* only way to get a TypeVariable instance for the resolved types is to create our own. The
         * created TypeVariable will not interoperate with any JDK TypeVariable. But this is OK: We
         * don't _want_ our new TypeVariable to be equal to the JDK TypeVariable because it has
         * _different bounds_ than the JDK TypeVariable. And it wouldn't make sense for our new

  }

  private static <D extends GenericDeclaration> TypeVariable<D> newTypeVariableImpl(
      D genericDeclaration, String name, Type[] bounds) {
    TypeVariableImpl<D> typeVariableImpl = new TypeVariableImpl<>(genericDeclaration, name, bounds);
    @SuppressWarnings("unchecked")
    TypeVariable<D> typeVariable =
        Reflection.newProxy(
            TypeVariable.class, new TypeVariableInvocationHandler(typeVariableImpl));

    TypeVariable<?> noBoundJvmType = WithTypeVariable.getTypeVariable("withoutBound");
    TypeVariable<?> objectBoundJvmType = WithTypeVariable.getTypeVariable("withObjectBound");
    TypeVariable<?> upperBoundJvmType = WithTypeVariable.getTypeVariable("withUpperBound");
    TypeVariable<?> noBound = withBounds(noBoundJvmType);
    TypeVariable<?> objectBound = withBounds(objectBoundJvmType, Object.class);

     * @throws Exception
     */
    public void testGetTypeVariableMap() throws Exception {
        final Map<TypeVariable<?>, Type> map = GenericsUtil.getTypeVariableMap(Hoge.class);
        assertThat(map.size(), is(4));
        final Iterator<Entry<TypeVariable<?>, Type>> it = map.entrySet().iterator();
        Entry<TypeVariable<?>, Type> entry = it.next();
        assertThat(entry.getKey().getName(), is("T1"));

public abstract class TypeParameter<T> extends TypeCapture<T> {

  final TypeVariable<?> typeVariable;

  protected TypeParameter() {
    Type type = capture();
    checkArgument(type instanceof TypeVariable, "%s should be a type variable.", type);
    this.typeVariable = (TypeVariable<?>) type;
  }

  @Override
  public final int hashCode() {
    return typeVariable.hashCode();
  }

  @Override

import java.lang.reflect.Method;
import java.lang.reflect.TypeVariable;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link TypeParameter}.
 *
 * @author Ben Yu
 */
@NullUnmarked
public class TypeParameterTest extends TestCase {

  public <T> void testCaptureTypeParameter() throws Exception {
    TypeVariable<?> variable = new TypeParameter<T>() {}.typeVariable;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.Map;

import org.codelibs.core.beans.BeanDesc;
import org.codelibs.core.beans.ConstructorDesc;
import org.codelibs.core.beans.FieldDesc;
import org.codelibs.core.beans.MethodDesc;

    TypeVariable<?> typeVariable =
        (TypeVariable<?>) new WithGenericBound<String>() {}.getTargetType("withTypeVariable");
    assertEquals(String.class, typeVariable.getBounds()[0]);
  }

  public void testWithRecursiveBoundInTypeVariable() throws Exception {
    TypeVariable<?> typeVariable =

    TypeVariable<?> typeVariable =
        (TypeVariable<?>) new WithGenericBound<String>() {}.getTargetType("withTypeVariable");
    assertEquals(String.class, typeVariable.getBounds()[0]);
  }

  public void testWithRecursiveBoundInTypeVariable() throws Exception {
    TypeVariable<?> typeVariable =

import java.lang.reflect.Method;
import java.lang.reflect.TypeVariable;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link TypeParameter}.
 *
 * @author Ben Yu
 */
@NullUnmarked
public class TypeParameterTest extends TestCase {

  public <T> void testCaptureTypeParameter() throws Exception {
    TypeVariable<?> variable = new TypeParameter<T>() {}.typeVariable;