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java.lang.Object org.springframework.core.MethodParameter
public class MethodParameter
Helper class that encapsulates the specification of a method parameter, i.e. a Method or Constructor plus a parameter index and a nested type index for a declared generic type. Useful as a specification object to pass along.
Used by GenericCollectionTypeResolver
,
BeanWrapperImpl
and
AbstractBeanFactory
.
Note that this class does not depend on JDK 1.5 API artifacts, in order
to remain compatible with JDK 1.3/1.4. Concrete generic type resolution
via JDK 1.5 API happens in GenericCollectionTypeResolver
only.
GenericCollectionTypeResolver
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 | |
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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. |
Integer |
getTypeIndexForCurrentLevel()
Return the type index for the current nesting level. |
Integer |
getTypeIndexForLevel(int nestingLevel)
Return the type index for the specified nesting level. |
void |
increaseNestingLevel()
Increase this parameter's nesting level. |
void |
setTypeIndexForCurrentLevel(int typeIndex)
Set the type index for the current nesting level. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public MethodParameter(Method method, int parameterIndex)
method
- the Method to specify a parameter forparameterIndex
- the index of the parameterpublic MethodParameter(Method method, int parameterIndex, int nestingLevel)
method
- the Method to specify a parameter forparameterIndex
- the index of the parameter
(-1 for the method return type; 0 for the first method parameter,
1 for the second method parameter, etc)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)public MethodParameter(Constructor constructor, int parameterIndex)
constructor
- the Constructor to specify a parameter forparameterIndex
- the index of the parameterpublic MethodParameter(Constructor constructor, int parameterIndex, int nestingLevel)
constructor
- the Constructor to specify a parameter forparameterIndex
- the index of the parameternestingLevel
- 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 |
---|
public Method getMethod()
Note: Either Method or Constructor is available.
null
if nonepublic Constructor getConstructor()
Note: Either Method or Constructor is available.
null
if nonepublic int getParameterIndex()
public void increaseNestingLevel()
getNestingLevel()
public void decreaseNestingLevel()
getNestingLevel()
public int getNestingLevel()
public void setTypeIndexForCurrentLevel(int typeIndex)
typeIndex
- the corresponding type index
(or null
for the default type index)getNestingLevel()
public Integer getTypeIndexForCurrentLevel()
null
if none specified (indicating the default type index)getNestingLevel()
public Integer getTypeIndexForLevel(int nestingLevel)
nestingLevel
- the nesting level to check
null
if none specified (indicating the default type index)public static MethodParameter forMethodOrConstructor(Object methodOrConstructor, int parameterIndex)
This is a convenience constructor for scenarios where a Method or Constructor reference is treated in a generic fashion.
methodOrConstructor
- the Method or Constructor to specify a parameter forparameterIndex
- the index of the parameter
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