Package org.fest.reflect.method

Class Invoker<T>

java.lang.Object

org.fest.reflect.method.Invoker<T>

Type Parameters:

T - the return type of the method invocation.

public final class Invoker<T>
extends Object

Understands the use of reflection to access a method from an object.

   // Equivalent to call 'person.setName("Luke")'
   method("setName").withParameterTypes(String.class)
                    .in(person)
                    .invoke("Luke");

   // Equivalent to call 'person.concentrate()'
   method("concentrate").in(person).invoke();

   // Equivalent to call 'person.getName()'
   String name = method("getName").withReturnType(String.class)
                                  .in(person)
                                  .invoke();
 

Field Summary

Fields

Modifier and Type	Field	Description
private final Method	method
private final Object	target

Constructor Summary

Constructors

Modifier	Constructor	Description
private	Invoker(Object target, Method method)

Method Summary

Modifier and Type	Method	Description
private ReflectionError	cannotInvokeMethod(Throwable cause, Object... args)
private static <T> Invoker<T>	createInvoker(String methodName, Object target, Class<?>... parameterTypes)
Method	info()	Returns the "real" method managed by this class.
T	invoke(Object... args)	Invokes the method managed by this class using the given arguments.
private static Method	lookupInClassHierarchy(String methodName, Class<?> targetType, Class<?>[] parameterTypes)
private static Method	method(String methodName, Class<?> type, Class<?>[] parameterTypes)
(package private) static <T> Invoker<T>	newInvoker(String methodName, Object target, Class<?>... parameterTypes)
private static Class<?>	typeOf(Object target)

Methods inherited from class java.lang.Object

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

Field Details

target

private final Object target

method

private final Method method

Constructor Details

Invoker

private Invoker(Object target,
 Method method)

Method Details

newInvoker

static <T> Invoker<T> newInvoker(String methodName,
 Object target,
 Class<?>... parameterTypes)

createInvoker

private static <T> Invoker<T> createInvoker(String methodName,
 Object target,
 Class<?>... parameterTypes)

typeOf

private static Class<?> typeOf(Object target)

lookupInClassHierarchy

private static Method lookupInClassHierarchy(String methodName,
 Class<?> targetType,
 Class<?>[] parameterTypes)

method

private static Method method(String methodName,
 Class<?> type,
 Class<?>[] parameterTypes)

invoke

public T invoke(Object... args)

Invokes the method managed by this class using the given arguments.

Parameters:

args - the arguments to use to call the method managed by this class.

Returns:

the result of the method call.

Throws:

ReflectionError - if the method cannot be invoked.

cannotInvokeMethod

private ReflectionError cannotInvokeMethod(Throwable cause,
 Object... args)

info

public Method info()

Returns the "real" method managed by this class.

Returns:

the "real" method managed by this class.