智能领域对象设计

public class ThinObject extends IObject {
	protected static Logger log = Logger.getLogger(IObject.class);
	static {
		/<strong>
		 * 这里建立了一种约定，一种对象的属性名与数据库中表字段名相互转换的约定。
		 */
		KVUtils.mappingRule = new AnnotationMappingRule();
	}

	/</strong>
	 * 在配置文件中加载自定义的SQL，存放在此处以供该类的方法使用
	 * 
	 */
	static Properties sqls = new Properties();

	transient protected BeanTable beanTable;

	/<strong>
	 * 把该类的所有属性，全部转化成key-value用于存储
	 * 
	 * @return
	 * @throws Exception
	 */
	protected Map<String, Object> toKeyValue() throws Exception {
		return KVUtils.toKeyValue(this);
	}

	protected Field hasPrimary() {
		Field[] fields = getClass().getDeclaredFields();
		for (Field field : fields) {
			Primary pry = field.getAnnotation(Primary.class);
			if (pry != null) {
				return field;
			}
		}
		return null;
	}

	/</strong>
	 * 该设计的持久方式采用的是'thin',<a
	 * href="http://sourceforge.net/projects/thinery/">thin</a>
	 * 是基于key-value的持久层框架，简单，易用，透析持久本质; 默认采用约定优先，注解在后的映射方式，还支持定义映射。
	 * 
	 * @return
	 * @throws SQLException
	 */
	protected BeanTable getBeanTable() throws SQLException {

		if (beanTable == null) {
			BeanTableName btn = this.getClass().getAnnotation(
					BeanTableName.class);
			String tableName = btn.name();
			String schema = btn.schema();
			if ("".endsWith(schema)) {
				beanTable = ThinContext.getThinContext()
						.getBeanTable(tableName);
			} else {
				beanTable = ThinContext.getThinContext(schema).getBeanTable(
						tableName);
			}
		}

		return beanTable;

	}

	public ThinObject() {
		if (!inited) {
			try {
				initSQLProperties();
			} catch (Exception e) {
				e.printStackTrace();
			}
			inited = true;
		}

	}

	private void initSQLProperties() throws IOException {
		InputStream inStream = this.getClass().getClassLoader()
				.getResourceAsStream(this.getThisName() + "_sql.properties");
		if (inStream != null) {
			sqls.load(inStream);
		}
	}

	@SuppressWarnings("unchecked")
	protected List toBeans(List<Map<String, Object>> keyvalues)
			throws Exception {
		return KVUtils.toBeans(keyvalues, this.getClass());
	}

	/<strong>
	 * 把对象自身持久的数据库的方法。子类可以根据类的情况，重写该方法。 如该类是一对一，一对多的，想把关联对象一起存储，就需要重写该方法
	 * 
	 * @throws RuntimeException
	 */
	public void remember() throws RuntimeException {
		try {
			this.getBeanTable().addOrUpdate(toKeyValue());

			this.setChanged();
			this.notifyObservers();
		} catch (Exception e) {
			log.error("记忆出现异常！", e);
			throw new RuntimeException(e);

		}
	}

	/</strong>
	 * 删除此对象对应的数据库记录。 恰如我们忘记一件事物
	 */
	public void forget() {
		try {
			this.getBeanTable().delete(toKeyValue());
			
			this.setChanged();
			this.notifyObservers();
		} catch (Exception e) {
			log.error("删除记录出现异常", e);
			throw new RuntimeException(e);
		}

	}

	public void updateMemory(String... updateFields) {
		try {
			Map<String, Object> keyvalues = new HashMap<String, Object>();
			for (String name : updateFields) {
				KVUtils.mappingRule.setDBColumn(this, this.getClass()
						.getDeclaredField(name), keyvalues);
			}

			Field primaryField = hasPrimary();
			if (primaryField != null
					&& !keyvalues.containsKey(primaryField.getName())) {
				KVUtils.mappingRule.setDBColumn(this, primaryField, keyvalues);
			}

			this.getBeanTable().update(keyvalues);

			this.setChanged();
			this.notifyObservers();
		} catch (Exception e) {
			log.error("更新存储出现异常", e);
			throw new RuntimeException(e);
		}
	}

	@SuppressWarnings("unchecked")
	public List<Object> associate(Object... params) {
		try {
			Criterion[] criterions=toCriterion(params);
			
			return this.toBeans(this.getBeanTable().get(criterions));
		} catch (Exception e) {
			log.error("查询记录出现异常", e);
			throw new RuntimeException(e);
		}
	}

	private Criterion[] toCriterion(Object... params) {
		Criterion[] criterions = new Criterion[params.length];
		for(int i=0;i<params.length;i++){
			criterions<i> = (Criterion)params<i>;
		}
		return criterions;
	}

	public void obtainMe() {
		try {
			Field field = this.hasPrimary();
			Object value = PropertyUtils.getProperty(this, field.getName());

			List<Map<String, Object>> keyvalues = this.getBeanTable().get(SQLCriterion.get(field.getName(), value));
			if(!keyvalues.isEmpty()){
				KVUtils.toBean(keyvalues.get(0), this);
			}

		} catch (Exception e) {
			log.error("查询记录出现异常", e);
			throw new RuntimeException(e);
		}
	}

}

@BeanTableName(name="z_user")
public class User extends ThinObject {

	@Primary
	String uid ;
	
	String uname;
	String rid;
	
	public User(String userid, String username) {
		super();
		this.uid = userid;
		this.uname = username;
	}
	
	public User() {
	}
	@Override
	public String toString() {
		return "(userid:"+uid+", username:"+uname+")";
	}

	public String getUid() {
		return uid;
	}

	public void setUid(String uid) {
		this.uid = uid;
	}

	public String getUname() {
		return uname;
	}

	public void setUname(String uname) {
		this.uname = uname;
	}

	public String getRid() {
		return rid;
	}
	public void setRid(String rid) {
		this.rid = rid;
	}
}

public class TestUser extends TestCase {

	static {
		new TryThinContext("zero");
		ThinContext.setDefaultSchema("zero");
	}
	
	public void testUpdate() throws SQLException{
		User user = new User("wanghh","洪");
		user.obtainMe();
		user.setUname("测试");
		user.updateMemory("uname");
		System.out.println(user.rid);
		
	}
	
	public void testAdd() throws SQLException{
		User user = new User("thinery","洪");
		user.setRid("admin");
		user.remember();
	}
	
	public void testDelete() throws SQLException{
		User user = new User();
		user.setUid("thinery");
		user.forget();
	}
	
	public void testQuery() throws SQLException{
		User user = new User();
		List<Object> users = user.associate(SQLCriterion.get("rid", Operator.EQ, "marketing"));
		System.out.println(users);
		
	}
	
	@Override
	protected void tearDown() throws Exception {
		ThinContext.ctx.cleanHoldConection();
	}
}