/**
* 通过反射,获得定义Class时声明的父类的泛型参数的类型. 如public UserDao extends HibernateDao<User,Long>
*
* @param clazz clazz The class to introspect
* @param index the Index of the generic ddeclaration,start from 0.
* @return the index generic declaration, or Object.class if cannot be determined
*/
@SuppressWarnings("unchecked")
public static Class getSuperClassGenricType(final Class clazz, final int index) {
Type genType = clazz.getGenericSuperclass();
if (!(genType instanceof ParameterizedType)) {
VALog.w(clazz.getSimpleName() + "'s superclass not ParameterizedType");
return Object.class;
}
Type[] params = ((ParameterizedType) genType).getActualTypeArguments();
if (index >= params.length || index < 0) {
VALog.w(
"Index: "
+ index
+ ", Size of "
+ clazz.getSimpleName()
+ "'s Parameterized Type: "
+ params.length);
return Object.class;
}
if (!(params[index] instanceof Class)) {
VALog.w(clazz.getSimpleName() + " not set the actual class on superclass generic parameter");
return Object.class;
}
return (Class) params[index];
}
/** 直接设置对象属性值,无视private/protected修饰符,不经过setter函数. */
public static void setFieldValue(
final Object object, final String fieldName, final Object value) {
Field field = getDeclaredField(object, fieldName);
if (field == null)
throw new IllegalArgumentException(
"Could not find field [" + fieldName + "] on target [" + object + "]");
makeAccessible(field);
try {
field.set(object, value);
} catch (IllegalAccessException e) {
VALog.e("不可能抛出的异常:{}" + e.getMessage());
}
}
/** 直接读取对象属性值,无视private/protected修饰符,不经过getter函数. */
public static Object getFieldValue(final Object object, final String fieldName) {
Field field = getDeclaredField(object, fieldName);
if (field == null)
throw new IllegalArgumentException(
"Could not find field [" + fieldName + "] on target [" + object + "]");
makeAccessible(field);
Object result = null;
try {
result = field.get(object);
} catch (IllegalAccessException e) {
VALog.e("不可能抛出的异常{}" + e.getMessage());
}
return result;
}
