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

      for (Iterator it = this.beanDefinitionNames.iterator(); it.hasNext();) {
        String beanName = (String) it.next();
        RootBeanDefinition bd = getMergedLocalBeanDefinition(beanName);
        if (!bd.isAbstract() && bd.isSingleton() && !bd.isLazyInit()) {
          if (isFactoryBean(beanName)) {
            FactoryBean factory = (FactoryBean) getBean(FACTORY_BEAN_PREFIX + beanName);
            if (factory instanceof SmartFactoryBean && ((SmartFactoryBean) factory).isEagerInit()) {
              getBean(beanName);
            }
          }
          else {

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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 ((includeNonSingletons || factory.isSingleton()) &&
              objectType != null && type.isAssignableFrom(objectType)) {
            matches.put(beanName, getBean(beanName));
          }
        }
      }

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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)) {
        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) doGetBean(FACTORY_BEAN_PREFIX + beanName, FactoryBean.class, null, true);
      return getTypeForFactoryBean(factoryBean);
    }
    catch (BeanCreationException ex) {
      // Can only happen when getting a FactoryBean.

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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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        ClassLoader classLoader = MBeanServerFactoryBean.class.getClassLoader();
        try {
            
            // Try to use the xbean tiger version first...
            FactoryBean fb = (FactoryBean) classLoader.loadClass("org.apache.xbean.tiger.MBeanServerFactoryBean").newInstance();
            return fb.getObject();
            
        } catch (Throwable e) {
            
            // Fallback to using the spring factory bean then 
            FactoryBean fb = (FactoryBean) classLoader.loadClass("org.springframework.jmx.support.MBeanServerFactoryBean").newInstance();
            ((InitializingBean)fb).afterPropertiesSet();
            return fb.getObject();
            
        }
    }

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      ServiceReference s = hasServiceProperty(pd);
      if (s != null && !pvs.contains(pd.getName())) {
        try {
          if (logger.isDebugEnabled())
            logger.debug("Processing annotation [" + s + "] for [" + beanName + "." + pd.getName() + "]");
          FactoryBean importer = getServiceImporter(s, pd.getWriteMethod(), beanName);
          // BPPs are created in stageOne(), even though they are run in stageTwo(). This check means that
          // the call to getObject() will not fail with ServiceUnavailable. This is safe to do because
          // ServiceReferenceDependencyBeanFactoryPostProcessor will ensure that mandatory services are
          // satisfied before stageTwo() is run.
          if (bean instanceof BeanPostProcessor) {
            ImporterCallAdapter.setCardinality(importer, Cardinality.C_0__1);
          }
          newprops.addPropertyValue(pd.getName(), importer.getObject());
        }
        catch (Exception e) {
          throw new FatalBeanException("Could not create service reference", e);
        }
      }

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    @Inject Environment env;


    @Bean
    public FactoryBean testBean() {
      final String name = env.getProperty("testbean.name");
      return new FactoryBean() {
        @Override
        public Object getObject() {
          return new TestBean(name);
        }
        @Override

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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.

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