com.alibaba.dubbo.common.utils
Class ReflectUtils

java.lang.Object
  com.alibaba.dubbo.common.utils.ReflectUtils

public final class ReflectUtils
extends Object

ReflectUtils

Author:

qian.lei

Field Summary

static String	ARRAY_DESC
static String	CLASS_DESC
static Pattern	DESC_PATTERN
static String	DESC_REGEX
static Class<?>[]	EMPTY_CLASS_ARRAY
static Pattern	GETTER_METHOD_DESC_PATTERN
static Pattern	IS_HAS_CAN_METHOD_DESC_PATTERN
static String	JAVA_IDENT_REGEX
static String	JAVA_NAME_REGEX
static char	JVM_BOOLEAN boolean(Z).
static char	JVM_BYTE byte(B).
static char	JVM_CHAR char(C).
static char	JVM_DOUBLE double(D).
static char	JVM_FLOAT float(F).
static char	JVM_INT int(I).
static char	JVM_LONG long(J).
static char	JVM_SHORT short(S).
static char	JVM_VOID void(V).
static Pattern	METHOD_DESC_PATTERN
static String	METHOD_DESC_REGEX
static Pattern	SETTER_METHOD_DESC_PATTERN

Method Summary

static Class<?>	desc2class(String desc) desc to class.
static Class<?>[]	desc2classArray(String desc) get class array instance.
static String	desc2name(String desc) desc to name.
static Constructor<?>	findConstructor(Class<?> clazz, Class<?> paramType)
static Method	findMethodByMethodName(Class<?> clazz, String methodName)
static Method	findMethodByMethodSignature(Class<?> clazz, String methodName, String[] parameterTypes) 根据方法签名从类中找出方法。
static Class<?>	forName(String name)
static Class<?>	getBoxedClass(Class<?> c)
static String	getCodeBase(Class<?> cls)
static String	getDesc(Class<?> c) get class desc.
static String	getDesc(Class<?>[] cs) get class array desc.
static String	getDesc(Constructor<?> c) get constructor desc.
static String	getDesc(javassist.CtClass c) get class desc.
static String	getDesc(javassist.CtConstructor c) get constructor desc.
static String	getDesc(javassist.CtMethod m) get method desc.
static String	getDesc(Method m) get method desc.
static String	getDescWithoutMethodName(javassist.CtMethod m) get method desc.
static String	getDescWithoutMethodName(Method m) get method desc.
static Object	getEmptyObject(Class<?> returnType)
static Class<?>	getGenericClass(Class<?> cls)
static Class<?>	getGenericClass(Class<?> cls, int i)
static String	getName(Class<?> c) get name.
static String	getName(Constructor<?> c) get constructor name.
static String	getName(Method m) get method name.
static String	getPropertyNameFromBeanReadMethod(Method method)
static String	getPropertyNameFromBeanWriteMethod(Method method)
static String	getSignature(String methodName, Class<?>[] parameterTypes)
static boolean	isBeanPropertyReadMethod(Method method)
static boolean	isBeanPropertyWriteMethod(Method method)
static boolean	isCompatible(Class<?>[] cs, Object[] os) is compatible.
static boolean	isCompatible(Class<?> c, Object o) is compatible.
static boolean	isInstance(Object obj, String interfaceClazzName) 检查对象是否是指定接口的实现。
static boolean	isPrimitive(Class<?> cls)
static boolean	isPrimitives(Class<?> cls)
static boolean	isPublicInstanceField(Field field)
static Class<?>	name2class(String name) name to class.
static String	name2desc(String name) name to desc.

Methods inherited from class java.lang.Object

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

Field Detail

JVM_VOID

public static final char JVM_VOID

void(V).

See Also:

Constant Field Values

JVM_BOOLEAN

public static final char JVM_BOOLEAN

boolean(Z).

See Also:

Constant Field Values

JVM_BYTE

public static final char JVM_BYTE

byte(B).

See Also:

Constant Field Values

JVM_CHAR

public static final char JVM_CHAR

char(C).

See Also:

Constant Field Values

JVM_DOUBLE

public static final char JVM_DOUBLE

double(D).

See Also:

Constant Field Values

JVM_FLOAT

public static final char JVM_FLOAT

float(F).

