true;
      }
    }
  }
  