Example usage for java.lang.reflect InvocationHandler InvocationHandler

Introduction

In this page you can find the example usage for java.lang.reflect InvocationHandler InvocationHandler.

Prototype

InvocationHandler

Source Link

Usage

From source file:org.apache.brooklyn.rest.client.BrooklynApi.java

@SuppressWarnings("unchecked")
private <T> T proxy(Class<T> clazz) {
    final T result0 = ProxyFactory.create(clazz, target, clientExecutor);
    return (T) Proxy.newProxyInstance(clazz.getClassLoader(), new Class<?>[] { clazz },
            new InvocationHandler() {
                @Override/* www  .  j av  a 2 s.  c  o  m*/
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    try {
                        Object result1 = method.invoke(result0, args);
                        Class<?> type = String.class;
                        if (result1 instanceof Response) {
                            Response resp = (Response) result1;
                            if (isStatusCodeHealthy(resp.getStatus())
                                    && method.isAnnotationPresent(ApiOperation.class)) {
                                type = getClassFromMethodAnnotationOrDefault(method, type);
                            }
                            // wrap the original response so it self-closes
                            result1 = BuiltResponsePreservingError.copyResponseAndClose(resp, type);
                        }
                        return result1;
                    } catch (Throwable e) {
                        if (e instanceof InvocationTargetException) {
                            // throw the original exception
                            e = ((InvocationTargetException) e).getTargetException();
                        }
                        throw Exceptions.propagate(e);
                    }
                }

                private boolean isStatusCodeHealthy(int code) {
                    return (code >= 200 && code <= 299);
                }

                private Class<?> getClassFromMethodAnnotationOrDefault(Method method, Class<?> def) {
                    Class<?> type;
                    try {
                        type = method.getAnnotation(ApiOperation.class).response();
                    } catch (Exception e) {
                        type = def;
                        LOG.debug("Unable to get class from annotation: {}.  Defaulting to {}", e.getMessage(),
                                def.getName());
                        Exceptions.propagateIfFatal(e);
                    }
                    return type;
                }
            });
}

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From source file:com.easyjf.web.core.FrameworkEngine.java

/**
 * IWebAction?/*from www.  ja  v a2s .c om*/
 * @param methodName ??
 * @param bean ?Bean
 * @return
 */
public static IWebAction createProxyAction(final Module module, final Object bean) {
    String methodName = module.getMethod();
    int argNum = 0;
    Method method = null;
    try {
        method = bean.getClass().getMethod(methodName);
    } catch (NoSuchMethodException nme) {
        try {
            method = bean.getClass().getMethod(methodName, WebForm.class);
            argNum = 1;
        } catch (NoSuchMethodException e) {
            try {
                method = bean.getClass().getMethod(methodName, WebForm.class, Module.class);
                argNum = 2;
            } catch (NoSuchMethodException e2) {
                e.printStackTrace();
            }
        }
    }
    final Method beanMethod = method;
    final int num = argNum;
    if (method != null) {
        return (IWebAction) Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),
                new Class[] { IWebAction.class }, new InvocationHandler() {
                    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                        if (method.getName().equals("execute")) {
                            Object[] arg;
                            if (num == 0)
                                arg = new Object[] {};
                            else if (num == 1)
                                arg = new Object[] { args[0] };
                            else
                                arg = args;
                            Object result = beanMethod.invoke(bean, arg);
                            if (result != null) {
                                if (result instanceof Page)
                                    return result;
                                else
                                    return module.findPage(result.toString());
                            }
                            return null;
                        }
                        return method.invoke(bean, args);
                    }
                });
    }
    return null;
}

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From source file:org.eclipse.wb.internal.rcp.model.rcp.ActionBarAdvisorInfo.java

