Package org.springframework.core

Class StandardReflectionParameterNameDiscoverer

java.lang.Object

org.springframework.core.StandardReflectionParameterNameDiscoverer

All Implemented Interfaces:

ParameterNameDiscoverer

public class StandardReflectionParameterNameDiscoverer
extends Object
implements ParameterNameDiscoverer

ParameterNameDiscoverer implementation which uses JDK 8's reflection facilities for introspecting parameter names (based on the "-parameters" compiler flag).

This is a key element of DefaultParameterNameDiscoverer where it is being combined with KotlinReflectionParameterNameDiscoverer if Kotlin is present.

Since:

4.0

Author:

Juergen Hoeller

See Also:

• Executable.getParameters()
• Parameter.getName()
• KotlinReflectionParameterNameDiscoverer
• DefaultParameterNameDiscoverer

Constructor Summary

Constructors

Constructor	Description
StandardReflectionParameterNameDiscoverer()

Method Summary

Modifier and Type	Method	Description
String[]	getParameterNames(Constructor<?> ctor)	Return parameter names for a constructor, or null if they cannot be determined.
String[]	getParameterNames(Method method)	Return parameter names for a method, or null if they cannot be determined.

Methods inherited from class java.lang.Object

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

Constructor Details

StandardReflectionParameterNameDiscoverer

public StandardReflectionParameterNameDiscoverer()

Method Details

getParameterNames

@Nullable
public String[] getParameterNames(Method method)

Description copied from interface: ParameterNameDiscoverer

Return parameter names for a method, 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.

Specified by:

getParameterNames in interface ParameterNameDiscoverer

Parameters:

method - the method to find parameter names for

Returns:

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

getParameterNames

@Nullable
public String[] getParameterNames(Constructor<?> ctor)

Description copied from interface: ParameterNameDiscoverer

Return parameter names for a 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 constructor but not for others. However, it is recommended to use stub parameter names instead wherever feasible.

Specified by:

getParameterNames in interface ParameterNameDiscoverer

Parameters:

ctor - the constructor to find parameter names for

Returns:

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