java.lang.invoke.MethodHandle.invokeWithArguments()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中java.lang.invoke.MethodHandle.invokeWithArguments()方法的一些代码示例，展示了MethodHandle.invokeWithArguments()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。MethodHandle.invokeWithArguments()方法的具体详情如下：
包路径：java.lang.invoke.MethodHandle
类名称：MethodHandle
方法名：invokeWithArguments

MethodHandle.invokeWithArguments介绍

[英]Performs a variable arity invocation, passing the arguments in the given array to the method handle, as if via an inexact #invoke from a call site which mentions only the type Object, and whose arity is the length of the argument array.

This method is also equivalent to the following code:

  1. invokeWithArguments(arguments.toArray()

[中]执行变量arity调用，将给定数组中的参数传递给方法句柄，就像通过调用站点的不精确#调用一样，调用站点只提到类型对象，其arity是参数数组的长度。
此方法也相当于以下代码：

  1. invokeWithArguments(arguments.toArray()

代码示例

代码示例来源：origin: org.codehaus.groovy/groovy

  1. @Override
  2.   public Object invokeHandle(Object handle, Object[] args) throws Throwable {
  3.     MethodHandle mh = (MethodHandle) handle;
  4.     return mh.invokeWithArguments(args);
  5.   }
  6. }

代码示例来源：origin: square/retrofit

  1. @Override Object invokeDefaultMethod(Method method, Class<?> declaringClass, Object object,
  2.   @Nullable Object... args) throws Throwable {
  3.  // Because the service interface might not be public, we need to use a MethodHandle lookup
  4.  // that ignores the visibility of the declaringClass.
  5.  Constructor<Lookup> constructor = Lookup.class.getDeclaredConstructor(Class.class, int.class);
  6.  constructor.setAccessible(true);
  7.  return constructor.newInstance(declaringClass, -1 /* trusted */)
  8.    .unreflectSpecial(method, declaringClass)
  9.    .bindTo(object)
  10.    .invokeWithArguments(args);
  11. }

代码示例来源：origin: org.objenesis/objenesis

  1. @Override
  2.  Class<?> defineClass(String className, byte[] b, int off, int len, Class<?> neighbor, ClassLoader loader, ProtectionDomain protectionDomain) {
  3.    try {
  4.     Object module = getModule.invokeWithArguments(DefineClassHelper.class);
  5.     Object neighborModule = getModule.invokeWithArguments(neighbor);
  6.     addReads.invokeWithArguments(module, neighborModule);
  7.     MethodHandles.Lookup prvlookup = (MethodHandles.Lookup) privateLookupIn.invokeExact(neighbor, lookup);
  8.     return (Class<?>) defineClass.invokeExact(prvlookup, b);
  9.    } catch (Throwable e) {
  10.     throw new ObjenesisException(neighbor.getName() + " has no permission to define the class", e);
  11.    }
  12.  }
  13. }

代码示例来源：origin: baomidou/mybatis-plus

  1. private Object invokeDefaultMethod(Object proxy, Method method, Object[] args)
  2.   throws Throwable {
  3.   final Constructor<MethodHandles.Lookup> constructor = MethodHandles.Lookup.class
  4.     .getDeclaredConstructor(Class.class, int.class);
  5.   if (!constructor.isAccessible()) {
  6.     constructor.setAccessible(true);
  7.   }
  8.   final Class<?> declaringClass = method.getDeclaringClass();
  9.   return constructor
  10.     .newInstance(declaringClass,
  11.       MethodHandles.Lookup.PRIVATE | MethodHandles.Lookup.PROTECTED
  12.         | MethodHandles.Lookup.PACKAGE | MethodHandles.Lookup.PUBLIC)
  13.     .unreflectSpecial(method, declaringClass).bindTo(proxy).invokeWithArguments(args);
  14. }

代码示例来源：origin: runelite/runelite

  1. static Object callDefaultMethod(Object proxy, Method method, Object[] args) throws Throwable
  2.   {
  3.     // Call the default method implementation - https://rmannibucau.wordpress.com/2014/03/27/java-8-default-interface-methods-and-jdk-dynamic-proxies/
  4.     Constructor<MethodHandles.Lookup> constructor = MethodHandles.Lookup.class.getDeclaredConstructor(Class.class, int.class);
  5.     constructor.setAccessible(true);
  7.     Class<?> declaringClass = method.getDeclaringClass();
  8.     return constructor.newInstance(declaringClass, MethodHandles.Lookup.PUBLIC | MethodHandles.Lookup.PRIVATE)
  9.       .unreflectSpecial(method, declaringClass)
  10.       .bindTo(proxy)
  11.       .invokeWithArguments(args);
  12.   }
  13. }

