java.lang.Object
- org.springframework.test.util.ReflectionTestUtils

```
public abstract class ReflectionTestUtils
extends Object
```
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-publicconfiguration or lifecycle callback method when testing code involving, for example:
- ORM frameworks such as JPA and Hibernate which condone the usage of private or protected field access as opposed to public setter methods for properties in a domain entity.
- Spring's support for annotations such as @Autowired, @Inject, and @Resource which provides dependency injection for private or protected fields, setter methods, and configuration methods.
- Use of annotations such as @PostConstruct and @PreDestroy for lifecycle callback methods.
In addition, several methods in this class provide support for static fields and static methods — for example, setField(Class, String, Object), getField(Class, String), invokeMethod(Class, String, Object...), invokeMethod(Object, Class, String, Object...), etc.
Since:
2.5
Author:
Sam Brannen, Juergen Hoeller
See Also:
ReflectionUtils, AopTestUtils

Constructor Summary
Constructors
Constructor Description
ReflectionTestUtils()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Object`	`getField(Class<?> targetClass, String name)`	Get the value of the static field with the given `name` from the provided `targetClass`.
`static Object`	`getField(Object targetObject, Class<?> targetClass, String name)`	Get the value of the field with the given `name` from the provided `targetObject`/`targetClass`.
`static Object`	`getField(Object targetObject, String name)`	Get the value of the field with the given `name` from the provided `targetObject`.
`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 <T> T`	`invokeMethod(Class<?> targetClass, String name, Object... args)`	Invoke the static method with the given `name` on the supplied target class with the supplied arguments.
`static <T> T`	`invokeMethod(Object targetObject, Class<?> targetClass, String name, Object... args)`	Invoke the method with the given `name` on the provided `targetObject`/`targetClass` with the supplied arguments.
`static <T> T`	`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(Class<?> targetClass, String name, Object value)`	Set the static field with the given `name` on the provided `targetClass` to the supplied `value`.
`static void`	`setField(Class<?> targetClass, String name, Object value, Class<?> type)`	Set the static field with the given `name`/`type` on the provided `targetClass` to the supplied `value`.
`static void`	`setField(Object targetObject, Class<?> targetClass, String name, Object value, Class<?> type)`	Set the field with the given `name`/`type` on the provided `targetObject`/`targetClass` to the supplied `value`.
`static void`	`setField(Object targetObject, String name, Object value)`	Set the field with the given `name` on the provided `targetObject` to the supplied `value`.
`static void`	`setField(Object targetObject, String name, Object value, Class<?> type)`	Set the field with the given `name`/`type` on the provided `targetObject` to the supplied `value`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ReflectionTestUtils
```
public ReflectionTestUtils()
```
- Method Detail
  - setField
```
public static void setField(Object targetObject,
                            String name,
                            @Nullable
                            Object value)
```
    Set the field with the given name on the provided targetObject to the supplied value.
    This method delegates to setField(Object, String, Object, Class), supplying null for the type argument.
    Parameters:
    targetObject - the target object on which to set the field; never null
    name - the name of the field to set; never null
    value - the value to set
  - setField
```
public static void setField(Object targetObject,
                            @Nullable
                            String name,
                            @Nullable
                            Object value,
                            @Nullable
                            Class<?> type)
```
    Set the field with the given name/type on the provided targetObject to the supplied value.
    This method delegates to setField(Object, Class, String, Object, Class), supplying null for the targetClass argument.
    Parameters:
    targetObject - the target object on which to set the field; never null
    name - the name of the field to set; may be null if type is specified
    value - the value to set
    type - the type of the field to set; may be null if name is specified
  - setField
```
public static void setField(Class<?> targetClass,
                            String name,
                            @Nullable
                            Object value)
```
    Set the static field with the given name on the provided targetClass to the supplied value.
    This method delegates to setField(Object, Class, String, Object, Class), supplying null for the targetObject and type arguments.
    This method does not support setting static final fields.
    Parameters:
    targetClass - the target class on which to set the static field; never null
    name - the name of the field to set; never null
    value - the value to set
    Since:
    4.2
  - setField
```
public static void setField(Class<?> targetClass,
                            @Nullable
                            String name,
                            @Nullable
                            Object value,
                            @Nullable
                            Class<?> type)
```
    Set the static field with the given name/type on the provided targetClass to the supplied value.
    This method delegates to setField(Object, Class, String, Object, Class), supplying null for the targetObject argument.
    This method does not support setting static final fields.
    Parameters:
    targetClass - the target class on which to set the static field; never null
    name - the name of the field to set; may be null if type is specified
    value - the value to set
    type - the type of the field to set; may be null if name is specified
    Since:
    4.2
  - setField
```
public static void setField(@Nullable
                            Object targetObject,
                            @Nullable
                            Class<?> targetClass,
                            @Nullable
                            String name,
                            @Nullable
                            Object value,
                            @Nullable
                            Class<?> type)
```
    Set the field with the given name/type on the provided targetObject/targetClass to the supplied value.
    If the supplied targetObject is a proxy, it will be unwrapped allowing the field to be set on the ultimate target of the proxy.
    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.
    This method does not support setting static final fields.
    Parameters:
    targetObject - the target object on which to set the field; may be null if the field is static
    targetClass - the target class on which to set the field; may be null if the field is an instance field
    name - the name of the field to set; may be null if type is specified
    value - the value to set
    type - the type of the field to set; may be null if name is specified
    Since:
    4.2
    See Also:
    ReflectionUtils.findField(Class, String, Class), ReflectionUtils.makeAccessible(Field), ReflectionUtils.setField(Field, Object, Object), AopTestUtils.getUltimateTargetObject(Object)
  - getField
```
@Nullable
public static Object getField(Object targetObject,
                              String name)
```
    Get the value of the field with the given name from the provided targetObject.
