org.springframework.core
Class MethodParameter

java.lang.Object
  org.springframework.core.MethodParameter

public class MethodParameter
extends Object

Helper class that encapsulates the specification of a method parameter, that is, a Method or Constructor plus a parameter index. Useful as a specification object to pass along.

Used by GenericCollectionTypeResolver, BeanWrapperImpl and AbstractBeanFactory.

Since:

2.0

Author:

Juergen Hoeller

See Also:

GenericCollectionTypeResolver, BeanWrapperImpl, AbstractBeanFactory

Constructor Summary

MethodParameter(Constructor constructor, int parameterIndex)
Create a new MethodParameter for the given constructor, with nesting level 1.

MethodParameter(Constructor constructor, int parameterIndex, int nestingLevel)
Create a new MethodParameter for the given constructor.

MethodParameter(Method method, int parameterIndex)
Create a new MethodParameter for the given method, with nesting level 1.

MethodParameter(Method method, int parameterIndex, int nestingLevel)
Create a new MethodParameter for the given method.

Method Summary

void	decreaseNestingLevel() Decrease this parameter's nesting level.
static MethodParameter	forMethodOrConstructor(Object methodOrConstructor, int parameterIndex) Create a new MethodParameter for the given method or constructor.
Constructor	getConstructor() Return the Constructor held, if any.
Method	getMethod() Return the Method held, if any.
int	getNestingLevel() Return the nesting level of the target type (typically 1; e.g. in case of a List of Lists, 1 would indicate the nested List, whereas 2 would indicate the element of the nested List).
int	getParameterIndex() Return the index of the method/constructor parameter.
void	increaseNestingLevel() Increase this parameter's nesting level.

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodParameter

public MethodParameter(Method method,
                       int parameterIndex)

Create a new MethodParameter for the given method, with nesting level 1.

Parameters:

method - the Method to specify a parameter for

parameterIndex - the index of the parameter

MethodParameter

public MethodParameter(Method method,
                       int parameterIndex,
                       int nestingLevel)

Create a new MethodParameter for the given method.

Parameters:

method - the Method to specify a parameter for

parameterIndex - the index of the parameter

nestingLevel - the nesting level of the target type (typically 1; e.g. in case of a List of Lists, 1 would indicate the nested List, whereas 2 would indicate the element of the nested List)

MethodParameter

public MethodParameter(Constructor constructor,
                       int parameterIndex)

Create a new MethodParameter for the given constructor, with nesting level 1.

Parameters:

constructor - the Constructor to specify a parameter for

parameterIndex - the index of the parameter

MethodParameter

public MethodParameter(Constructor constructor,
                       int parameterIndex,
                       int nestingLevel)

Create a new MethodParameter for the given constructor.

Parameters:

constructor - the Constructor to specify a parameter for

parameterIndex - the index of the parameter

nestingLevel - the nesting level of the target type (typically 1; e.g. in case of a List of Lists, 1 would indicate the nested List, whereas 2 would indicate the element of the nested List)

Method Detail

getMethod

public Method getMethod()

Return the Method held, if any.

Note: Either Method or Constructor is available.

Returns:

the Method, or null if none

getConstructor

public Constructor getConstructor()

Return the Constructor held, if any.

Note: Either Method or Constructor is available.

Returns:

the Constructor, or null if none

getParameterIndex

public int getParameterIndex()

Return the index of the method/constructor parameter.

Returns:

the parameter index (never negative)

getNestingLevel

public int getNestingLevel()

Return the nesting level of the target type (typically 1; e.g. in case of a List of Lists, 1 would indicate the nested List, whereas 2 would indicate the element of the nested List).

increaseNestingLevel

public void increaseNestingLevel()

Increase this parameter's nesting level.

See Also:

getNestingLevel()

decreaseNestingLevel

public void decreaseNestingLevel()

Decrease this parameter's nesting level.

See Also:

getNestingLevel()

forMethodOrConstructor

public static MethodParameter forMethodOrConstructor(Object methodOrConstructor,
                                                     int parameterIndex)

Create a new MethodParameter for the given method or constructor.

This is a convenience constructor for scenarios where a Method or Constructor reference is treated in a generic fashion.

Parameters:

methodOrConstructor - the Method or Constructor to specify a parameter for

parameterIndex - the index of the parameter