代码示例来源：origin: com.squareup.retrofit2/retrofit

  1. @Override Object invokeDefaultMethod(Method method, Class<?> declaringClass, Object object,
  2.   @Nullable Object... args) throws Throwable {
  3.  // Because the service interface might not be public, we need to use a MethodHandle lookup
  4.  // that ignores the visibility of the declaringClass.
  5.  Constructor<Lookup> constructor = Lookup.class.getDeclaredConstructor(Class.class, int.class);
  6.  constructor.setAccessible(true);
  7.  return constructor.newInstance(declaringClass, -1 /* trusted */)
  8.    .unreflectSpecial(method, declaringClass)
  9.    .bindTo(object)
  10.    .invokeWithArguments(args);
  11. }

代码示例来源：origin: org.javassist/javassist

  1. @Override
  2.   Package definePackage(ClassLoader loader, String name, String specTitle,
  3.         String specVersion, String specVendor, String implTitle, String implVersion,
  4.         String implVendor, URL sealBase)
  5.     throws IllegalArgumentException
  6.   {
  7.     if (stack.getCallerClass() != DefinePackageHelper.class)
  8.       throw new IllegalAccessError("Access denied for caller.");
  9.     try {
  10.       return (Package) definePackage.invokeWithArguments(loader, name, specTitle,
  11.           specVersion, specVendor, implTitle, implVersion, implVendor, sealBase);
  12.     } catch (Throwable e) {
  13.       if (e instanceof IllegalArgumentException) throw (IllegalArgumentException) e;
  14.       if (e instanceof RuntimeException) throw (RuntimeException) e;
  15.     }
  16.     return null;
  17.   }
  18. }

代码示例来源：origin: scouter-project/scouter

  1. @Override
  2.   Package definePackage(ClassLoader loader, String name, String specTitle,
  3.         String specVersion, String specVendor, String implTitle, String implVersion,
  4.         String implVendor, URL sealBase)
  5.     throws IllegalArgumentException
  6.   {
  7.     if (stack.getCallerClass() != DefinePackageHelper.class)
  8.       throw new IllegalAccessError("Access denied for caller.");
  9.     try {
  10.       return (Package) definePackage.invokeWithArguments(loader, name, specTitle,
  11.           specVersion, specVendor, implTitle, implVersion, implVendor, sealBase);
  12.     } catch (Throwable e) {
  13.       if (e instanceof IllegalArgumentException) throw (IllegalArgumentException) e;
  14.       if (e instanceof RuntimeException) throw (RuntimeException) e;
  15.     }
  16.     return null;
  17.   }
  18. }

代码示例来源：origin: jdbi/jdbi

  1. private static <T extends SqlParser> Supplier<T> tryConstructor(Class<T> clazz, Object... args) {
  2.     return () -> {
  3.       try {
  4.         Object[] nonNullArgs = Arrays.stream(args).filter(Objects::nonNull).toArray(Object[]::new);
  5.         Class[] argClasses = Arrays.stream(nonNullArgs).map(Object::getClass).toArray(Class[]::new);
  6.         MethodType type = MethodType.methodType(void.class, argClasses);
  7.         return (T) MethodHandles.lookup().findConstructor(clazz, type).invokeWithArguments(nonNullArgs);
  8.       } catch (NoSuchMethodException ignored) {
  9.         return null;
  10.       } catch (Throwable t) {
  11.         throw Sneaky.throwAnyway(t);
  12.       }
  13.     };
  14.   }
  15. }

代码示例来源：origin: org.javassist/javassist

  1. Class<?> defineClass(String name, byte[] b, int off, int len,
  2.              ClassLoader loader, ProtectionDomain protectionDomain)
  3.     throws ClassFormatError
  4.   {
  5.     try {
  6.       if (getCallerClass.invoke(stack) != Java9.class)
  7.         throw new IllegalAccessError("Access denied for caller.");
  8.     } catch (Exception e) {
  9.       throw new RuntimeException("cannot initialize", e);
  10.     }
  11.     try {
  12.       return (Class<?>) defineClass.invokeWithArguments(
  13.             sunMiscUnsafeTheUnsafe.theUnsafe,
  14.             name, b, off, len, loader, protectionDomain);
  15.     } catch (Throwable e) {
  16.       if (e instanceof RuntimeException) throw (RuntimeException) e;
  17.       if (e instanceof ClassFormatError) throw (ClassFormatError) e;
  18.       throw new ClassFormatError(e.getMessage());
  19.     }
  20.   }
  21. }

