聊聊Mybatis反射之ObjectWrapper的使用

private MetaClass(Class<?> type, ReflectorFactory reflectorFactory) {
    this.reflectorFactory = reflectorFactory;
    this.reflector = reflectorFactory.findForClass(type);
  }

public boolean hasSetter(String name) {
    PropertyTokenizer prop = new PropertyTokenizer(name);
    if (prop.hasNext()) {
      if (reflector.hasSetter(prop.getName())) {
        MetaClass metaProp = metaClassForProperty(prop.getName());
        return metaProp.hasSetter(prop.getChildren());
      } else {
        return false;
      }
    } else {
      return reflector.hasSetter(prop.getName());
    }
  }

  public boolean hasGetter(String name) {
    PropertyTokenizer prop = new PropertyTokenizer(name);
    if (prop.hasNext()) {
      if (reflector.hasGetter(prop.getName())) {
        MetaClass metaProp = metaClassForProperty(prop);
        return metaProp.hasGetter(prop.getChildren());
      } else {
        return false;
      }
    } else {
      return reflector.hasGetter(prop.getName());
    }
  }

  private final Collection<Object> object;
  @Override
  public boolean isCollection() {
    return true;
  }

  @Override
  public void add(Object element) {
    object.add(element);
  }

  @Override
  public <E> void addAll(List<E> element) {
    object.addAll(element);
  }

protected Object resolveCollection(PropertyTokenizer prop, Object object) {
    if ("".equals(prop.getName())) {
      return object;
    } else {
      // 这里会循环调用，解析下层
      return metaObject.getValue(prop.getName());
    }
  }

@Override
  public Object get(PropertyTokenizer prop) {
    if (prop.getIndex() != null) {
      // 不是单一属性，而是有数组
      Object collection = resolveCollection(prop, object);
      return getCollectionValue(prop, collection);
    } else {
      return getBeanProperty(prop, object);
    }
  }

  @Override
  public void set(PropertyTokenizer prop, Object value) {
    if (prop.getIndex() != null) {
      Object collection = resolveCollection(prop, object);
      setCollectionValue(prop, collection, value);
    } else {
      setBeanProperty(prop, object, value);
    }
  }