Examples of org.aopalliance.intercept.MethodInterceptor

org.aopalliance.intercept.MethodInterceptor
Intercepts calls on an interface on its way to the target. These are nested "on top" of the target.
The user should implement the {@link #invoke(MethodInvocation)}method to modify the original behavior. E.g. the following class implements a tracing interceptor (traces all the calls on the intercepted method(s)):
```
 class TracingInterceptor implements MethodInterceptor { Object invoke(MethodInvocation i) throws Throwable { System.out.println("method "+i.getMethod()+" is called on "+ i.getThis()+" with args "+i.getArguments()); Object ret=i.proceed(); System.out.println("method "+i.getMethod()+" returns "+ret); return ret; } } 
```

                         TypeEncounter<T> encounter) {
        Class<? super T> klass = literal.getRawType();


        do {
            for (Method method : klass.getDeclaredMethods()) {
                final MethodInterceptor interceptor = TimedInterceptor.forMethod(metricRegistry,
                                                                                 klass, method);
                if (interceptor != null) {
                    encounter.bindInterceptor(Matchers.only(method), interceptor);
                }
            }

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    @Override
    public <T> void hear(TypeLiteral<T> literal,
                         TypeEncounter<T> encounter) {
        final Class<?> klass = literal.getRawType();
        for (Method method : klass.getDeclaredMethods()) {
            final MethodInterceptor interceptor = ExceptionMeteredInterceptor.forMethod(
                    metricRegistry,
                    klass,
                    method);


            if (interceptor != null) {

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                         TypeEncounter<T> encounter) {
        Class<? super T> klass = literal.getRawType();


        do {
            for (Method method : klass.getDeclaredMethods()) {
                final MethodInterceptor interceptor = MeteredInterceptor.forMethod(metricRegistry,
                                                                                   klass,
                                                                                   method);
                if (interceptor != null) {
                    encounter.bindInterceptor(Matchers.only(method), interceptor);
                }

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public class ValidationModule
    extends AbstractModule
{
  @Override
  protected void configure() {
    final MethodInterceptor interceptor = new ValidationInterceptor();
    bindInterceptor(Matchers.any(), Matchers.annotatedWith(Validate.class), interceptor);
    requestInjection(interceptor);
  }

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        bindExplicitly();
        bindActions();
        bindCrudActions();


        // Bind a dummy interceptor to specifically test AOP interaction with decorated pages.
        bindInterceptor(Matchers.annotatedWith(Decorated.class), Matchers.any(), new MethodInterceptor() {
          @Override
          public Object invoke(MethodInvocation methodInvocation) throws Throwable {
            return methodInvocation.proceed();
          }
        });

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    return org.springframework.retry.interceptor.Retryable.class.isAssignableFrom(intf);
  }


  @Override
  public Object invoke(MethodInvocation invocation) throws Throwable {
    MethodInterceptor delegate = getDelegate(invocation.getThis(), invocation.getMethod());
    if (delegate != null) {
      return delegate.invoke(invocation);
    }
    else {
      return invocation.proceed();
    }
  }

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            retryable = AnnotationUtils.findAnnotation(method.getDeclaringClass(), Retryable.class);
          }
          if (retryable == null) {
            return this.delegates.put(method, null);
          }
          MethodInterceptor delegate;
          if (StringUtils.hasText(retryable.interceptor())) {
            delegate = this.beanFactory.getBean(retryable.interceptor(), MethodInterceptor.class);
          }
          else if (retryable.stateful()) {
            delegate = getStatefulInterceptor(target, method, retryable);

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   * @see DATAREST-221
   */
  @Test
  public void wrapsDelegateResultInProxyIfTypesDontMatch() throws Throwable {


    MethodInterceptor methodInterceptor = new ProjectingMethodInterceptor(new ProxyProjectionFactory(null), interceptor);


    when(invocation.getMethod()).thenReturn(Helper.class.getMethod("getHelper"));
    when(interceptor.invoke(invocation)).thenReturn("Foo");


    assertThat(methodInterceptor.invoke(invocation), is(instanceOf(Helper.class)));
  }

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   * @see DATAREST-221
   */
  @Test
  public void retunsDelegateResultAsIsIfTypesMatch() throws Throwable {


    MethodInterceptor methodInterceptor = new ProjectingMethodInterceptor(factory, interceptor);


    when(invocation.getMethod()).thenReturn(Helper.class.getMethod("getString"));
    when(interceptor.invoke(invocation)).thenReturn("Foo");


    assertThat(methodInterceptor.invoke(invocation), is((Object) "Foo"));
  }

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   * @see DATAREST-221
   */
  @Test
  public void returnsNullAsIs() throws Throwable {


    MethodInterceptor methodInterceptor = new ProjectingMethodInterceptor(factory, interceptor);


    when(interceptor.invoke(invocation)).thenReturn(null);


    assertThat(methodInterceptor.invoke(invocation), is(nullValue()));
  }

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