/**
 * Prepares {@link IActionBarConfigurer} implementation in {@link #m_IActionBarConfigurer}.
 *//* www.  java  2  s. com*/
private void prepare_IActionBarConfigurer() throws ClassNotFoundException {
    ClassLoader editorLoader = JavaInfoUtils.getClassLoader(this);
    Class<?> class_IActionBarConfigurer = editorLoader
            .loadClass("org.eclipse.ui.application.IActionBarConfigurer");
    Class<?> class_IWorkbenchWindowConfigurer = editorLoader
            .loadClass("org.eclipse.ui.application.IWorkbenchWindowConfigurer");
    m_IActionBarConfigurer = Proxy.newProxyInstance(editorLoader, new Class<?>[] { class_IActionBarConfigurer },
            new InvocationHandler() {
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    String methodSignature = ReflectionUtils.getMethodSignature(method);
                    if (methodSignature.equals("getWindowConfigurer()")) {
                        return m_IWorkbenchWindowConfigurer;
                    }
                    if (methodSignature.equals("getCoolBarManager()")) {
                        return m_coolBarManager;
                    }
                    if (methodSignature.equals("getMenuManager()")) {
                        return m_menuManager;
                    }
                    throw new NotImplementedException(methodSignature);
                }
            });
    m_IWorkbenchWindowConfigurer = Proxy.newProxyInstance(editorLoader,
            new Class<?>[] { class_IWorkbenchWindowConfigurer }, new InvocationHandler() {
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    String methodSignature = ReflectionUtils.getMethodSignature(method);
                    if (methodSignature.equals("getWindow()")) {
                        return m_IWorkbenchWindow;
                    }
                    throw new NotImplementedException(methodSignature);
                }
            });
    m_IWorkbenchWindow = DesignerPlugin.getActiveWorkbenchWindow();
}

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From source file:com.streamsets.pipeline.stage.processor.fieldhasher.TestFieldHasherProcessor.java

private Set<String> registerCallbackForValidFields() {
    final Set<String> validFieldsFromTheProcessor = new HashSet<String>();
    PowerMockito.replace(MemberMatcher.method(FieldHasherProcessor.class, "validateAndExtractFieldsToHash"))
            .with(new InvocationHandler() {
                @Override//from  ww w. ja  v  a  2s. c o m
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    Object returnVal = method.invoke(proxy, args);
                    validFieldsFromTheProcessor.addAll((HashSet<String>) returnVal);
                    return returnVal;
                }
            });
    return validFieldsFromTheProcessor;
}

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From source file:org.kchine.r.server.http.RHttpProxy.java

public static Object getDynamicProxy(final String url, final String sessionId, final String servantName,
        Class<?>[] c, final HttpClient httpClient) {
    Object proxy = Proxy.newProxyInstance(RHttpProxy.class.getClassLoader(), c, new InvocationHandler() {
        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
            return RHttpProxy.invoke(url, sessionId, servantName, method.getName(), method.getParameterTypes(),
                    args, httpClient);/* w  w w .j a  v a 2  s  .  co m*/
        }
    });
    return proxy;
}

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From source file:com.zavakid.mushroom.impl.MetricsSystemImpl.java

@Override
public synchronized void register(final Callback callback) {
    callbacks.add((Callback) Proxy.newProxyInstance(callback.getClass().getClassLoader(),
            new Class<?>[] { Callback.class }, new InvocationHandler() {

                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    try {
                        return method.invoke(callback, args);
                    } catch (Exception e) {
                        LOG.warn("Caught exception in callback " + method.getName(), e);
                    }//  w  w  w . jav  a2s  . c  o  m
                    return null;
                }
            }));
}

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From source file:org.nebularis.defproxy.AnnotationDrivenProxyFactoryTestCase.java

private <T> T wrap(final Object delegateObject, final Class<T> clazz) {
    InvocationHandler handler = new InvocationHandler() {
        private final Object delegate = delegateObject;

        @Override/*  w  w  w.j  a v  a 2  s .  c  om*/
        public Object invoke(Object o, Method method, Object[] objects) throws Throwable {
            // handlerConfiguration.getMethodInvoker(method).handleInvocation(delegate, objects);
            return ((MyDelegate) delegate).getName();
        }
    };
    final Class proxyClass = Proxy.getProxyClass(clazz.getClassLoader(), new Class[] { clazz });
    final Object obj = createProxyInstance(handler, proxyClass);
    final T casted = (T) obj;
    return casted;
}

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From source file:me.piebridge.android.preference.PreferenceFragment.java

