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:ome.tools.hibernate.SessionStatus.java

public EmptySessionHolder() {
    super((Session) Proxy.newProxyInstance(Session.class.getClassLoader(), new Class[] { Session.class },
            new InvocationHandler() {
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    String name = method.getName();
                    if (name.equals("toString")) {
                        return "NULL SESSION PROXY";
                    }//  w  w  w  .  j a  va2 s . c o m

            else if (name.equals("hashCode")) {
                        return 0;
                    } else if (name.equals("equals")) {
                        return args[0] == null ? false : proxy == args[0];
                    } else {
                        throw new RuntimeException("No methods allowed");
                    }
                }
            }));
}

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From source file:be.idamediafoundry.sofa.livecycle.dsc.util.AnnotationDrivenQDoxComponentInfoExtractor.java

private <T extends java.lang.annotation.Annotation> T convertToJavaLang(final Annotation annotation,
        final Class<T> expectedType) {
    try {/*from ww  w.j  ava2s.  c o m*/
        final Class<?> annotationClass = Class.forName(annotation.getType().getFullyQualifiedName());
        @SuppressWarnings("unchecked")
        T proxy = (T) Proxy.newProxyInstance(this.getClass().getClassLoader(), new Class[] { annotationClass },
                new InvocationHandler() {

                    public Object invoke(Object instance, Method method, Object[] args) throws Throwable {
                        if (method.getName().equals("toString")) {
                            return "Proxied annotation of type " + annotationClass;
                        } else if (method.getName().equals("getClass")) {
                            return annotationClass;
                        }

                        Object value = annotation.getProperty(method.getName());
                        if (value == null) {
                            return method.getDefaultValue();
                        }
                        if (value instanceof Annotation) {
                            java.lang.annotation.Annotation sub = convertToJavaLang((Annotation) value,
                                    java.lang.annotation.Annotation.class);
                            return sub;
                        } else {
                            AnnotationConstant constant = (AnnotationConstant) value;
                            value = constant.getValue();
                            return value;
                        }
                    }
                });

        return proxy;

    } catch (ClassNotFoundException e) {
        throw new IllegalArgumentException(
                "The source code is annotated with a class that could not be found on your project's classpath, please fix this!",
                e);
    }
}

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From source file:com.mirth.connect.client.core.Client.java

@SuppressWarnings("unchecked")
public <T> T getServlet(final Class<T> servletInterface, final ExecuteType executeType) {
    return (T) Proxy.newProxyInstance(
            AccessController.doPrivileged(ReflectionHelper.getClassLoaderPA(servletInterface)),
            new Class[] { servletInterface }, new InvocationHandler() {
                @Override/*  www .j  ava2 s .c om*/
                public Object invoke(Object proxy, Method method, Object[] args) throws ClientException {
                    try {
                        WebTarget target = client.target(api);

                        Operation operation = OperationUtil.getOperation(servletInterface, method);
                        if (operation != null) {
                            target.property(ServerConnection.OPERATION_PROPERTY, operation);
                        }

                        if (executeType != null) {
                            target.property(ServerConnection.EXECUTE_TYPE_PROPERTY, executeType);
                        }

                        if (args == null && method.getName().equals("toString")) {
                            return target.toString();
                        }

                        T resource = WebResourceFactory.newResource(servletInterface, target);
                        Object result = method.invoke(resource, args);

                        // Make sure to return the right type
                        if (result == null && method.getReturnType().isPrimitive()) {
                            return method.getReturnType() == boolean.class ? false : (byte) 0x00;
                        }
                        return result;
                    } catch (Throwable t) {
                        Throwable cause = t;
                        if (cause instanceof InvocationTargetException && cause.getCause() != null) {
                            cause = cause.getCause();
                        }
                        if (cause instanceof ProcessingException && cause.getCause() != null) {
                            cause = cause.getCause();
                        }
                        if (cause instanceof ClientException) {
                            throw (ClientException) cause;
                        } else {
                            throw new ClientException(cause);
                        }
                    }
                }
            });
}

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From source file:org.talend.updates.runtime.model.P2ExtraFeature.java

@Override
public IStatus install(final IProgressMonitor progress, List<URI> allRepoUris) throws ExtraFeatureException {
    IStatus doInstallStatus = null;//from w  ww .j a v a 2s.c o  m
    File configIniBackupFile = null;
    Map<File, File> unzippedPatches = new HashMap<>();
    try {
        if (!isUseLegacyP2Install()) {
            // backup the config.ini
            configIniBackupFile = copyConfigFile(null);
        } // else legacy p2 install will update the config.ini
        doInstallStatus = installP2(progress, allRepoUris);
        if (doInstallStatus == null || !doInstallStatus.isOK()) {
            return doInstallStatus;
        }
        unzippedPatches = unzipPatches(progress, allRepoUris);
        storeInstalledFeatureMessage();
    } catch (IOException e) {
        throw new ExtraFeatureException(new ProvisionException(
                Messages.createErrorStatus(e, "ExtraFeaturesFactory.restore.config.error"))); //$NON-NLS-1$
    } finally {
        boolean isInstalled = false;
        if (doInstallStatus != null) {
            switch (doInstallStatus.getSeverity()) {
            case IStatus.OK:
            case IStatus.INFO:
            case IStatus.WARNING:
                isInstalled = true;
                break;
            default:
                isInstalled = false;
                break;
            }
        }
        IProgressMonitor monitor2 = progress;
        if (isInstalled) {
            if (progress != null) {
                monitor2 = (IProgressMonitor) Proxy.newProxyInstance(progress.getClass().getClassLoader(),
                        new Class[] { IProgressMonitor.class }, new InvocationHandler() {

