今天實現了bean的構造方法注入和set方法注入，明顯感覺邏輯開始變得複雜混亂，明天休息一天整理下看看。
一 將Context構造方法的邏輯抽取爲refresh方法。
二 昨天未考慮到如果bean中沒有預設的構造方法就無法用newInstance方法
獲取範例。
在setBean方法中加入識別：
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private void setBean(Class<?> c) throws IllegalAccessException, InstantiationException { if (c.isAnnotationPresent(Component.class)) { boolean flag = true; for (Constructor<?> constructor : c.getDeclaredConstructors()) { if (constructor.getParameterCount() == 0) { Object instance = c.newInstance(); beanMap.put(c, new BeanDefine(StringUtil.firstToLowerCase(c.getSimpleName()), instance)); flag = false; break; } } if (flag) { needArgsToCreateBeans.add(c); } } } |
createBean方法如下：
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private Object createBean(Class<?> c) throws IllegalAccessException, InstantiationException, InvocationTargetException { for (Constructor<?> constructor : c.getDeclaredConstructors()) { constructor.setAccessible(true); if (constructor.getParameterCount() == 0) { return c.newInstance(); } else { Parameter[] parameters = constructor.getParameters(); Object[] objs = new Object[parameters.length]; for (int i = 0; i < parameters.length; i++) { System.out.println(getBean(parameters[i].getType())); objs[i] = getBean(parameters[i].getType()); } return constructor.newInstance(objs); } } return null; } |
其中，無預設構造方法的bean被放入
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private static final Set<Class<?>> needArgsToCreateBeans = new HashSet<>(); |
中，等待其他bean載入後載入：
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for (Class<?> aClass : classes) { setBean(aClass); } for (Class<?> aClass : classes) { setField(aClass); } for (Class<?> c : needArgsToCreateBeans) { Object bean = createBean(c); beanMap.put(c, new BeanDefine(StringUtil.firstToLowerCase(c.getSimpleName()), bean)); } |
並且對refresh方法的異常做了進一步的修改：
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catch (IllegalArgumentException e) { logger.error("***** {}", e.getMessage()); logger.error("***** help : can not find bean in context, please check the class you need autowired"); e.printStackTrace(); } catch (IllegalAccessException e) { logger.error("***** {}", e.getMessage()); logger.error("***** help : wrong in reflect , waiting for repairing"); e.printStackTrace(); } catch (InvocationTargetException e) { logger.error("***** {}", e.getMessage()); logger.error("***** help : wrong in invoking method by reflect, please check the class you need autowired"); e.printStackTrace(); } catch (Exception e) { logger.error("***** something wrong in create context : {}", e.getMessage()); e.printStackTrace(); } |
，，，，，，太亂了！！！