Examples of jfun.yan.Component

jfun.yan.Component
Responsible for component instance creation and verification.
Component is immutable. All update functions such as the ones started with "with" are functional-update, which means a new Component object is created to reflect the change, while the state of the old object remains the same.

Component is the core of Yan in the sense that most customizations of instance creation strategy can be done by combining existing Component objects.

This is called a "combinator" approach where complex components can be constructed by combining simpler components who may be combinations of yet simpler components.

Common combinators are included in this class to make the syntax simpler for combining components. For example:
comp1.withArguments(args) rather than Components.withArguments(comp1, args)
Codehaus.org. @author Ben Yu @see Components @see jfun.yan.Monad

    return cc;
  }
  public synchronized java.util.List getComponentsOfType(final Class type){
    final java.util.ArrayList ret = new java.util.ArrayList();
    for(Iterator it=creators.values().iterator();it.hasNext();){
      final Component cci = (Component)it.next();
      final Class typei = cci.getType();
      if(typei!=null && 
          !void.class.equals(typei) && ReflectionUtil.isAssignableFrom(
          type, typei)){
        ret.add(cci);
      }

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    }
    return ret;
  }
  public synchronized void unregisterComponentsOfType(Class type){
    for(Iterator it=creators.values().iterator();it.hasNext();){
      final Component cci = (Component)it.next();
      final Class typei = cci.getType();
      if(typei!=null && ReflectionUtil.isAssignableFrom(
          type, typei)){
        it.remove();
      }
    }

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  }
  public synchronized void verify(final ComponentMap cmap) {
    for(Iterator it=creators.keySet().iterator();it.hasNext();){
      final Object ki = it.next();
      try{
        final Component cc = (Component)creators.get(ki);
        cc.verify(cmap.getDependency(ki, cmap));
      }
      catch(YanException e){
        e.push("verify <" + ki +">");
        throw e;
      }

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            autowire_txman
        ).label("transaction manager auto detection");
    }
    final Class type = c.getType();


    final Component r = createSpringBeanComponent(c, ctxt, transaction_manager, transaction_attributes, interfaces);
    if(type!=null && BeanPostProcessor.class.isAssignableFrom(type)){
      //does bpp suffer from proxies?
      ctxt.addBeanPostProcessor(ctxt.getTagName(), c);
    }
    if(type!=null && FactoryBean.class.isAssignableFrom(type)){
      //for factory bean, we do not know its type in advance.
      return r;
    }
    if(transaction_attributes!=null){
      //for beans to be proxied, we do not know the type.
      return r;
    }
    if(r.getType()==null && type!=null)
      return ctxt.cast(type, r);
    else return r;
  }

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    final Class type = c.getType();
    if(type!=null && FactoryBean.class.isAssignableFrom(type)){
      return c;
    }
    else{
      final Component fbc = (Component)NutsUtils.getState(c, factory_bean_key);
      return fbc;
    }
  }

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   * @param key the key of the FactoryBean component. The key doesn't need to be
   * prefixed with a '&' as one has to do in Spring.
   * @return the FactoryBean instance.
   */
  public static FactoryBean getFactoryBean(Container yan, Object key){
    final Component c = yan.getComponent(key);
    if(c==null){
      return null;
    }
    final Component fbc = getFactoryBeanComponent(c);
    if(fbc==null){
      return null;
    }
    return (FactoryBean)yan.instantiateComponent(fbc);
  }

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    final boolean for_factorybean = isFactoryBeanType(type);
    for(Iterator it=yan.keys().iterator();it.hasNext();){
      final Object key = it.next();
      if(!(key instanceof String)) continue;
      final jfun.yan.Component c = yan.getComponent(key);
      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);

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      }
    };
    return result;
  }
  private Component findComponent(String name){
    final Component c = yan.getComponent(name);
    if(c==null){
      throw new NoSuchBeanDefinitionException(name, "bean "+name+" not found.");
    }
    return c;
  }

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   */
  public Object getBean(final String beanname, Class requiredType) throws BeansException {
    if(BeanFactoryUtils.isFactoryDereference(beanname)){
      //return FactoryBean
      final String factoryname = BeanFactoryUtils.transformedBeanName(beanname);
      final Component c = findComponent(factoryname);
      final Component fbc = SpringAdapter.getFactoryBeanComponent(c);
      if(fbc!=null){
        throw new NoSuchBeanDefinitionException(beanname, 
            "FactoryBean "+factoryname+" not found.");
      }
      final Object result = instantiate(fbc);
      checkBeanInstanceType(beanname, requiredType, result);
      return result;
    }
    else{
      final Component c = findComponent(beanname);
      final Component fbc = SpringAdapter.getFactoryBeanComponent(c);
      if(requiredType==null){
        return instantiate(c);
      }
      if(fbc!=null){
        final FactoryBean fb = (FactoryBean)instantiate(fbc);

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   * FactoryBean is instantiated if the name doesn't start with '&'
   * and the bean is a FactoryBean.
   */
  public boolean isSingleton(final String name)
  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();
      }
    }

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