assertThat(GenericsUtil.getActualClass(method.getGenericParameterTypes()[0], map), is(sameClass(Integer.class)));
        assertThat(GenericsUtil.getActualClass(method.getGenericReturnType(), map), is(sameClass(Long.class)));

        method = Hoge.class.getMethod("array");
        assertThat(GenericsUtil.getActualClass(method.getGenericReturnType(), map), is(sameClass(String[].class)));

     * @return the actual class of the specified type
     */
    public static Class<?> getActualClass(final Type type, final Map<TypeVariable<?>, Type> map) {
        return switch (type) {
        case Class<?> clazz -> clazz;
        case ParameterizedType paramType -> getActualClass(paramType.getRawType(), map);
        case WildcardType wildcard -> getActualClass(wildcard.getUpperBounds()[0], map);

import static org.codelibs.core.collection.CollectionsUtil.newHashMap;
import static org.codelibs.core.collection.CollectionsUtil.newHashSet;
import static org.codelibs.core.lang.GenericsUtil.getActualClass;
import static org.codelibs.core.lang.GenericsUtil.getGenericParameters;
import static org.codelibs.core.lang.GenericsUtil.getTypeVariableMap;
import static org.codelibs.core.misc.AssertionUtil.assertArgumentArrayIndex;