import org.nutz.dao.entity.annotation.Id; //导入依赖的package包/类
/**
 * 根据 Java 字段创建一个实体字段信息对象
 * 
 * @param pk
 *            复合主键
 * @param field
 *            Java 字段
 * @return 字段信息对象
 */
public static MappingInfo createMappingInfo(PK pk, Field field) {
    MappingInfo info = create(MappingInfo.class, field);
    info.annPK = pk;
    info.annColumn = field.getAnnotation(Column.class);
    info.annDefine = field.getAnnotation(ColDefine.class);
    info.annDefault = field.getAnnotation(Default.class);
    info.annId = field.getAnnotation(Id.class);
    info.annName = field.getAnnotation(Name.class);
    info.annNext = field.getAnnotation(Next.class);
    info.annPrev = field.getAnnotation(Prev.class);
    info.annReadonly = field.getAnnotation(Readonly.class);
    info.columnComment = field.getAnnotation(Comment.class);
    
    //检查@Id和@Name的属性类型
    if (info.annId != null) {
        if (!Mirror.me(field.getType()).isIntLike())
            throw Lang.makeThrow(DaoException.class, "Field(%s) annotation @Id , but not Number type!!", field);
    }
    
    if (info.annName != null)
        if (!Mirror.me(field.getType()).isStringLike())
            throw Lang.makeThrow(DaoException.class, "Field(%s) annotation @Name , but not String type!!", field);
    
    return info;
}
 

import org.nutz.dao.entity.annotation.Id; //导入依赖的package包/类
/**
 * 根据 getter/setter 函数获取一个实体字段信息对象
 * 
 * @param pk
 *            复合主键
 * @param method
 *            方法：可能是 getter 或者是 setter
 * @return 字段信息对象
 */
public static MappingInfo createMapingInfo(PK pk, Method method) {
    MappingInfo info = create(MappingInfo.class, method);
    info.annPK = pk;
    info.annColumn = method.getAnnotation(Column.class);
    info.annDefine = method.getAnnotation(ColDefine.class);
    info.annDefault = method.getAnnotation(Default.class);
    info.annId = method.getAnnotation(Id.class);
    info.annName = method.getAnnotation(Name.class);
    info.annNext = method.getAnnotation(Next.class);
    info.annPrev = method.getAnnotation(Prev.class);
    info.annReadonly = method.getAnnotation(Readonly.class);
    return info;
}