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

    greeter.greet();
    final Factory factory = (Factory)yan.getInstance("myfactory");
    factory.create();
    final Factory factory2 = (Factory)yan.getInstance("myfactory2");
    factory2.create();
    final FactoryBean fb = SpringAdapter.getFactoryBean(yan, "myController");
    assertNotNull(fb);
  }

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      public void run() throws Exception {
        foo.noop();
      }
    };
    bench.start(true);
    FactoryBean fb = SpringAdapter.getFactoryBean(yan, "fooProxy");
    assertNotNull(fb);
  }

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      final Component fbc = SpringAdapter.getFactoryBeanComponent(c);
      if(fbc!=null){
        //I am Factory Bean
        if(includeFactoryBeans){
          //attempt to match the FactoryBean result.
          final FactoryBean fb = (FactoryBean)instantiate(fbc);
          if(!includePrototypes && !fb.isSingleton()){
            continue;
          }
          final Class fbt = fb.getObjectType();
          if(type==null || ReflectionUtil.isAssignableFrom(type, fbt)){
            final String beanname = (String)key;
            listener.onFactoryBean(beanname, fb);
            continue;
          }

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      final Component fbc = SpringAdapter.getFactoryBeanComponent(c);
      if(requiredType==null){
        return instantiate(c);
      }
      if(fbc!=null){
        final FactoryBean fb = (FactoryBean)instantiate(fbc);
        final Class ctype = fb.getObjectType();
        checkBeanType(beanname, requiredType, ctype);
        return instantiate(beanname, fb);
      }
      else{
        final Class ctype = c.getType();

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  throws NoSuchBeanDefinitionException {
    final Component c = getComponent(name);
    if(!BeanFactoryUtils.isFactoryDereference(name)){
      final Component fbc = SpringAdapter.getFactoryBeanComponent(c);
      if(fbc!=null){
        final FactoryBean fb = (FactoryBean)instantiate(fbc);
        return fb.isSingleton();
      }
    }
    return c.isSingleton();
  }

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  throws NoSuchBeanDefinitionException {
    final Component c = getComponent(name);
    if(!BeanFactoryUtils.isFactoryDereference(name)){
      final Component fbc = SpringAdapter.getFactoryBeanComponent(c);
      if(fbc!=null){
        final FactoryBean fb = (FactoryBean)instantiate(fbc);
        return fb.getObjectType();
      }
    }
    return c.getType();
  }

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        Class beanClass = predictBeanType(beanName, mbd, true);
        if (beanClass != null && FactoryBean.class.isAssignableFrom(beanClass)) {
          if (BeanFactoryUtils.isFactoryDereference(name)) {
            return true;
          }
          FactoryBean factoryBean = (FactoryBean) getBean(FACTORY_BEAN_PREFIX + beanName);
          return factoryBean.isSingleton();
        }
        else {
          return !BeanFactoryUtils.isFactoryDereference(name);
        }
      }

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      if (BeanFactoryUtils.isFactoryDereference(name)) {
        return false;
      }
      Class beanClass = predictBeanType(beanName, mbd, true);
      if (beanClass != null && FactoryBean.class.isAssignableFrom(beanClass)) {
        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.
      logger.debug("Ignoring bean creation exception on FactoryBean type check", ex);

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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;
        // Cache object obtained from FactoryBean if it is a singleton.
        RootBeanDefinition mbd =
            (containsBeanDefinition(beanName) ? getMergedLocalBeanDefinition(beanName) :  null);
        boolean shared = (mbd == null || mbd.isSingleton());
        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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