@Override
public void onStart() {
    super.onStart();
    // FIXME: mPreferenceManager.setOnPreferenceTreeClickListener(this);
    try {/*from   ww w.  jav  a  2 s .co  m*/
        Class<?> clazz = Class.forName("android.preference.PreferenceManager$OnPreferenceTreeClickListener");
        Object proxy = Proxy.newProxyInstance(clazz.getClassLoader(), new Class[] { clazz },
                new InvocationHandler() {
                    @Override
                    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                        if (method.getName().equals("onPreferenceTreeClick")) {
                            return onPreferenceTreeClick((PreferenceScreen) args[0], (Preference) args[1]);
                        }
                        return null;
                    }
                });
        callVoidMethod(mPreferenceManager, "setOnPreferenceTreeClickListener", new Class[] { clazz },
                new Object[] { proxy });
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
}

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From source file:com.cloud.bridge.service.controller.s3.ServiceProvider.java

@SuppressWarnings("unchecked")
private static <T> T getProxy(Class<?> serviceInterface, final T serviceObject) {
    return (T) Proxy.newProxyInstance(serviceObject.getClass().getClassLoader(),
            new Class[] { serviceInterface }, new InvocationHandler() {
                @Override//  w  w  w  . j a va 2  s  .  c o m
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    Object result = null;
                    try {
                        result = method.invoke(serviceObject, args);
                    } catch (Throwable e) {
                        // Rethrow the exception to Axis:
                        // Check if the exception is an AxisFault or a
                        // RuntimeException
                        // enveloped AxisFault and if so, pass it on as
                        // such. Otherwise
                        // log to help debugging and throw as is.
                        if (e.getCause() != null && e.getCause() instanceof AxisFault)
                            throw e.getCause();
                        else if (e.getCause() != null && e.getCause().getCause() != null
                                && e.getCause().getCause() instanceof AxisFault)
                            throw e.getCause().getCause();
                        else {
                            logger.warn("Unhandled exception " + e.getMessage(), e);
                            throw e;
                        }
                    } finally {
                    }
                    return result;
                }
            });
}

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From source file:org.apache.nifi.controller.service.StandardControllerServiceProvider.java

private ControllerServiceNode createGhostControllerService(final String type, final String id) {
    final InvocationHandler invocationHandler = new InvocationHandler() {
        @Override/*from   w  ww .j  a va  2  s . com*/
        public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
            final String methodName = method.getName();

            if ("validate".equals(methodName)) {
                final ValidationResult result = new ValidationResult.Builder().input("Any Property")
                        .subject("Missing Controller Service").valid(false)
                        .explanation(
                                "Controller Service could not be created because the Controller Service Type ("
                                        + type + ") could not be found")
                        .build();
                return Collections.singleton(result);
            } else if ("getPropertyDescriptor".equals(methodName)) {
                final String propertyName = (String) args[0];
                return new PropertyDescriptor.Builder().name(propertyName).description(propertyName)
                        .sensitive(true).required(true).build();
            } else if ("getPropertyDescriptors".equals(methodName)) {
                return Collections.emptyList();
            } else if ("onPropertyModified".equals(methodName)) {
                return null;
            } else if ("getIdentifier".equals(methodName)) {
                return id;
            } else if ("toString".equals(methodName)) {
                return "GhostControllerService[id=" + id + ", type=" + type + "]";
            } else if ("hashCode".equals(methodName)) {
                return 91 * type.hashCode() + 41 * id.hashCode();
            } else if ("equals".equals(methodName)) {
                return proxy == args[0];
            } else {
                throw new IllegalStateException(
                        "Controller Service could not be created because the Controller Service Type (" + type
                                + ") could not be found");
            }
        }
    };

    final ControllerService proxiedService = (ControllerService) Proxy.newProxyInstance(
            getClass().getClassLoader(), new Class[] { ControllerService.class }, invocationHandler);

    final String simpleClassName = type.contains(".") ? StringUtils.substringAfterLast(type, ".") : type;
    final String componentType = "(Missing) " + simpleClassName;

    final ComponentLog logger = new SimpleProcessLogger(id, proxiedService);

    final ControllerServiceNode serviceNode = new StandardControllerServiceNode(proxiedService, proxiedService,
            id, new StandardValidationContextFactory(this, variableRegistry), this, componentType, type,
            variableRegistry, logger);
    return serviceNode;
}

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