                            @Override
                            public Object invoke(Object obj, Method method, Object[] args) throws Throwable {
                                if (method == null) {
                                    return null;
                                }
                                if (StringUtils.equals(method.getName(), "isCanceled")) { //$NON-NLS-1$
                                    return Boolean.FALSE;
                                }
                                return method.invoke(progress, args);
                            }
                        });
            }
            try {
                afterInstallP2(monitor2, unzippedPatches);
            } catch (Exception e) {
                ExceptionHandler.process(e);
            }
        }
        // restore the config.ini
        if (configIniBackupFile != null) { // must existed backup file.
            try {
                copyConfigFile(configIniBackupFile);
            } catch (IOException e) {
                throw new P2ExtraFeatureException(new ProvisionException(
                        Messages.createErrorStatus(e, "ExtraFeaturesFactory.back.config.error"))); //$NON-NLS-1$
            }
        }
        if (isInstalled) {
            try {
                afterRestoreConfigFile(monitor2, unzippedPatches);
            } catch (Exception e) {
                ExceptionHandler.process(e);
            }
        }
        if (unzippedPatches != null && !unzippedPatches.isEmpty()) {
            for (Map.Entry<File, File> patchEntry : unzippedPatches.entrySet()) {
                FilesUtils.deleteFolder(patchEntry.getValue(), true);
            }
        }
    }
    return doInstallStatus;
}

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From source file:mondrian.xmla.impl.Olap4jXmlaServlet.java

/**
 * Returns something that implements {@link OlapConnection} but still
 * behaves as the wrapper returned by the connection pool.
 *
 * <p>In other words we want the "close" method to play nice and do all the
 * pooling actions while we want all the olap methods to execute directly on
 * the un-wrapped OlapConnection object.
 *//*from w w w.j a  v a 2 s. c  o m*/
private static OlapConnection createDelegatingOlapConnection(final Connection connection,
        final OlapConnection olapConnection) {
    return (OlapConnection) Proxy.newProxyInstance(olapConnection.getClass().getClassLoader(),
            new Class[] { OlapConnection.class }, new InvocationHandler() {
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    if ("unwrap".equals(method.getName())
                            || OlapConnection.class.isAssignableFrom(method.getDeclaringClass())) {
                        return method.invoke(olapConnection, args);
                    } else {
                        return method.invoke(connection, args);
                    }
                }
            });
}

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From source file:org.hyperic.hq.product.jmx.MxUtil.java

public static JMXConnector getCachedMBeanConnector(Properties config)
        throws MalformedURLException, IOException {
    String jmxUrl = config.getProperty(MxUtil.PROP_JMX_URL);
    String user = config.getProperty(PROP_JMX_USERNAME);
    String pass = config.getProperty(PROP_JMX_PASSWORD);
    JMXConnectorKey key = new JMXConnectorKey(jmxUrl, user, pass);
    JMXConnector rtn = null;//  w ww  .  j ava  2  s  .  c o m
    synchronized (mbeanConns) {
        rtn = mbeanConns.get(key);
        if (rtn == null) {
            rtn = getMBeanConnector(config);
            mbeanConns.put(key, rtn);
        }
        try {
            // ensure that the connection is not broken
            rtn.getMBeanServerConnection();
        } catch (IOException e) {
            close(rtn);
            rtn = getMBeanConnector(config);
            mbeanConns.put(key, rtn);
        }
    }
    final JMXConnector c = rtn;
    final InvocationHandler handler = new InvocationHandler() {
        private final JMXConnector conn = c;

        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
            if (method.getName().equals("close")) {
                return null;
            }
            synchronized (conn) {
                return method.invoke(conn, args);
            }
        }
    };
    return (JMXConnector) Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),
            new Class<?>[] { JMXConnector.class }, handler);
}

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From source file:org.itest.impl.ITestRandomObjectGeneratorImpl.java

protected Object newDynamicProxy(Type type, final Map<String, Type> itestGenericMap,
        final ITestContext iTestContext) {
    final Class<?> clazz = ITestTypeUtil.getRawClass(type);
    final Map<String, Object> methodResults = new HashMap<String, Object>();

