org.apache.camel.util

Class ReflectionHelper

java.lang.Object

org.apache.camel.util.ReflectionHelper

public final class ReflectionHelper
extends Object

Helper for working with reflection on classes.

This code is based on org.apache.camel.spring.util.ReflectionUtils class.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ReflectionHelper.ClassCallback Action to take on each class.
static interface	ReflectionHelper.FieldCallback Callback interface invoked on each field in the hierarchy.
static interface	ReflectionHelper.MethodCallback Action to take on each method.

Method Summary

Modifier and Type	Method and Description
static void	doWithClasses(Class<?> clazz, ReflectionHelper.ClassCallback cc) Perform the given callback operation on the nested (inner) classes.
static void	doWithFields(Class<?> clazz, ReflectionHelper.FieldCallback fc) Invoke the given callback on all fields in the target class, going up the class hierarchy to get all declared fields.
static void	doWithMethods(Class<?> clazz, ReflectionHelper.MethodCallback mc) Perform the given callback operation on all matching methods of the given class and superclasses (or given interface and super-interfaces).
static Method	findMethod(Class<?> clazz, String name, Class<?>... paramTypes) Attempt to find a Method on the supplied class with the supplied name and parameter types.
static Object	getField(Field f, Object instance)
static void	setField(Field f, Object instance, Object value)

Methods inherited from class java.lang.Object

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

Method Detail

doWithClasses

public static void doWithClasses(Class<?> clazz,
                                 ReflectionHelper.ClassCallback cc)
                          throws IllegalArgumentException

Perform the given callback operation on the nested (inner) classes.

Parameters:

clazz - class to start looking at

cc - the callback to invoke for each inner class (excluding the class itself)

Throws:

IllegalArgumentException

doWithFields

public static void doWithFields(Class<?> clazz,
                                ReflectionHelper.FieldCallback fc)
                         throws IllegalArgumentException

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

Parameters:

clazz - the target class to analyze

fc - the callback to invoke for each field

Throws:

IllegalArgumentException

doWithMethods

public static void doWithMethods(Class<?> clazz,
                                 ReflectionHelper.MethodCallback mc)
                          throws IllegalArgumentException

Perform the given callback operation on all matching methods of the given class and superclasses (or given interface and super-interfaces).

Important: This method does not take the bridge methods into account.

Parameters:

clazz - class to start looking at

mc - the callback to invoke for each method

Throws:

IllegalArgumentException

findMethod

public static Method findMethod(Class<?> clazz,
                                String name,
                                Class<?>... paramTypes)

Attempt to find a Method on the supplied class with the supplied name and parameter types. Searches all superclasses up to Object.

Returns null if no Method can be found.

Parameters:

clazz - the class to introspect

name - the name of the method

paramTypes - the parameter types of the method (may be null to indicate any signature)

Returns:

the Method object, or null if none found

setField

public static void setField(Field f,
                            Object instance,
                            Object value)

getField

public static Object getField(Field f,
                              Object instance)