Examples of com.google.inject.Provider

com.google.inject.Provider
Simply, any object capable of providing instances of type {@code T}. Providers are used in numerous ways by the Guice framework:
- When the default means for obtaining instances (an injectable or parameterless constructor) is insufficient for a particular binding, the module can specify a custom {@code Provider} instead, to control exactly howGuice creates or obtains instances for the binding.
- An implementation class may always choose to have a {@code Provider}instance injected, rather than having a {@code T} injected directly. Thismay give you access to multiple instances, instances you wish to safely mutate and discard, instances which are out of scope (e.g. using a {@code @RequestScoped} object from within a {@code @SessionScoped} object),or instances you don't want to initialize until they are absolutely needed.
- A custom {@link Scope} is implemented as a decorator of{@code Provider}, which decides when to delegate to the backing provider and when to provide the instance some other way.
- The {@link Injector} offers access to the {@code Provider} it usesto fulfill requests for a given key, via the {@link Injector#getProvider}methods.
@param < T> the type of object this provider provides @author crazybob@google.com (Bob Lee)

  @Test
  public void testExecuteDMLUpdates() throws Exception {
    Configuration configuration = createNiceMock(Configuration.class);
    DBAccessor dbAccessor = createNiceMock(DBAccessor.class);
    Injector injector = createStrictMock(Injector.class);
    Provider provider = createStrictMock(Provider.class);
    EntityManager em = createStrictMock(EntityManager.class);
    EntityTransaction et = createMock(EntityTransaction.class);
    TypedQuery query = createMock(TypedQuery.class);


    Method m = AbstractUpgradeCatalog.class.getDeclaredMethod
        ("updateConfigurationProperties", String.class, Map.class, boolean.class);


    UpgradeCatalog161 upgradeCatalog = createMockBuilder(UpgradeCatalog161.class)
      .addMockedMethod(m).createMock();


    expect(configuration.getDatabaseUrl()).andReturn(Configuration.JDBC_IN_MEMORY_URL).anyTimes();
    expect(injector.getProvider(EntityManager.class)).andReturn(provider).anyTimes();
    expect(provider.get()).andReturn(em).anyTimes();
    expect(em.getTransaction()).andReturn(et);
    expect(et.isActive()).andReturn(true);
    expect(em.createQuery("UPDATE ClusterEntity SET provisioningState = " +
      ":provisioningState", ClusterEntity.class)).andReturn(query);
    expect(query.setParameter("provisioningState", State.INSTALLED)).andReturn(null);

View Full Code Here

                    return value;
                }
            }
        }
        if (result instanceof Provider) {
            Provider provider = (Provider) result;
            result = provider.get();
        }
        if (result instanceof LinkRef) {
            LinkRef ref = (LinkRef) result;
            result = lookup(ref.getLinkName());
        }

View Full Code Here

            }
        } else {
            throw new UnsupportedOperationException("Annotated element " + member + " not supported");
        }


        return new Provider() {
            public Object get() {
                return getInjectionValue(type, uri, endpointRef, injectionPointName);
            }
        };
    }

View Full Code Here

            }
        } else {
            throw new UnsupportedOperationException("Annotated element " + member + " not supported");
        }


        return new Provider() {
            public Object get() {
                return getInjectionValue(type, uri, endpointRef, injectionPointName);
            }
        };
    }

View Full Code Here


    // Only need to bind the proxy once, for all locales.
    if (!i18nedSoFar.contains(iface)) {
      i18nedSoFar.add(iface);


      binder.bind((Class)iface).toProvider(new Provider() {


        // Wonderful Guice hack to get around not using assisted inject.
        @Inject
        private final Provider<HttpServletRequest> requestProvider = null;

View Full Code Here

            Provider<Session> sessionProvider = new Provider<Session>() {
                public Session get() {
                    return sessionFactory.openSession();
                }
            };
            Provider<SessionFactory> sessionFactoryProvider = new Provider() {
                public Object get() {
                    return sessionFactory;
                }
            };


            logger.info("adding binding for: " + sessionProvider.getClass());
            bindings.put(Session.class, sessionProvider);


            logger.info("adding binding for: " + sessionFactoryProvider.getClass());
            bindings.put(SessionFactory.class, sessionFactoryProvider);




            logger.info("adding resource provider for: " + sessionProvider.getClass());
            resourceProviders.put("SessionProvider", sessionProvider);

View Full Code Here

    Element element = elements.get(0);
    assertTrue(element + " instanceof ProviderInstanceBinding",
        element instanceof ProviderInstanceBinding);


    ProviderInstanceBinding binding = (ProviderInstanceBinding) element;
    Provider provider = binding.getProviderInstance();    
    assertEquals(ProviderMethod.class, provider.getClass());
    assertEquals(methodsObject, ((ProviderMethod) provider).getInstance());
  }

View Full Code Here

                @Override
                public Object visitScope(Scope scope) {
                    if (scope.equals(Scopes.SINGLETON)) {
                        Object target = injector.getInstance(binding.getKey());
                        if (binding instanceof ProviderInstanceBinding) {
                            Provider providerInstance = ((ProviderInstanceBinding) binding).getProviderInstance();
                            if (providerInstance instanceof ProviderMethod) {
                                // @Provides methods don't get picked up by TypeListeners, so we need to manually register them
                                if (lifecycleSupport.hasLifecycleMethod(target.getClass())) {
                                    lifecycleSupport.registerLifecycle(target);
                                }

View Full Code Here

        {
            final TypeLiteral<?> elementType = args[0];
            if ( BeanEntry.class == elementType.getRawType()
                || org.sonatype.inject.BeanEntry.class == elementType.getRawType() )
            {
                final Provider beanEntriesProvider = getBeanEntriesProvider( elementType );
                if ( null != beanEntriesProvider )
                {
                    binder.bind( key ).toProvider( beanEntriesProvider );
                }
            }

View Full Code Here

        {
            final Class qualifierType = args[0].getRawType();
            if ( qualifierType.isAnnotationPresent( Qualifier.class ) )
            {
                final Key beanKey = Key.get( args[1], qualifierType );
                final Provider beanEntries = beanProviders.beanEntriesOf( beanKey );
                return BeanEntry.class == entryType.getRawType() ? beanEntries
                                : org.eclipse.sisu.inject.Legacy.adapt( beanEntries );
            }
        }
        return null;

View Full Code Here

0 1 2 3

TOP

Related Classes of com.google.inject.Provider

com.google.inject.internal.InjectorImpl

com.google.inject.internal.InjectorImpl$ProviderBindingImpl

com.google.inject.internal.LookupProcessor

com.google.inject.spi.ProviderLookup

com.google.inject.spi.ProviderMethodsTest

com.google.inject.testing.fieldbinder.BoundFieldModuleTest

com.google.sitebricks.Localizer

com.netflix.governator.guice.LifecycleInjector

hudson.ExtensionFinder$GuiceFinder$SezpozModule

ninja.lifecycle.LifecycleServiceImpl

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.