Examples of org.springframework.beans.factory.FactoryBean

Package org.springframework.beans.factory

Examples of org.springframework.beans.factory.FactoryBean

org.springframework.beans.factory.FactoryBean
Interface to be implemented by objects used within a {@link BeanFactory}which are themselves factories. If a bean implements this interface, it is used as a factory for an object to expose, not directly as a bean instance that will be exposed itself.
NB: A bean that implements this interface cannot be used as a normal bean. A FactoryBean is defined in a bean style, but the object exposed for bean references ( {@link #getObject()} is alwaysthe object that it creates.
FactoryBeans can support singletons and prototypes, and can either create objects lazily on demand or eagerly on startup. The {@link SmartFactoryBean} interface allows for exposingmore fine-grained behavioral metadata.
This interface is heavily used within the framework itself, for example for the AOP {@link org.springframework.aop.framework.ProxyFactoryBean}or the {@link org.springframework.jndi.JndiObjectFactoryBean}. It can be used for application components as well; however, this is not common outside of infrastructure code.
NOTE: FactoryBean objects participate in the containing BeanFactory's synchronization of bean creation. There is usually no need for internal synchronization other than for purposes of lazy initialization within the FactoryBean itself (or the like). @author Rod Johnson @author Juergen Hoeller @since 08.03.2003 @see org.springframework.beans.factory.BeanFactory @see org.springframework.aop.framework.ProxyFactoryBean @see org.springframework.jndi.JndiObjectFactoryBean

    }
    else {
      // Singleton or scoped - not a prototype.
      // However, FactoryBean may still produce a prototype object...
      if (!BeanFactoryUtils.isFactoryDereference(name) && isBeanClassMatch(beanName, bd, FactoryBean.class)) {
        FactoryBean factoryBean = (FactoryBean) getBean(FACTORY_BEAN_PREFIX + beanName);
        return ((factoryBean instanceof SmartFactoryBean && ((SmartFactoryBean) factoryBean).isPrototype()) ||
            !factoryBean.isSingleton());
      }
      else {
        return false;
      }
    }

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  protected Class getTypeForFactoryBean(String beanName, RootBeanDefinition mbd) {
    if (!mbd.isSingleton()) {
      return null;
    }
    try {
      FactoryBean factoryBean = (FactoryBean) getBean(FACTORY_BEAN_PREFIX + beanName);
      return getTypeForFactoryBean(factoryBean);
    }
    catch (BeanCreationException ex) {
      // Can only happen when getting a FactoryBean.
      if (ex.contains(BeanCurrentlyInCreationException.class)) {

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    // If it's a FactoryBean, we use it to create a bean instance, unless the
    // caller actually wants a reference to the factory.
    if (beanInstance instanceof FactoryBean) {
      if (!BeanFactoryUtils.isFactoryDereference(name)) {
        // Return bean instance from factory.
        FactoryBean factory = (FactoryBean) beanInstance;
        String beanName = transformedBeanName(name);
        // Cache object obtained from FactoryBean if it is a singleton.
        if (shared && factory.isSingleton()) {
          synchronized (getSingletonMutex()) {
            object = this.factoryBeanObjectCache.get(beanName);
            if (object == null) {
              object = getObjectFromFactoryBean(factory, beanName, mbd);
              this.factoryBeanObjectCache.put(beanName, object);

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      // Is bean a FactoryBean?
      if (beanInstance instanceof FactoryBean && !isFactoryType) {
        if (includeFactoryBeans) {
          // Match object created by FactoryBean.
          FactoryBean factory = (FactoryBean) beanInstance;
          Class objectType = factory.getObjectType();
          if ((includePrototypes || factory.isSingleton()) &&
              objectType != null && type.isAssignableFrom(objectType)) {
            matches.put(beanName, getBean(beanName));
          }
        }
      }

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  public void testMatchingFactoryBeanObject() {
    assertTrue("Matching bean must be advised (proxied)", this.testFactoryBean1 instanceof Advised);
    assertEquals("myValue", this.testFactoryBean1.get("myKey"));
    assertEquals("myValue", this.testFactoryBean1.get("myKey"));
    assertEquals("Advice not executed: must have been", 2, this.counterAspect.getCount());
    FactoryBean fb = (FactoryBean) getApplicationContext().getBean("&testFactoryBean1");
    assertTrue("FactoryBean itself must *not* be advised", !(fb instanceof Advised));
  }

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    assertTrue("FactoryBean itself must *not* be advised", !(fb instanceof Advised));
  }


  public void testMatchingFactoryBeanItself() {
    assertTrue("Matching bean must *not* be advised (proxied)", !(this.testFactoryBean2 instanceof Advised));
    FactoryBean fb = (FactoryBean) getApplicationContext().getBean("&testFactoryBean2");
    assertTrue("FactoryBean itself must be advised", fb instanceof Advised);
    assertTrue(Map.class.isAssignableFrom(fb.getObjectType()));
    assertTrue(Map.class.isAssignableFrom(fb.getObjectType()));
    assertEquals("Advice not executed: must have been", 2, this.counterAspect.getCount());
  }

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    TestInterceptor ti = (TestInterceptor) sac.getBean("testInterceptor");
    assertEquals(0, ti.nrOfInvocations);
    singletonToBeProxied.getName();
    assertEquals(1, ti.nrOfInvocations);


    FactoryBean factory = (FactoryBean) sac.getBean("&singletonFactoryToBeProxied");
    assertTrue(Proxy.isProxyClass(factory.getClass()));
    TestBean tb = (TestBean) sac.getBean("singletonFactoryToBeProxied");
    assertFalse(AopUtils.isAopProxy(tb));
    assertEquals(3, ti.nrOfInvocations);
    tb.getAge();
    assertEquals(3, ti.nrOfInvocations);

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    sac.refresh();


    TestAutoProxyCreator tapc = (TestAutoProxyCreator) sac.getBean("testAutoProxyCreator");
    tapc.testInterceptor.nrOfInvocations = 0;


    FactoryBean factory = (FactoryBean) sac.getBean("&singletonFactoryToBeProxied");
    assertTrue(AopUtils.isCglibProxy(factory));


    TestBean tb = (TestBean) sac.getBean("singletonFactoryToBeProxied");
    assertTrue(AopUtils.isCglibProxy(tb));
    assertEquals(2, tapc.testInterceptor.nrOfInvocations);

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    sac.refresh();


    TestAutoProxyCreator tapc = (TestAutoProxyCreator) sac.getBean("testAutoProxyCreator");
    tapc.testInterceptor.nrOfInvocations = 0;


    FactoryBean prototypeFactory = (FactoryBean) sac.getBean("&prototypeFactoryToBeProxied");
    assertTrue(AopUtils.isCglibProxy(prototypeFactory));
    TestBean tb = (TestBean) sac.getBean("prototypeFactoryToBeProxied");
    assertTrue(AopUtils.isCglibProxy(tb));


    assertEquals(2, tapc.testInterceptor.nrOfInvocations);

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    sac.refresh();


    TestAutoProxyCreator tapc = (TestAutoProxyCreator) sac.getBean("testAutoProxyCreator");
    tapc.testInterceptor.nrOfInvocations = 0;


    FactoryBean factory = (FactoryBean) sac.getBean("&singletonFactoryToBeProxied");
    assertFalse(AopUtils.isAopProxy(factory));


    TestBean tb = (TestBean) sac.getBean("singletonFactoryToBeProxied");
    assertTrue(AopUtils.isCglibProxy(tb));
    assertEquals(0, tapc.testInterceptor.nrOfInvocations);

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