[英]How to make ByteBuddy created sub-interface inherit type annotations?
我有這個偽測試來創建子接口,並且我想從接口S復制注釋,但是它不起作用。 我究竟做錯了什么?
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.attribute.MethodAttributeAppender;
import net.bytebuddy.implementation.attribute.TypeAttributeAppender;
import net.bytebuddy.matcher.ElementMatchers;
import org.apache.tapestry5.ioc.annotations.EagerLoad;
import org.apache.tapestry5.ioc.annotations.NotLazy;
public class InheritedMethodTest {
public static void main(String... args) throws Exception {
Method im = I.class.getMethod("list");
System.out.println(Arrays.toString(I.class.getAnnotations()));
System.out.println(im.getDeclaringClass());
System.out.println(im.getGenericReturnType());
System.out.println(Arrays.toString(im.getAnnotations()));
System.out.println();
Method sm = S.class.getMethod("list");
System.out.println(Arrays.toString(S.class.getAnnotations()));
System.out.println(sm.getDeclaringClass());
System.out.println(sm.getGenericReturnType());
System.out.println(Arrays.toString(sm.getAnnotations()));
System.out.println();
Class<? extends Object> f = new ByteBuddy()
.makeInterface(S.class)
.attribute(TypeAttributeAppender.ForInstrumentedType.INSTANCE)
.method(ElementMatchers.not(ElementMatchers
.isDeclaredBy(Object.class)))
.withoutCode()
.attribute(
MethodAttributeAppender.ForInstrumentedMethod.INCLUDING_RECEIVER)
.make()
.load(InheritedMethodTest.class.getClassLoader(),
ClassLoadingStrategy.Default.INJECTION).getLoaded();
Method fm = f.getMethod("list");
System.out.println(Arrays.toString(f.getAnnotations()));
System.out.println(fm.getDeclaringClass());
System.out.println(fm.getGenericReturnType());
System.out.println(Arrays.toString(fm.getAnnotations()));
System.out.println(Arrays.toString(f.getInterfaces()));
}
public static interface I<A> {
@NotLazy
List<A> list();
}
@EagerLoad
public static interface S extends I<String> {
}
}
更換
attribute(TypeAttributeAppender.ForInstrumentedType.INSTANCE)
命令
annotateType(S.class.getDeclaredAnnotations())
屬性附加器僅應用由檢測類型直接聲明的注釋。 如果使用潛在的多個超級接口創建接口,則無法復制注釋,因為如果多個接口聲明相同的注釋,則可能導致沖突。 請參閱TypeAttributeAppender.ForInstrumentedType
文檔以獲取有關屬性附加器的詳細說明。
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