| package org.apache.felix.dm; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.lang.reflect.Proxy; |
| |
| public class InvocationUtil { |
| public static Object invokeCallbackMethod(Object instance, String methodName, Class[][] signatures, Object[][] parameters) throws NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException { |
| Class currentClazz = instance.getClass(); |
| while (currentClazz != null) { |
| try { |
| return invokeMethod(instance, currentClazz, methodName, signatures, parameters, false); |
| } |
| catch (NoSuchMethodException nsme) { |
| // ignore |
| } |
| currentClazz = currentClazz.getSuperclass(); |
| } |
| throw new NoSuchMethodException(methodName); |
| } |
| |
| public static Object invokeMethod(Object object, Class clazz, String name, Class[][] signatures, Object[][] parameters, boolean isSuper) throws NoSuchMethodException, InvocationTargetException, IllegalArgumentException, IllegalAccessException { |
| if (object == null) { |
| throw new IllegalArgumentException("Instance cannot be null"); |
| } |
| if (clazz == null) { |
| throw new IllegalArgumentException("Class cannot be null"); |
| } |
| |
| // if we're talking to a proxy here, dig one level deeper to expose the |
| // underlying invocation handler (we do the same for injecting instances) |
| if (Proxy.isProxyClass(clazz)) { |
| object = Proxy.getInvocationHandler(object); |
| clazz = object.getClass(); |
| } |
| |
| Method m = null; |
| for (int i = 0; i < signatures.length; i++) { |
| Class[] signature = signatures[i]; |
| try { |
| m = clazz.getDeclaredMethod(name, signature); |
| if (!(isSuper && Modifier.isPrivate(m.getModifiers()))) { |
| m.setAccessible(true); |
| return m.invoke(object, parameters[i]); |
| } |
| } |
| catch (NoSuchMethodException e) { |
| // ignore this and keep looking |
| } |
| } |
| throw new NoSuchMethodException(name); |
| } |
| } |