程序包 cn.taketoday.core

类 ParameterNameDiscoverer

java.lang.Object

cn.taketoday.core.ParameterNameDiscoverer

直接已知子类:

CompositeParameterNameDiscoverer, LocalVariableTableParameterNameDiscoverer, ReflectiveParameterNameDiscoverer

public abstract class ParameterNameDiscoverer
extends Object

abstract class to discover parameter names for methods and constructors.

Parameter name discovery is not always possible, but various strategies are available to try, such as looking for debug information that may have been emitted at compile time, and looking for argname annotation values optionally accompanying AspectJ annotated methods.

从以下版本开始:

4.0

作者:

Rod Johnson, Adrian Colyer, TODAY 2021/9/10 22:33

构造器概要

构造器

构造器	说明
ParameterNameDiscoverer()

方法概要

修饰符和类型	方法	说明
protected String[]	doGet(Executable executable)
static String[]	findParameterNames(Executable executable)	Return parameter names for an Executable(method or constructor), or null if they cannot be determined.
String[]	getParameterNames(Executable executable)	Return parameter names for an Executable(method or constructor), or null if they cannot be determined.
static ParameterNameDiscoverer	getSharedInstance()	shared instance

从类继承的方法 java.lang.Object

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

构造器详细资料

ParameterNameDiscoverer

public ParameterNameDiscoverer()

方法详细资料

getParameterNames

@Nullable
public String[] getParameterNames(@Nullable
 Executable executable)

Return parameter names for an Executable(method or constructor), or null if they cannot be determined.

Individual entries in the array may be null if parameter names are only available for some parameters of the given method but not for others. However, it is recommended to use stub parameter names instead wherever feasible.

参数:

executable - the Executable(method or constructor) to find parameter names for

返回:

an array of parameter names if the names can be resolved, or null if they cannot

另请参阅:

• Executable.getParameterCount()

doGet

@Nullable
protected String[] doGet(Executable executable)

getSharedInstance

public static ParameterNameDiscoverer getSharedInstance()

shared instance

findParameterNames

@Nullable
public static String[] findParameterNames(@Nullable
 Executable executable)

Return parameter names for an Executable(method or constructor), or null if they cannot be determined.

Individual entries in the array may be null if parameter names are only available for some parameters of the given method but not for others. However, it is recommended to use stub parameter names instead wherever feasible.

参数:

executable - the Executable(method or constructor) to find parameter names for

返回:

an array of parameter names if the names can be resolved, or null if they cannot

另请参阅:

• Executable.getParameterCount()
• DefaultParameterNameDiscoverer
• getSharedInstance()