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

      }
      finally {
        // Finished partial creation of this bean.
        afterSingletonCreation(beanName);
      }
      FactoryBean fb = getFactoryBean(beanName, instance);
      if (bw != null) {
        this.factoryBeanInstanceCache.put(beanName, bw);
      }
      return fb;
    }

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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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   * <p>The shortcut check for a FactoryBean is only applied in case of a singleton
   * FactoryBean. If the FactoryBean instance itself is not kept as singleton,
   * it will be fully created to check the type of its exposed object.
   */
  protected Class getTypeForFactoryBean(String beanName, RootBeanDefinition mbd) {
    FactoryBean fb = (mbd.isSingleton() ?
        getSingletonFactoryBeanForTypeCheck(beanName, mbd) :
        getNonSingletonFactoryBeanForTypeCheck(beanName, mbd));


    if (fb != null) {
      // Try to obtain the FactoryBean's object type from this early stage of the instance.

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      }
      finally {
        // Finished partial creation of this bean.
        afterSingletonCreation(beanName);
      }
      FactoryBean fb = getFactoryBean(beanName, instance);
      if (bw != null) {
        this.factoryBeanInstanceCache.put(beanName, bw);
      }
      return fb;
    }

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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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   * FactoryBean. If the FactoryBean instance itself is not kept as singleton,
   * it will be fully created to check the type of its exposed object.
   */
  @Override
  protected Class getTypeForFactoryBean(String beanName, RootBeanDefinition mbd) {
    FactoryBean fb = (mbd.isSingleton() ?
        getSingletonFactoryBeanForTypeCheck(beanName, mbd) :
        getNonSingletonFactoryBeanForTypeCheck(beanName, mbd));


    if (fb != null) {
      // Try to obtain the FactoryBean's object type from this early stage of the instance.

View Full Code Here

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