    Object res = Proxy.newProxyInstance(clazz.getClassLoader(), new Class<?>[] { clazz },
            new InvocationHandler() {

                @Override/* w  ww  .java  2 s .c  om*/
                public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                    String mSignature = ITestUtils.getMethodSingnature(method, true);
                    if (methodResults.containsKey(mSignature)) {
                        return methodResults.get(mSignature);
                    }
                    throw new ITestMethodExecutionException(
                            "Implementation of " + clazz.getName() + "." + mSignature + " not provided", null);
                }
            });

    Map<String, Type> map = ITestTypeUtil.getTypeMap(type, new HashMap<String, Type>());

    Class<?> t = clazz;
    do {
        for (Method m : t.getDeclaredMethods()) {
            if (!Modifier.isStatic(m.getModifiers())) {
                String signature = ITestUtils.getMethodSingnature(m, true);
                ITestParamState iTestState = iTestContext.getCurrentParam();
                ITestParamState mITestState = iTestState == null ? null : iTestState.getElement(signature);
                if (null == mITestState) {
                    mITestState = iTestState == null ? null
                            : iTestState.getElement(signature = ITestUtils.getMethodSingnature(m, false));
                }
                fillMethod(m, res, signature, map, iTestContext, methodResults);
            }
        }
        map = ITestTypeUtil.getTypeMap(clazz, map);
    } while ((t = t.getSuperclass()) != null);

    return res;
}

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From source file:org.soybeanMilk.test.unit.core.TestInvoke.java

@Test
public void execute_genericMethod_resolverIsProxy_resolveBase() throws Exception {
    SubSubSubGenericResolver resolver = (SubSubSubGenericResolver) Proxy.newProxyInstance(
            SubSubSubGenericResolver.class.getClassLoader(), new Class<?>[] { SubSubSubGenericResolver.class },
            new InvocationHandler() {
                private Object handler = new SubSubSubGenericResolverImpl();

                public Object invoke(Object arg0, Method arg1, Object[] arg2) throws Throwable {
                    return arg1.invoke(handler, arg2);
                }/*from  w  w  w.j  av  a 2  s. c  o  m*/
            });

    Arg[] args = new Arg[1];
    args[0] = new KeyArg("arg0");
    Invoke invoke = new Invoke(null, new ObjectResolver(resolver), "resolveBase", args, "result");

    Map<String, Object> src = new HashMap<String, Object>();
    src.put("id", 1);
    src.put("name", "generic");
    src.put("age", 5);

    ObjectSource os = new HashMapObjectSource(new DefaultGenericConverter());
    os.set("arg0", src);

    invoke.execute(os);

    JavaBeanSub re = os.get("result");

    Assert.assertEquals(1, re.getId().intValue());
    Assert.assertEquals("generic", re.getName());
    Assert.assertEquals(5, re.getAge().intValue());
}

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From source file:org.apache.htrace.core.Tracer.java

/**
 * Returns an object that will trace all calls to itself.
 *///from  w  ww  . j  av  a  2  s. c o  m
@SuppressWarnings("unchecked")
<T, V> T createProxy(final T instance) {
    InvocationHandler handler = new InvocationHandler() {
        @Override
        public Object invoke(Object obj, Method method, Object[] args) throws Throwable {
            try (TraceScope scope = Tracer.this.newScope(method.getName());) {
                return method.invoke(instance, args);
            } catch (Throwable ex) {
                ex.printStackTrace();
                throw ex;
            }
        }
    };
    return (T) Proxy.newProxyInstance(instance.getClass().getClassLoader(), instance.getClass().getInterfaces(),
            handler);
}

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From source file:org.soybeanMilk.test.unit.core.TestInvoke.java

@Test
public void execute_genericMethod_resolverIsProxy_resolveSub() throws Exception {
    SubSubSubGenericResolver resolver = (SubSubSubGenericResolver) Proxy.newProxyInstance(
            SubSubSubGenericResolver.class.getClassLoader(), new Class<?>[] { SubSubSubGenericResolver.class },
            new InvocationHandler() {
                private Object handler = new SubSubSubGenericResolverImpl();

                public Object invoke(Object arg0, Method arg1, Object[] arg2) throws Throwable {
                    return arg1.invoke(handler, arg2);
                }//from   w w w .j av  a  2 s . co  m
            });

    Arg[] args = new Arg[1];
    args[0] = new KeyArg("arg0");
    Invoke invoke = new Invoke(null, new ObjectResolver(resolver), "resolveSub", args, "result");

    Map<String, Object> src = new HashMap<String, Object>();
    src.put("id", 1);
    src.put("name", "generic");
    src.put("age", 5);

    ObjectSource os = new HashMapObjectSource(new DefaultGenericConverter());
    os.set("arg0", src);

    invoke.execute(os);

    JavaBeanSub re = os.get("result");

    Assert.assertEquals(1, re.getId().intValue());
    Assert.assertEquals("generic", re.getName());
    Assert.assertEquals(5, re.getAge().intValue());
}

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