sf.tools.reflect

Class UnsafeUtils

java.lang.Object

sf.tools.reflect.UnsafeUtils

public final class UnsafeUtils
extends Object

使用sun.misc.Unsafe进行一些特殊操作的工具类

Author:

Constructor Summary

Constructors

Constructor and Description
UnsafeUtils()

Method Summary

Modifier and Type	Method and Description
static Class<?>	defineClass(String className, byte[] data, int i, int length, ClassLoader classLoader) 用指定的ClassLoader加载二进制数据为class, classLoader中自带该方法
static UnsafeWrapper	getUnsafe()
static <T> T	getValue(Object obj, long fieldOffset, Class<T> valueClz)
static <T> T	newInstance(Class<T> clz) 不使用反射直接创造对象，注意类的构造方法不会被执行
static long	objectFieldOffset(Field f)
static void	setValue(Object obj, long fieldOffset, Class<?> valueClz, Object value)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UnsafeUtils

public UnsafeUtils()

Method Detail

objectFieldOffset

public static long objectFieldOffset(Field f)

newInstance

public static final <T> T newInstance(Class<T> clz)

不使用反射直接创造对象，注意类的构造方法不会被执行

Parameters:

clz -

Returns:

被构造的对象

getUnsafe

public static UnsafeWrapper getUnsafe()

defineClass

public static final Class<?> defineClass(String className,
                                         byte[] data,
                                         int i,
                                         int length,
                                         ClassLoader classLoader)

用指定的ClassLoader加载二进制数据为class, classLoader中自带该方法

Parameters:

className -

data -

i -

length -

classLoader -

Returns:

setValue

public static final void setValue(Object obj,
                                  long fieldOffset,
                                  Class<?> valueClz,
                                  Object value)

Parameters:

obj -

fieldOffset -

valueClz -

value -

getValue

public static final <T> T getValue(Object obj,
                                   long fieldOffset,
                                   Class<T> valueClz)