代码示例来源：origin: jdbi/jdbi

  1. private static <T extends TemplateEngine> Supplier<T> tryConstructor(Class<T> clazz, Object... args) {
  2.     return () -> {
  3.       try {
  4.         Object[] nonNullArgs = Arrays.stream(args).filter(Objects::nonNull).toArray(Object[]::new);
  5.         Class[] argClasses = Arrays.stream(nonNullArgs).map(Object::getClass).toArray(Class[]::new);
  6.         MethodType type = MethodType.methodType(void.class, argClasses);
  7.         return (T) MethodHandles.lookup().findConstructor(clazz, type).invokeWithArguments(nonNullArgs);
  8.       } catch (NoSuchMethodException ignored) {
  9.         return null;
  10.       } catch (Throwable t) {
  11.         throw Sneaky.throwAnyway(t);
  12.       }
  13.     };
  14.   }
  15. }

代码示例来源：origin: oracle/helidon

  1. public T create(Config configNode) {
  2.   List<Object> args = createArguments(configNode);
  3.   try {
  4.     Object obj = handle.invokeWithArguments(args);
  5.     return type.cast(obj);
  6.   } catch (ConfigException ex) {
  7.     throw ex;
  8.   } catch (Throwable throwable) {
  9.     throw new ConfigException("Unable to create '" + type.getName() + "' instance.", throwable);
  10.   }
  11. }

代码示例来源：origin: org.javassist/javassist

  1. @Override
  2.   Class<?> defineClass(String name, byte[] b, int off, int len, Class<?> neighbor,
  3.       ClassLoader loader, ProtectionDomain protectionDomain)
  4.     throws ClassFormatError
  5.   {
  6.     if (stack.getCallerClass() != DefineClassHelper.class)
  7.       throw new IllegalAccessError("Access denied for caller.");
  8.     try {
  9.       return (Class<?>) defineClass.invokeWithArguments(
  10.             loader, name, b, off, len, protectionDomain);
  11.     } catch (Throwable e) {
  12.       if (e instanceof RuntimeException) throw (RuntimeException) e;
  13.       if (e instanceof ClassFormatError) throw (ClassFormatError) e;
  14.       throw new ClassFormatError(e.getMessage());
  15.     }
  16.   }
  17. }

代码示例来源：origin: scouter-project/scouter

  1. @Override
  2.   Class<?> defineClass(String name, byte[] b, int off, int len, Class<?> neighbor,
  3.       ClassLoader loader, ProtectionDomain protectionDomain)
  4.     throws ClassFormatError
  5.   {
  6.     if (stack.getCallerClass() != DefineClassHelper.class)
  7.       throw new IllegalAccessError("Access denied for caller.");
  8.     try {
  9.       return (Class<?>) defineClass.invokeWithArguments(
  10.             loader, name, b, off, len, protectionDomain);
  11.     } catch (Throwable e) {
  12.       if (e instanceof RuntimeException) throw (RuntimeException) e;
  13.       if (e instanceof ClassFormatError) throw (ClassFormatError) e;
  14.       throw new ClassFormatError(e.getMessage());
  15.     }
  16.   }
  17. }

代码示例来源：origin: prestodb/presto

  1. private static long getReferenceCountMapOverhead(TestComplexState state)
  2. {
  3.   long overhead = 0;
  4.   // reflection is necessary because TestComplexState implementation is generated
  5.   Field[] stateFields = state.getClass().getDeclaredFields();
  6.   try {
  7.     for (Field stateField : stateFields) {
  8.       if (stateField.getType() != BlockBigArray.class && stateField.getType() != SliceBigArray.class) {
  9.         continue;
  10.       }
  11.       stateField.setAccessible(true);
  12.       Field[] bigArrayFields = stateField.getType().getDeclaredFields();
  13.       for (Field bigArrayField : bigArrayFields) {
  14.         if (bigArrayField.getType() != ReferenceCountMap.class) {
  15.           continue;
  16.         }
  17.         bigArrayField.setAccessible(true);
  18.         MethodHandle sizeOf = Reflection.methodHandle(bigArrayField.getType(), "sizeOf");
  19.         overhead += (long) sizeOf.invokeWithArguments(bigArrayField.get(stateField.get(state)));
  20.       }
  21.     }
  22.   }
  23.   catch (Throwable t) {
  24.     throw new RuntimeException(t);
  25.   }
  26.   return overhead;
  27. }