See Also:

Constant Field Values

JVM_INT

public static final char JVM_INT

int(I).

See Also:

Constant Field Values

JVM_LONG

public static final char JVM_LONG

long(J).

See Also:

Constant Field Values

JVM_SHORT

public static final char JVM_SHORT

short(S).

See Also:

Constant Field Values

EMPTY_CLASS_ARRAY

public static final Class<?>[] EMPTY_CLASS_ARRAY

JAVA_IDENT_REGEX

public static final String JAVA_IDENT_REGEX

See Also:

Constant Field Values

JAVA_NAME_REGEX

public static final String JAVA_NAME_REGEX

See Also:

Constant Field Values

CLASS_DESC

public static final String CLASS_DESC

See Also:

Constant Field Values

ARRAY_DESC

public static final String ARRAY_DESC

See Also:

Constant Field Values

DESC_REGEX

public static final String DESC_REGEX

See Also:

Constant Field Values

DESC_PATTERN

public static final Pattern DESC_PATTERN

METHOD_DESC_REGEX

public static final String METHOD_DESC_REGEX

See Also:

Constant Field Values

METHOD_DESC_PATTERN

public static final Pattern METHOD_DESC_PATTERN

GETTER_METHOD_DESC_PATTERN

public static final Pattern GETTER_METHOD_DESC_PATTERN

SETTER_METHOD_DESC_PATTERN

public static final Pattern SETTER_METHOD_DESC_PATTERN

IS_HAS_CAN_METHOD_DESC_PATTERN

public static final Pattern IS_HAS_CAN_METHOD_DESC_PATTERN

Method Detail

isPrimitives

public static boolean isPrimitives(Class<?> cls)

isPrimitive

public static boolean isPrimitive(Class<?> cls)

getBoxedClass

public static Class<?> getBoxedClass(Class<?> c)

isCompatible

public static boolean isCompatible(Class<?> c,
                                   Object o)

is compatible.

Parameters:

c - class.

o - instance.

Returns:

compatible or not.

isCompatible

public static boolean isCompatible(Class<?>[] cs,
                                   Object[] os)

is compatible.

Parameters:

cs - class array.

os - object array.

Returns:

compatible or not.

getCodeBase

public static String getCodeBase(Class<?> cls)

getName

public static String getName(Class<?> c)

get name. java.lang.Object[][].class => "java.lang.Object[][]"

Parameters:

c - class.

Returns:

name.

getGenericClass

public static Class<?> getGenericClass(Class<?> cls)

getGenericClass

public static Class<?> getGenericClass(Class<?> cls,
                                       int i)

getName

public static String getName(Method m)

get method name. "void do(int)", "void do()", "int do(java.lang.String,boolean)"

Parameters:

m - method.

Returns:

name.

getSignature

public static String getSignature(String methodName,
                                  Class<?>[] parameterTypes)

getName

public static String getName(Constructor<?> c)

get constructor name. "()", "(java.lang.String,int)"

Parameters:

c - constructor.

Returns:

name.

getDesc

public static String getDesc(Class<?> c)

get class desc. boolean[].class => "[Z" Object.class => "Ljava/lang/Object;"

Parameters:

c - class.

Returns:

desc.

Throws:

javassist.NotFoundException

getDesc

public static String getDesc(Class<?>[] cs)

get class array desc. [int.class, boolean[].class, Object.class] => "I[ZLjava/lang/Object;"

Parameters:

cs - class array.

Returns:

desc.

Throws:

javassist.NotFoundException

getDesc

public static String getDesc(Method m)

get method desc. int do(int arg1) => "do(I)I" void do(String arg1,boolean arg2) => "do(Ljava/lang/String;Z)V"

Parameters:

m - method.

Returns:

desc.

getDesc

public static String getDesc(Constructor<?> c)

get constructor desc. "()V", "(Ljava/lang/String;I)V"

Parameters:

c - constructor.

Returns:

desc

getDescWithoutMethodName

public static String getDescWithoutMethodName(Method m)

get method desc. "(I)I", "()V", "(Ljava/lang/String;Z)V"

Parameters:

m - method.

Returns:

desc.

getDesc

public static String getDesc(javassist.CtClass c)
                      throws javassist.NotFoundException

get class desc. Object.class => "Ljava/lang/Object;" boolean[].class => "[Z"

Parameters:

c - class.

