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java.lang.Objectorg.springframework.test.util.ReflectionTestUtils
public class ReflectionTestUtils
ReflectionTestUtils is a collection of reflection-based utility
methods for use in unit and integration testing scenarios.
There are often times when it would be beneficial to be able to set a
non-public field, invoke a non-public setter method, or
invoke a non-public configuration or lifecycle
callback method when testing code involving, for example:
private or protected field access as opposed to
public setter methods for properties in a domain entity.@Autowired and
@Resource which provides dependency
injection for private or protected fields, setter methods,
and configuration methods.@PostConstruct
and @PreDestroy for lifecycle callback
methods.
ReflectionUtils| Constructor Summary | |
|---|---|
ReflectionTestUtils()
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| Method Summary | ||
|---|---|---|
static Object |
getField(Object target,
String name)
Get the field with the given name from the provided target object. |
|
static Object |
invokeGetterMethod(Object target,
String name)
Invoke the getter method with the given name on the supplied
target object with the supplied value. |
|
static
|
invokeMethod(Object target,
String name,
Object... args)
Invoke the method with the given name on the supplied target
object with the supplied arguments. |
|
static void |
invokeSetterMethod(Object target,
String name,
Object value)
Invoke the setter method with the given name on the supplied
target object with the supplied value. |
|
static void |
invokeSetterMethod(Object target,
String name,
Object value,
Class<?> type)
Invoke the setter method with the given name on the supplied
target object with the supplied value. |
|
static void |
setField(Object target,
String name,
Object value)
Set the field with the given name on the provided
target object to the supplied value. |
|
static void |
setField(Object target,
String name,
Object value,
Class<?> type)
Set the field with the given name on the provided
target object to the supplied value. |
|
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public ReflectionTestUtils()
| Method Detail |
|---|
public static void setField(Object target,
String name,
Object value)
field with the given name on the provided
target object to the supplied value.
This method traverses the class hierarchy in search of the desired field.
In addition, an attempt will be made to make non-public fields
accessible, thus allowing one to set protected,
private, and package-private fields.
target - the target object on which to set the fieldname - the name of the field to setvalue - the value to setReflectionUtils.findField(Class, String, Class),
ReflectionUtils.makeAccessible(Field),
ReflectionUtils.setField(Field, Object, Object)
public static void setField(Object target,
String name,
Object value,
Class<?> type)
field with the given name on the provided
target object to the supplied value.
This method traverses the class hierarchy in search of the desired
field. In addition, an attempt will be made to make non-public
fields accessible, thus allowing one to set protected,
private, and package-private fields.
target - the target object on which to set the fieldname - the name of the field to setvalue - the value to settype - the type of the field (may be null)ReflectionUtils.findField(Class, String, Class),
ReflectionUtils.makeAccessible(Field),
ReflectionUtils.setField(Field, Object, Object)
public static Object getField(Object target,
String name)
name from the provided target object.
This method traverses the class hierarchy in search of the desired
field. In addition, an attempt will be made to make non-public
fields accessible, thus allowing one to get protected,
private, and package-private fields.
target - the target object on which to set the fieldname - the name of the field to get
ReflectionUtils.findField(Class, String, Class),
ReflectionUtils.makeAccessible(Field),
ReflectionUtils.setField(Field, Object, Object)
public static void invokeSetterMethod(Object target,
String name,
Object value)
name on the supplied
target object with the supplied value.
This method traverses the class hierarchy in search of the desired
method. In addition, an attempt will be made to make non-public
methods accessible, thus allowing one to invoke protected,
private, and package-private setter methods.
In addition, this method supports JavaBean-style property
names. For example, if you wish to set the name property on the
target object, you may pass either "name" or
"setName" as the method name.
target - the target object on which to invoke the specified setter
methodname - the name of the setter method to invoke or the corresponding
property namevalue - the value to provide to the setter methodReflectionUtils.findMethod(Class, String, Class[]),
ReflectionUtils.makeAccessible(Method),
ReflectionUtils.invokeMethod(Method, Object, Object[])
public static void invokeSetterMethod(Object target,
String name,
Object value,
Class<?> type)
name on the supplied
target object with the supplied value.
This method traverses the class hierarchy in search of the desired
method. In addition, an attempt will be made to make non-public
methods accessible, thus allowing one to invoke protected,
private, and package-private setter methods.
In addition, this method supports JavaBean-style property
names. For example, if you wish to set the name property on the
target object, you may pass either "name" or
"setName" as the method name.
target - the target object on which to invoke the specified setter
methodname - the name of the setter method to invoke or the corresponding
property namevalue - the value to provide to the setter methodtype - the formal parameter type declared by the setter methodReflectionUtils.findMethod(Class, String, Class[]),
ReflectionUtils.makeAccessible(Method),
ReflectionUtils.invokeMethod(Method, Object, Object[])
public static Object invokeGetterMethod(Object target,
String name)
name on the supplied
target object with the supplied value.
This method traverses the class hierarchy in search of the desired
method. In addition, an attempt will be made to make non-public
methods accessible, thus allowing one to invoke protected,
private, and package-private getter methods.
In addition, this method supports JavaBean-style property
names. For example, if you wish to get the name property on the
target object, you may pass either "name" or
"getName" as the method name.
target - the target object on which to invoke the specified getter
methodname - the name of the getter method to invoke or the corresponding
property name
ReflectionUtils.findMethod(Class, String, Class[]),
ReflectionUtils.makeAccessible(Method),
ReflectionUtils.invokeMethod(Method, Object, Object[])
public static <T> T invokeMethod(Object target,
String name,
Object... args)
name on the supplied target
object with the supplied arguments.
This method traverses the class hierarchy in search of the desired
method. In addition, an attempt will be made to make non-public
methods accessible, thus allowing one to invoke protected,
private, and package-private methods.
target - the target object on which to invoke the specified methodname - the name of the method to invokeargs - the arguments to provide to the method
MethodInvoker,
ReflectionUtils.makeAccessible(Method),
ReflectionUtils.invokeMethod(Method, Object, Object[]),
ReflectionUtils.handleReflectionException(Exception)
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