    This method delegates to getField(Object, Class, String), supplying null for the targetClass argument.
    Parameters:
    targetObject - the target object from which to get the field; never null
    name - the name of the field to get; never null
    Returns:
    the field's current value
    See Also:
    getField(Class, String)
  - getField
```
@Nullable
public static Object getField(Class<?> targetClass,
                              String name)
```
    Get the value of the static field with the given name from the provided targetClass.
    This method delegates to getField(Object, Class, String), supplying null for the targetObject argument.
    Parameters:
    targetClass - the target class from which to get the static field; never null
    name - the name of the field to get; never null
    Returns:
    the field's current value
    Since:
    4.2
    See Also:
    getField(Object, String)
  - getField
```
@Nullable
public static Object getField(@Nullable
                              Object targetObject,
                              @Nullable
                              Class<?> targetClass,
                              String name)
```
    Get the value of the field with the given name from the provided targetObject/targetClass.
    If the supplied targetObject is a proxy, it will be unwrapped allowing the field to be retrieved from the ultimate target of the proxy.
    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.
    Parameters:
    targetObject - the target object from which to get the field; may be null if the field is static
    targetClass - the target class from which to get the field; may be null if the field is an instance field
    name - the name of the field to get; never null
    Returns:
    the field's current value
    Since:
    4.2
    See Also:
    getField(Object, String), getField(Class, String), ReflectionUtils.findField(Class, String, Class), ReflectionUtils.makeAccessible(Field), ReflectionUtils.getField(Field, Object), AopTestUtils.getUltimateTargetObject(Object)
  - invokeSetterMethod
```
public 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.
    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.
    Parameters:
    target - the target object on which to invoke the specified setter method
    name - the name of the setter method to invoke or the corresponding property name
    value - the value to provide to the setter method
    See Also:
    ReflectionUtils.findMethod(Class, String, Class[]), ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[])
  - invokeSetterMethod
```
public static void invokeSetterMethod(Object target,
                                      String name,
                                      @Nullable
                                      Object value,
                                      @Nullable
                                      Class<?> type)
```
    Invoke the setter method with the given 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.
    Parameters:
    target - the target object on which to invoke the specified setter method
    name - the name of the setter method to invoke or the corresponding property name
    value - the value to provide to the setter method
    type - the formal parameter type declared by the setter method
    See Also:
    ReflectionUtils.findMethod(Class, String, Class[]), ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[])
  - invokeGetterMethod
```
@Nullable
public static Object invokeGetterMethod(Object target,
                                        String name)
```
    Invoke the getter method with the given 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.
    Parameters:
    target - the target object on which to invoke the specified getter method
    name - the name of the getter method to invoke or the corresponding property name
    Returns:
    the value returned from the invocation
    See Also:
    ReflectionUtils.findMethod(Class, String, Class[]), ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[])
  - invokeMethod
```
@Nullable
public static <T> T invokeMethod(Object target,
                                 String name,
                                 Object... args)
```
    Invoke the method with the given name on the supplied target object with the supplied arguments.
    This method delegates to invokeMethod(Object, Class, String, Object...), supplying null for the targetClass argument.
    Parameters:
    target - the target object on which to invoke the specified method
    name - the name of the method to invoke
    args - the arguments to provide to the method
    Returns:
    the invocation result, if any
    See Also:
    invokeMethod(Class, String, Object...), invokeMethod(Object, Class, String, Object...), MethodInvoker, ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[]), ReflectionUtils.handleReflectionException(Exception)
  - invokeMethod
```
@Nullable
public static <T> T invokeMethod(Class<?> targetClass,
                                 String name,
                                 Object... args)
```
    Invoke the static method with the given name on the supplied target class with the supplied arguments.
    This method delegates to invokeMethod(Object, Class, String, Object...), supplying null for the targetObject argument.
    Parameters:
    targetClass - the target class on which to invoke the specified method
    name - the name of the method to invoke
    args - the arguments to provide to the method
    Returns:
    the invocation result, if any
    Since:
    5.2
    See Also:
    invokeMethod(Object, String, Object...), invokeMethod(Object, Class, String, Object...), MethodInvoker, ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[]), ReflectionUtils.handleReflectionException(Exception)
  - invokeMethod
```
@Nullable
public static <T> T invokeMethod(@Nullable
                                 Object targetObject,
                                 @Nullable
                                 Class<?> targetClass,
                                 String name,
                                 Object... args)
```
    Invoke the method with the given name on the provided targetObject/targetClass 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.
    Parameters:
    targetObject - the target object on which to invoke the method; may be null if the method is static
    targetClass - the target class on which to invoke the method; may be null if the method is an instance method
    name - the name of the method to invoke
    args - the arguments to provide to the method
    Returns:
    the invocation result, if any
    Since:
    5.2
    See Also:
    invokeMethod(Object, String, Object...), invokeMethod(Class, String, Object...), MethodInvoker, ReflectionUtils.makeAccessible(Method), ReflectionUtils.invokeMethod(Method, Object, Object[]), ReflectionUtils.handleReflectionException(Exception)

Class ReflectionTestUtils

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ReflectionTestUtils

Method Detail

setField

setField

setField

setField

setField

getField

getField

getField

invokeSetterMethod

invokeSetterMethod

invokeGetterMethod

invokeMethod

invokeMethod

invokeMethod