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

    
    public StaticSpringServiceBeanReference(Object service) {
        super();
        Assert.notNull(service);
        if (service instanceof FactoryBean) {
            FactoryBean factoryBean = (FactoryBean)service;
            try {
                this.service = factoryBean.getObject();
            }
            catch (Exception e) {
                throw new ExecutionException("Error retrieving target object from factory bean " + factoryBean, e);
            }
        } else {

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    }


    public Object getTarget() throws Exception {
        Object bean = reference.getServiceBeanReference().getService();
        if (bean instanceof FactoryBean) {
            FactoryBean fb = (FactoryBean) bean;
            return fb.getObject();
        }
        return bean;
    }

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  public Object getTarget() throws Exception {
    ServiceRegistryReference service = serviceRegistry.getService(beanName);
    if (service != null) {
      Object bean = service.getBean();
      if (bean instanceof FactoryBean) {
        FactoryBean fb = (FactoryBean) bean;
        return fb.getObject();
      }
      return bean;
    }
    return null;
  }

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  public Object getTarget() throws Exception {
    ServiceRegistryReference reference = getServiceRegistryReference();
    if (reference != null) {
      Object bean = reference.getBean();
      if (bean instanceof FactoryBean) {
        FactoryBean fb = (FactoryBean) bean;
        return fb.getObject();
      }
      return bean;
    }
    return null;
  }

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  static Object getTarget(Object bean, String beanName) {
    
    Object target = null;
    if (bean instanceof FactoryBean) {
      FactoryBean factoryBean = (FactoryBean) bean;
      try {
        target = factoryBean.getObject();
      }
      catch (Exception e) {
        String errorMessage = "Failed getting object from factory bean " + factoryBean + ", bean name "
            + beanName;
        throw new BeanInstantiationException(factoryBean.getObjectType(), errorMessage, e);
      }
    }
    else {
      target = bean;
    }

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    synchronized (this.beanDefinitionMap) {
      for (String beanName : this.beanDefinitionNames) {
        RootBeanDefinition bd = getMergedLocalBeanDefinition(beanName);
        if (!bd.isAbstract() && bd.isSingleton() && !bd.isLazyInit()) {
          if (isFactoryBean(beanName)) {
            final FactoryBean factory = (FactoryBean) getBean(FACTORY_BEAN_PREFIX + beanName);
            boolean isEagerInit;
            if (System.getSecurityManager() != null && factory instanceof SmartFactoryBean) {
              isEagerInit = AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
                public Boolean run() {
                  return ((SmartFactoryBean) factory).isEagerInit();

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      if (mbd.isSingleton()) {
        if (isFactoryBean(beanName, mbd)) {
          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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      // However, FactoryBean may still produce a prototype object...
      if (BeanFactoryUtils.isFactoryDereference(name)) {
        return false;
      }
      if (isFactoryBean(beanName, mbd)) {
        final FactoryBean factoryBean = (FactoryBean) getBean(FACTORY_BEAN_PREFIX + beanName);
        if (System.getSecurityManager() != null) {
          return AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
            public Boolean run() {
              return ((factoryBean instanceof SmartFactoryBean && ((SmartFactoryBean) factoryBean).isPrototype()) ||
                  !factoryBean.isSingleton());
            }
          }, getAccessControlContext());
        }
        else {
          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 = doGetBean(FACTORY_BEAN_PREFIX + beanName, FactoryBean.class, null, true);
      return getTypeForFactoryBean(factoryBean);
    }
    catch (BeanCreationException ex) {
      // Can only happen when getting a FactoryBean.
      if (logger.isDebugEnabled()) {

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    if (mbd == null) {
      object = getCachedObjectForFactoryBean(beanName);
    }
    if (object == null) {
      // Return bean instance from factory.
      FactoryBean factory = (FactoryBean) beanInstance;
      // Caches object obtained from FactoryBean if it is a singleton.
      if (mbd == null && containsBeanDefinition(beanName)) {
        mbd = getMergedLocalBeanDefinition(beanName);
      }
      boolean synthetic = (mbd != null && mbd.isSynthetic());

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