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java.lang.Objectorg.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.
GenericCollectionTypeResolver
Constructor Summary | |
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MethodParameter(java.lang.reflect.Constructor<?> constructor,
int parameterIndex)
Create a new MethodParameter for the given constructor, with nesting level 1. |
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MethodParameter(java.lang.reflect.Constructor<?> constructor,
int parameterIndex,
int nestingLevel)
Create a new MethodParameter for the given constructor. |
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MethodParameter(java.lang.reflect.Method method,
int parameterIndex)
Create a new MethodParameter for the given method, with nesting level 1. |
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MethodParameter(java.lang.reflect.Method method,
int parameterIndex,
int nestingLevel)
Create a new MethodParameter for the given method. |
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MethodParameter(MethodParameter original)
Copy constructor, resulting in an independent MethodParameter object based on the same metadata and cache state that the original object was in. |
Method Summary | ||
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void |
decreaseNestingLevel()
Decrease this parameter's nesting level. |
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boolean |
equals(java.lang.Object obj)
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static MethodParameter |
forMethodOrConstructor(java.lang.Object methodOrConstructor,
int parameterIndex)
Create a new MethodParameter for the given method or constructor. |
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java.lang.reflect.Constructor<?> |
getConstructor()
Return the wrapped Constructor, if any. |
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java.lang.Class<?> |
getDeclaringClass()
Return the class that declares the underlying Method or Constructor. |
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java.lang.reflect.Type |
getGenericParameterType()
Return the generic type of the method/constructor parameter. |
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java.lang.reflect.Method |
getMethod()
Return the wrapped Method, if any. |
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getMethodAnnotation(java.lang.Class<T> annotationType)
Return the method/constructor annotation of the given type, if available. |
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java.lang.annotation.Annotation[] |
getMethodAnnotations()
Return the annotations associated with the target method/constructor itself. |
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int |
getNestingLevel()
Return the nesting level of the target type (typically 1; e.g. |
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getParameterAnnotation(java.lang.Class<T> annotationType)
Return the parameter annotation of the given type, if available. |
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java.lang.annotation.Annotation[] |
getParameterAnnotations()
Return the annotations associated with the specific method/constructor parameter. |
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int |
getParameterIndex()
Return the index of the method/constructor parameter. |
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java.lang.String |
getParameterName()
Return the name of the method/constructor parameter. |
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java.lang.Class<?> |
getParameterType()
Return the type of the method/constructor parameter. |
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java.lang.Integer |
getTypeIndexForCurrentLevel()
Return the type index for the current nesting level. |
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java.lang.Integer |
getTypeIndexForLevel(int nestingLevel)
Return the type index for the specified nesting level. |
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int |
hashCode()
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hasParameterAnnotation(java.lang.Class<T> annotationType)
Return true if the parameter has the given annotation type, and false if it doesn't. |
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boolean |
hasParameterAnnotations()
Return true if the parameter has at least one annotation, false if it has none. |
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void |
increaseNestingLevel()
Increase this parameter's nesting level. |
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void |
initParameterNameDiscovery(ParameterNameDiscoverer parameterNameDiscoverer)
Initialize parameter name discovery for this method parameter. |
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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, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public MethodParameter(java.lang.reflect.Method method, int parameterIndex)
method
- the Method to specify a parameter forparameterIndex
- the index of the parameterpublic MethodParameter(java.lang.reflect.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(java.lang.reflect.Constructor<?> constructor, int parameterIndex)
constructor
- the Constructor to specify a parameter forparameterIndex
- the index of the parameterpublic MethodParameter(java.lang.reflect.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)public MethodParameter(MethodParameter original)
original
- the original MethodParameter object to copy fromMethod Detail |
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public java.lang.reflect.Method getMethod()
Note: Either Method or Constructor is available.
null
if nonepublic java.lang.reflect.Constructor<?> getConstructor()
Note: Either Method or Constructor is available.
null
if nonepublic java.lang.Class<?> getDeclaringClass()
public int getParameterIndex()
public java.lang.Class<?> getParameterType()
null
)public java.lang.reflect.Type getGenericParameterType()
null
)public java.lang.annotation.Annotation[] getMethodAnnotations()
public <T extends java.lang.annotation.Annotation> T getMethodAnnotation(java.lang.Class<T> annotationType)
annotationType
- the annotation type to look for
null
if not foundpublic java.lang.annotation.Annotation[] getParameterAnnotations()
public <T extends java.lang.annotation.Annotation> T getParameterAnnotation(java.lang.Class<T> annotationType)
annotationType
- the annotation type to look for
null
if not foundpublic boolean hasParameterAnnotations()
public <T extends java.lang.annotation.Annotation> boolean hasParameterAnnotation(java.lang.Class<T> annotationType)
public void initParameterNameDiscovery(ParameterNameDiscoverer parameterNameDiscoverer)
This method does not actually try to retrieve the parameter name at
this point; it just allows discovery to happen when the application calls
getParameterName()
(if ever).
public java.lang.String getParameterName()
null
if no
parameter name metadata is contained in the class file or no
ParameterNameDiscoverer
has been set to begin with)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 java.lang.Integer getTypeIndexForCurrentLevel()
null
if none specified (indicating the default type index)getNestingLevel()
public java.lang.Integer getTypeIndexForLevel(int nestingLevel)
nestingLevel
- the nesting level to check
null
if none specified (indicating the default type index)public static MethodParameter forMethodOrConstructor(java.lang.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
public boolean equals(java.lang.Object obj)
equals
in class java.lang.Object
public int hashCode()
hashCode
in class java.lang.Object
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