ReflectionUtils (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

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org.springframework.util
Class ReflectionUtils

java.lang.Object
  org.springframework.util.ReflectionUtils

public abstract class ReflectionUtils
extends Object
extends Object

Simple utility class for handling reflection exceptions. Only intended for internal use.

Since:: 1.2.2
Author:: Juergen Hoeller, Rob Harrop, Rod Johnson, Costin Leau

Nested Class Summary

static interface ReflectionUtils.FieldCallback
          Callback interface invoked on each field in the hierarchy.

static interface ReflectionUtils.FieldFilter
          Callback optionally used to filter fields to be operated on by a field callback.

static interface ReflectionUtils.MethodCallback
          Action to take on each method.

static interface ReflectionUtils.MethodFilter
          Callback optionally used to method fields to be operated on by a method callback.

Field Summary

static ReflectionUtils.FieldFilter COPYABLE_FIELDS
          Pre-built FieldFilter that matches all non-static, non-final fields.

Constructor Summary

ReflectionUtils()


Method Summary

static void doWithFields(Class targetClass, ReflectionUtils.FieldCallback fc)
          Invoke the given callback on all private fields in the target class, going up the class hierarchy to get all declared fields.

static void doWithFields(Class targetClass, ReflectionUtils.FieldCallback fc, ReflectionUtils.FieldFilter ff)
          Invoke the given callback on all private fields in the target class, going up the class hierarchy to get all declared fields.

static void doWithMethods(Class targetClass, ReflectionUtils.MethodCallback mc)
          Perform the given callback operation on all matching methods of the given class and superclasses.

static void doWithMethods(Class targetClass, ReflectionUtils.MethodCallback mc, ReflectionUtils.MethodFilter mf)
          Perform the given callback operation on all matching methods of the given class and superclasses.

static Method findMethod(Class type, String name, Class[] paramTypes)
          Attempt to find a Method on the supplied type with the supplied name and parameter types.

static Method[] getAllDeclaredMethods(Class leafClass)
          Get all declared methods on the leaf class and all superclasses.

static void handleInvocationTargetException(InvocationTargetException ex)
          Handle the given invocation target exception.

static void handleReflectionException(Exception ex)
          Handle the given reflection exception.

static Object invokeMethod(Method method, Object target)
          Invoke the specified Method against the supplied target object with no arguments.

static Object invokeMethod(Method method, Object target, Object[] args)
          Invoke the specified Method against the supplied target object with the supplied arguments.

static boolean isPublicStaticFinal(Field field)
          Determine whether the given field is a "public static final" constant.

static void makeAccessible(Field field)
          Make the given field accessible, explicitly setting it accessible if necessary.

static void shallowCopyFieldState(Object src, Object dest)
          Given the source object and the destination, which must be the same class or a subclass, copy all fields, including inherited fields.

Methods inherited from class java.lang.Object

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

Nested Class Summary
`static interface`	`ReflectionUtils.FieldCallback` Callback interface invoked on each field in the hierarchy.
`static interface`	`ReflectionUtils.FieldFilter` Callback optionally used to filter fields to be operated on by a field callback.
`static interface`	`ReflectionUtils.MethodCallback` Action to take on each method.
`static interface`	`ReflectionUtils.MethodFilter` Callback optionally used to method fields to be operated on by a method callback.

Field Summary
`static ReflectionUtils.FieldFilter`	`COPYABLE_FIELDS` Pre-built FieldFilter that matches all non-static, non-final fields.

Constructor Summary
`ReflectionUtils()`

Method Summary
`static void`	`doWithFields(Class targetClass, ReflectionUtils.FieldCallback fc)` Invoke the given callback on all private fields in the target class, going up the class hierarchy to get all declared fields.
`static void`	`doWithFields(Class targetClass, ReflectionUtils.FieldCallback fc, ReflectionUtils.FieldFilter ff)` Invoke the given callback on all private fields in the target class, going up the class hierarchy to get all declared fields.
`static void`	`doWithMethods(Class targetClass, ReflectionUtils.MethodCallback mc)` Perform the given callback operation on all matching methods of the given class and superclasses.
`static void`	`doWithMethods(Class targetClass, ReflectionUtils.MethodCallback mc, ReflectionUtils.MethodFilter mf)` Perform the given callback operation on all matching methods of the given class and superclasses.
`static Method`	`findMethod(Class type, String name, Class[] paramTypes)` Attempt to find a `Method` on the supplied type with the supplied name and parameter types.
`static Method[]`	`getAllDeclaredMethods(Class leafClass)` Get all declared methods on the leaf class and all superclasses.
`static void`	`handleInvocationTargetException(InvocationTargetException ex)` Handle the given invocation target exception.
`static void`	`handleReflectionException(Exception ex)` Handle the given reflection exception.
`static Object`	`invokeMethod(Method method, Object target)` Invoke the specified `Method` against the supplied target object with no arguments.
`static Object`	`invokeMethod(Method method, Object target, Object[] args)` Invoke the specified `Method` against the supplied target object with the supplied arguments.
`static boolean`	`isPublicStaticFinal(Field field)` Determine whether the given field is a "public static final" constant.
`static void`	`makeAccessible(Field field)` Make the given field accessible, explicitly setting it accessible if necessary.
`static void`	`shallowCopyFieldState(Object src, Object dest)` Given the source object and the destination, which must be the same class or a subclass, copy all fields, including inherited fields.

