003 对象属性Property

public final class PropertyNamer {

  private PropertyNamer() {
    // Prevent Instantiation of Static Class
  }

  public static String methodToProperty(String name) {
    if (name.startsWith("is")) {
      name = name.substring(2);
    } else if (name.startsWith("get") || name.startsWith("set")) {
      name = name.substring(3);
    } else {
      throw new ReflectionException("Error parsing property name '" + name + "'.  Didn't start with 'is', 'get' or 'set'.");
    }

    if (name.length() == 1 || (name.length() > 1 && !Character.isUpperCase(name.charAt(1)))) {
      name = name.substring(0, 1).toLowerCase(Locale.ENGLISH) + name.substring(1);
    }

    return name;
  }

  public static boolean isProperty(String name) {
    return name.startsWith("get") || name.startsWith("set") || name.startsWith("is");
  }

  public static boolean isGetter(String name) {
    return name.startsWith("get") || name.startsWith("is");
  }

  public static boolean isSetter(String name) {
    return name.startsWith("set");
  }

}

　上面的PropertyNamer实际上就是一个工具类,通过方法名获取对应的属性.

实际上,就是我们的javaBean的方式,以此来推断属性的.

public final class PropertyCopier {

  private PropertyCopier() {
    // Prevent Instantiation of Static Class
  }

  public static void copyBeanProperties(Class<?> type, Object sourceBean, Object destinationBean) {
    Class<?> parent = type;
    while (parent != null) {
      final Field[] fields = parent.getDeclaredFields();
      for (Field field : fields) {
        try {
          try {
            field.set(destinationBean, field.get(sourceBean));
          } catch (IllegalAccessException e) {
            if (Reflector.canControlMemberAccessible()) {
              field.setAccessible(true);
              field.set(destinationBean, field.get(sourceBean));
            } else {
              throw e;
            }
          }
        } catch (Exception e) {
          // Nothing useful to do, will only fail on final fields, which will be ignored.
        }
      }
      parent = parent.getSuperclass();
    }
  }

}

　上面为属性拷贝工具类,实际上就是我们之前使用的BeanCopyUtils的一个简单实现.