代码示例来源：origin: robolectric/robolectric

  1. @SuppressWarnings({"unchecked", "TypeParameterUnusedInFormals"})
  2.  private static <T> T invokeDynamic(
  3.    Class<?> cls, String methodName, Class<?> returnType, ClassParameter<?>... params)
  4.    throws Throwable {
  5.   MethodType methodType =
  6.     MethodType.methodType(
  7.       returnType, Arrays.stream(params).map(param -> param.clazz).toArray(Class[]::new));
  8.   CallSite callsite =
  9.     InvokeDynamicSupport.bootstrapIntrinsic(
  10.       MethodHandles.lookup(), methodName, methodType, cls.getName());
  11.   return (T)
  12.     callsite
  13.       .dynamicInvoker()
  14.       .invokeWithArguments(
  15.         Arrays.stream(params).map(param -> param.val).collect(Collectors.toList()));
  16.  }
  17. }

代码示例来源：origin: prestodb/presto

  1. private long getComplexStateRetainedSize(TestComplexState state)
  2. {
  3.   long retainedSize = ClassLayout.parseClass(state.getClass()).instanceSize();
  4.   // reflection is necessary because TestComplexState implementation is generated
  5.   Field[] fields = state.getClass().getDeclaredFields();
  6.   try {
  7.     for (Field field : fields) {
  8.       Class type = field.getType();
  9.       field.setAccessible(true);
  10.       if (type == BlockBigArray.class || type == BooleanBigArray.class || type == SliceBigArray.class ||
  11.           type == ByteBigArray.class || type == DoubleBigArray.class || type == LongBigArray.class || type == IntBigArray.class) {
  12.         MethodHandle sizeOf = Reflection.methodHandle(type, "sizeOf");
  13.         retainedSize += (long) sizeOf.invokeWithArguments(field.get(state));
  14.       }
  15.     }
  16.   }
  17.   catch (Throwable t) {
  18.     throw new RuntimeException(t);
  19.   }
  20.   return retainedSize;
  21. }

代码示例来源：origin: lettuce-io/lettuce-core

  1. @Override
  2. public Object invoke(MethodInvocation invocation) throws Throwable {
  3.   Method method = invocation.getMethod();
  4.   if (!method.isDefault()) {
  5.     return invocation.proceed();
  6.   }
  7.   LettuceAssert.isTrue(invocation instanceof InvocationTargetProvider,
  8.       "Invocation must provide a target object via InvocationTargetProvider");
  9.   InvocationTargetProvider targetProvider = (InvocationTargetProvider) invocation;
  10.   return methodHandleCache.computeIfAbsent(method, DefaultMethodInvokingInterceptor::lookupMethodHandle)
  11.       .bindTo(targetProvider.getInvocationTarget()).invokeWithArguments(invocation.getArguments());
  12. }

代码示例来源：origin: prestodb/presto

  1. return method.invokeWithArguments(actualArguments);

代码示例来源：origin: prestodb/presto

  1. @Override
  2. protected Object visitArithmeticUnary(ArithmeticUnaryExpression node, Object context)
  3. {
  4.   Object value = process(node.getValue(), context);
  5.   if (value == null) {
  6.     return null;
  7.   }
  8.   if (value instanceof Expression) {
  9.     return new ArithmeticUnaryExpression(node.getSign(), toExpression(value, type(node.getValue())));
  10.   }
  11.   switch (node.getSign()) {
  12.     case PLUS:
  13.       return value;
  14.     case MINUS:
  15.       Signature operatorSignature = metadata.getFunctionRegistry().resolveOperator(OperatorType.NEGATION, types(node.getValue()));
  16.       MethodHandle handle = metadata.getFunctionRegistry().getScalarFunctionImplementation(operatorSignature).getMethodHandle();
  17.       if (handle.type().parameterCount() > 0 && handle.type().parameterType(0) == ConnectorSession.class) {
  18.         handle = handle.bindTo(session);
  19.       }
  20.       try {
  21.         return handle.invokeWithArguments(value);
  22.       }
  23.       catch (Throwable throwable) {
  24.         throwIfInstanceOf(throwable, RuntimeException.class);
  25.         throwIfInstanceOf(throwable, Error.class);
  26.         throw new RuntimeException(throwable.getMessage(), throwable);
  27.       }
  28.   }
  29.   throw new UnsupportedOperationException("Unsupported unary operator: " + node.getSign());
  30. }

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