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

Field Detail

COPYABLE_FIELDS

public static ReflectionUtils.FieldFilter COPYABLE_FIELDS

Pre-built FieldFilter that matches all non-static, non-final fields.

Constructor Detail

ReflectionUtils

public ReflectionUtils()

Method Detail

handleReflectionException

public static void handleReflectionException(Exception ex)

Handle the given reflection exception. Should only be called if no checked exception is expected to be thrown by the target method.

Throws the underlying RuntimeException or Error in case of an InvocationTargetException with such a root cause. Throws an IllegalStateException with an appropriate message else.

Parameters:: ex - the reflection exception to handle

handleInvocationTargetException

public static void handleInvocationTargetException(InvocationTargetException ex)

Handle the given invocation target exception. Should only be called if no checked exception is expected to be thrown by the target method.

Throws the underlying RuntimeException or Error in case of such a root cause. Throws an IllegalStateException else.

Parameters:: ex - the invocation target exception to handle

findMethod

public static Method findMethod(Class type,
                                String name,
                                Class[] paramTypes)

Attempt to find a Method on the supplied type with the supplied name and parameter types. Searches all superclasses up to Object. Returns null if no Method can be found.

invokeMethod

public static Object invokeMethod(Method method,
                                  Object target)

Invoke the specified Method against the supplied target object with no arguments. The target object can be null when invoking a static Method.

Thrown exceptions are handled via a call to handleReflectionException(java.lang.Exception).

See Also:: invokeMethod(java.lang.reflect.Method, Object, Object[])

invokeMethod

public static Object invokeMethod(Method method,
                                  Object target,
                                  Object[] args)

Invoke the specified Method against the supplied target object with the supplied arguments. The target object can be null when invoking a static Method.

Thrown exceptions are handled via a call to handleReflectionException(java.lang.Exception).

See Also:: invokeMethod(java.lang.reflect.Method, Object, Object[])

isPublicStaticFinal

public static boolean isPublicStaticFinal(Field field)

Determine whether the given field is a "public static final" constant.

Parameters:: field - the field to check

makeAccessible

public static void makeAccessible(Field field)

Make the given field accessible, explicitly setting it accessible if necessary. The setAccessible(true) method is only called when actually necessary, to avoid unnecessary conflicts with a JVM SecurityManager (if active).

Parameters:: field - the field to make accessible
See Also:: AccessibleObject.setAccessible(java.lang.reflect.AccessibleObject[], boolean)

doWithMethods

public static void doWithMethods(Class targetClass,
                                 ReflectionUtils.MethodCallback mc)
                          throws IllegalArgumentException

Perform the given callback operation on all matching methods of the given class and superclasses.

The same named method occurring on subclass and superclass will appear twice, unless excluded by a ReflectionUtils.MethodFilter.

Parameters:: targetClass - class to start looking at; mc - the callback to invoke for each method
Throws:: IllegalArgumentException
See Also:: doWithMethods(Class, MethodCallback, MethodFilter)

doWithMethods

public static void doWithMethods(Class targetClass,
                                 ReflectionUtils.MethodCallback mc,
                                 ReflectionUtils.MethodFilter mf)
                          throws IllegalArgumentException

Perform the given callback operation on all matching methods of the given class and superclasses.

The same named method occurring on subclass and superclass will appear twice, unless excluded by the specified ReflectionUtils.MethodFilter.

Parameters:: targetClass - class to start looking at; mc - the callback to invoke for each method; mf - the filter that determines the methods to apply the callback to
Throws:: IllegalArgumentException

getAllDeclaredMethods

public static Method[] getAllDeclaredMethods(Class leafClass)
                                      throws IllegalArgumentException

Get all declared methods on the leaf class and all superclasses. Leaf class methods are included first.

Throws:: IllegalArgumentException

doWithFields

public static void doWithFields(Class targetClass,
                                ReflectionUtils.FieldCallback fc)
                         throws IllegalArgumentException

Invoke the given callback on all private fields in the target class, going up the class hierarchy to get all declared fields.

Parameters:: targetClass - the target class to analyze; fc - the callback to invoke for each field
Throws:: IllegalArgumentException

doWithFields

public static void doWithFields(Class targetClass,
                                ReflectionUtils.FieldCallback fc,
                                ReflectionUtils.FieldFilter ff)
                         throws IllegalArgumentException

Invoke the given callback on all private fields in the target class, going up the class hierarchy to get all declared fields.

Parameters:: targetClass - the target class to analyze; fc - the callback to invoke for each field; ff - the filter that determines the fields to apply the callback to
Throws:: IllegalArgumentException

shallowCopyFieldState

public static void shallowCopyFieldState(Object src,
                                         Object dest)
                                  throws IllegalArgumentException

Given the source object and the destination, which must be the same class or a subclass, copy all fields, including inherited fields. Designed to work on objects with public no-arg constructors.

Throws:: IllegalArgumentException - if the arguments are incompatible

Overview

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The Spring Framework

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SUMMARY: NESTED | FIELD | CONSTR | METHOD

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ReflectionUtils (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

org.springframework.util Class ReflectionUtils

COPYABLE_FIELDS

ReflectionUtils

handleReflectionException

handleInvocationTargetException

findMethod

invokeMethod

invokeMethod

isPublicStaticFinal

makeAccessible

doWithMethods

doWithMethods

getAllDeclaredMethods

doWithFields

doWithFields

shallowCopyFieldState

org.springframework.util
Class ReflectionUtils