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

      throw e;
    }
  }
  public Class verifyKey(Object key){
    try{
      final Component c = getComponent(key);
      if(c==null){
        throw new UnresolvedComponentException(key);
      }
      return c.verify(getDependency(key));
    }
    catch(YanException e){
      e.push("verifyKey <" + key +">");
      throw e;
    }

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      throw e;
    }
  }
  public Class verifyType(Class type){
    try{
      final Component c = getComponentOfType(type);
      if(c==null)
        throw new UnresolvedComponentException(type);
      return c.verify(getDependencyOfType(type));
    }
    catch(YanException e){
      e.push("verifyType <" + Misc.getTypeName(type) +">");
      throw e;
    }

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      e.push("verifyType <" + Misc.getTypeName(type) +">");
      throw e;
    }
  }
  public Class getComponentType(Object key) {
    final Component cc = getComponent(key);
    if(cc==null) return null;
    return cc.getType();
  }

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  UnresolvedComponentException, UnsatisfiedComponentException, YanException {
    return instantiateComponent(key, cc, this);
  }
  public Object getInstance(Object key, ComponentMap cmap) {
    try{
      final Component cc = getComponent(key);
      if(cc==null){
        throw new UnresolvedComponentException(key);
      }
      return cc.create(cmap.getDependency(key,cmap));
    }
    catch(YanException e){
      e.push("getInstance <" + key + ">");
      throw e;
    }

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   * which makes it singleton.
   * Override {@link #defaultTransform(Component)} if a different default behavior
   * is desired.
   */
  public void registerStaticMethod(Class c, String name){
    final Component comp = Components.static_method(c, name);
    registerComponent(defaultTransform(comp));
  }

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   * which makes it singleton.
   * Override {@link #defaultTransform(Component)} if a different default behavior
   * is desired.
   */
  public void registerStaticMethod(Class c, String name, Class[] param_types){
    final Component comp = Components.static_method(c, name, param_types);
    registerComponent(defaultTransform(comp));
  }

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  }
  public void getInstances(Map store, ComponentMap cmap){
    try{
      for(Iterator it = keys().iterator(); it.hasNext();){
        final Object ky = it.next();
        final Component cc = getComponent(ky);
        store.put(ky, cc.create(cmap.getDependency(ky, cmap)));
      }
    }
    catch(YanException e){
      e.push("getInstances");
      throw e;

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    try{
      final java.util.Set ks = keys();
      final ArrayList ret = new ArrayList();
      for(Iterator it = ks.iterator(); it.hasNext();){
        final Object ky = it.next();
        final Component cc = getComponent(ky);
        ret.add(cc.create(cmap.getDependency(ky, cmap)));
      }
      return ret;
    }
    catch(YanException e){
      e.push("getInstances");

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  }
  public synchronized Component getComponent(final Object key) {
    return (Component)creators.get(key);
  }
  public synchronized boolean containsType(final Class type){
    Component cc = getComponent(type);
    if(cc!=null){
      final Class ctype = cc.getType();
      if(ctype == null
          || ReflectionUtil.isAssignableFrom(type, ctype)){
        //if the type is dynamically bound, we trust the key.
        return true;
      }
      cc = null;
    }
    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) &&
          //void type does actively feed itself to a by-type search.
          //It does suppress type error when forced to match against another type.
          ReflectionUtil.isAssignableFrom(
          type, typei)){

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      }
    }
    return false;
  }
  public synchronized Component getComponentOfType(final Class type){
    Component cc = getComponent(type);
    if(cc!=null){
      final Class ctype = cc.getType();
      if(ctype == null
          || ReflectionUtil.isAssignableFrom(type, ctype)){
        //if the type is dynamically bound, we trust the key.
        return cc;
      }
      cc = null;
    }
    Class subtype = null;
    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) &&
          //void type does actively feed itself to a by-type search.
          //It does suppress type error when forced to match against another type.
          ReflectionUtil.isAssignableFrom(
          type, typei)){

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