Returns:

desc.

Throws:

javassist.NotFoundException

getDesc

public static String getDesc(javassist.CtMethod m)
                      throws javassist.NotFoundException

get method desc. "do(I)I", "do()V", "do(Ljava/lang/String;Z)V"

Parameters:

m - method.

Returns:

desc.

Throws:

javassist.NotFoundException

getDesc

public static String getDesc(javassist.CtConstructor c)
                      throws javassist.NotFoundException

get constructor desc. "()V", "(Ljava/lang/String;I)V"

Parameters:

c - constructor.

Returns:

desc

Throws:

javassist.NotFoundException

getDescWithoutMethodName

public static String getDescWithoutMethodName(javassist.CtMethod m)
                                       throws javassist.NotFoundException

get method desc. "(I)I", "()V", "(Ljava/lang/String;Z)V".

Parameters:

m - method.

Returns:

desc.

Throws:

javassist.NotFoundException

name2desc

public static String name2desc(String name)

name to desc. java.util.Map[][] => "[[Ljava/util/Map;"

Parameters:

name - name.

Returns:

desc.

desc2name

public static String desc2name(String desc)

desc to name. "[[I" => "int[][]"

Parameters:

desc - desc.

Returns:

name.

forName

public static Class<?> forName(String name)

name2class

public static Class<?> name2class(String name)
                           throws ClassNotFoundException

name to class. "boolean" => boolean.class "java.util.Map[][]" => java.util.Map[][].class

Parameters:

name - name.

Returns:

Class instance.

Throws:

ClassNotFoundException

desc2class

public static Class<?> desc2class(String desc)
                           throws ClassNotFoundException

desc to class. "[Z" => boolean[].class "[[Ljava/util/Map;" => java.util.Map[][].class

Parameters:

desc - desc.

Returns:

Class instance.

Throws:

ClassNotFoundException

desc2classArray

public static Class<?>[] desc2classArray(String desc)
                                  throws ClassNotFoundException

get class array instance.

Parameters:

desc - desc.

Returns:

Class class array.

Throws:

ClassNotFoundException

findMethodByMethodSignature

public static Method findMethodByMethodSignature(Class<?> clazz,
                                                 String methodName,
                                                 String[] parameterTypes)
                                          throws NoSuchMethodException,
                                                 ClassNotFoundException

根据方法签名从类中找出方法。

Parameters:

clazz - 查找的类。

methodName - 方法签名，形如method1(int, String)。也允许只给方法名不参数只有方法名，形如method2。

Returns:

返回查找到的方法。

Throws:

NoSuchMethodException

ClassNotFoundException

IllegalStateException - 给定的方法签名找到多个方法（方法签名中没有指定参数，又有有重载的方法的情况）

findMethodByMethodName

public static Method findMethodByMethodName(Class<?> clazz,
                                            String methodName)
                                     throws NoSuchMethodException,
                                            ClassNotFoundException

Throws:

NoSuchMethodException

ClassNotFoundException

findConstructor

public static Constructor<?> findConstructor(Class<?> clazz,
                                             Class<?> paramType)
                                      throws NoSuchMethodException

Throws:

NoSuchMethodException

isInstance

public static boolean isInstance(Object obj,
                                 String interfaceClazzName)

检查对象是否是指定接口的实现。

不会触发到指定接口的Class，所以如果ClassLoader中没有指定接口类时，也不会出错。

Parameters:

obj - 要检查的对象

interfaceClazzName - 指定的接口名

Returns:

返回true，如果对象实现了指定接口；否则返回false。

getEmptyObject

public static Object getEmptyObject(Class<?> returnType)

isBeanPropertyReadMethod

public static boolean isBeanPropertyReadMethod(Method method)

getPropertyNameFromBeanReadMethod

public static String getPropertyNameFromBeanReadMethod(Method method)

isBeanPropertyWriteMethod

public static boolean isBeanPropertyWriteMethod(Method method)

getPropertyNameFromBeanWriteMethod

public static String getPropertyNameFromBeanWriteMethod(Method method)

isPublicInstanceField

public static boolean isPublicInstanceField(Field field)