/*Copyright ©2016 TommyLemon(https://github.com/TommyLemon/APIJSON)

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.*/

package apijson.orm;

import static apijson.JSONObject.KEY_COMBINE;
import static apijson.JSONObject.KEY_DROP;
import static apijson.JSONObject.KEY_TRY;
import static apijson.RequestMethod.POST;
import static apijson.RequestMethod.PUT;
import static apijson.orm.SQLConfig.TYPE_ITEM;

import java.rmi.ServerException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import javax.activation.UnsupportedDataTypeException;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import apijson.JSONResponse;
import apijson.Log;
import apijson.NotNull;
import apijson.RequestMethod;
import apijson.StringUtil;
import apijson.orm.AbstractFunctionParser.FunctionBean;
import apijson.orm.exception.ConflictException;
import apijson.orm.exception.NotExistException;


/**简化Parser，getObject和getArray(getArrayConfig)都能用
 * @author Lemon
 */
public abstract class AbstractObjectParser implements ObjectParser {
	private static final String TAG = "AbstractObjectParser";

	@NotNull
	protected AbstractParser<?> parser;
	public AbstractObjectParser setParser(AbstractParser<?> parser) {
		this.parser = parser;
		return this;
	}


	protected JSONObject request;//不用final是为了recycle
	protected String parentPath;//不用final是为了recycle
	protected SQLConfig arrayConfig;//不用final是为了recycle
	protected boolean isSubquery;

	protected final int type;
	protected final List<Join> joinList;
	protected final boolean isTable;
	protected final String path;
	protected final String name;
	protected final String table;
	protected final String alias;


	protected final boolean tri;
	/**
	 * TODO Parser内要不因为 非 TYPE_ITEM_CHILD_0 的Table 为空导致后续中断。
	 */
	protected final boolean drop;

	/**for single object
	 * @param parentPath
	 * @param request
	 * @param name
	 * @throws Exception 
	 */
	public AbstractObjectParser(@NotNull JSONObject request, String parentPath, String name, SQLConfig arrayConfig, boolean isSubquery) throws Exception {
		if (request == null) {
			throw new IllegalArgumentException(TAG + ".ObjectParser  request == null!!!");
		}
		this.request = request;
		this.parentPath = parentPath;
		this.arrayConfig = arrayConfig;
		this.isSubquery = isSubquery;

		this.type = arrayConfig == null ? 0 : arrayConfig.getType();
		this.joinList = arrayConfig == null ? null : arrayConfig.getJoinList();
		this.name = name;
		this.path = AbstractParser.getAbsPath(parentPath, name);

		apijson.orm.Entry<String, String> entry = Pair.parseEntry(name, true);
		this.table = entry.getKey();
		this.alias = entry.getValue();
		this.isTable = apijson.JSONObject.isTableKey(table);

		this.objectCount = 0;
		this.arrayCount = 0;

		boolean isEmpty = request.isEmpty();//empty有效 User:{}
		if (isEmpty) {
			this.tri = false;
			this.drop = false;
		}
		else {
			this.tri = request.getBooleanValue(KEY_TRY);
			this.drop = request.getBooleanValue(KEY_DROP);

			request.remove(KEY_TRY);
			request.remove(KEY_DROP);
		}


		Log.d(TAG, "AbstractObjectParser  table = " + table + "; isTable = " + isTable);
		Log.d(TAG, "AbstractObjectParser  isEmpty = " + isEmpty + "; tri = " + tri + "; drop = " + drop);
	}


	private boolean invalidate = false;
	public void invalidate() {
		invalidate = true;
	}
	public boolean isInvalidate() {
		return invalidate;
	}

	private boolean breakParse = false;
	public void breakParse() {
		breakParse = true;
	}
	public boolean isBreakParse() {
		return breakParse || isInvalidate();
	}


	protected JSONObject response;
	protected JSONObject sqlRequest;
	protected JSONObject sqlReponse;
	/**
	 * 自定义关键词
	 */
	protected Map<String, Object> customMap;
	/**
	 * 远程函数
	 * {"-":{ "key-()":value }, "0":{ "key()":value }, "+":{ "key+()":value } }
	 * - : 在executeSQL前解析
	 * 0 : 在executeSQL后、onChildParse前解析
	 * + : 在onChildParse后解析
	 */
	protected Map<String, Map<String, String>> functionMap;
	/**
	 * 子对象
	 */
	protected Map<String, JSONObject> childMap;

	private int objectCount;
	private int arrayCount;
	/**解析成员
	 * response重新赋值
	 * @return null or this
	 * @throws Exception
	 */
	@Override
	public AbstractObjectParser parse() throws Exception {
		if (isInvalidate() == false) {
			breakParse = false;

			response = new JSONObject(true);//must init

			sqlRequest = new JSONObject(true);//must init

			sqlReponse = null;//must init
			customMap = null;//must init
			functionMap = null;//must init
			childMap = null;//must init

			Set<Entry<String, Object>> set = new LinkedHashSet<Entry<String, Object>>(request.entrySet());
			if (set != null && set.isEmpty() == false) {//判断换取少几个变量的初始化是否值得？
				if (isTable) {//非Table下必须保证原有顺序！否则 count,page 会丢, total@:"/[]/total" 会在[]:{}前执行！
					customMap = new LinkedHashMap<String, Object>();
					childMap = new LinkedHashMap<String, JSONObject>();
				}
				functionMap = new LinkedHashMap<String, Map<String, String>>();//必须执行


				//条件<<<<<<<<<<<<<<<<<<<
				List<String> whereList = null;
				if (method == PUT) { //这里只有PUTArray需要处理  || method == DELETE) {
					String[] combine = StringUtil.split(request.getString(KEY_COMBINE));
					if (combine != null) {
						String w;
						for (int i = 0; i < combine.length; i++) { //去除 &,|,! 前缀
							w = combine[i];
							if (w != null && (w.startsWith("&") || w.startsWith("|") || w.startsWith("!"))) {
								combine[i] = w.substring(1);
							}
						}
					}
					//Arrays.asList()返回值不支持add方法！
					whereList = new ArrayList<String>(Arrays.asList(combine != null ? combine : new String[]{}));
					whereList.add(apijson.JSONRequest.KEY_ID);
					whereList.add(apijson.JSONRequest.KEY_ID_IN);
				}
				//条件>>>>>>>>>>>>>>>>>>>

				String key;
				Object value;
				int index = 0;

				for (Entry<String, Object> entry : set) {
					if (isBreakParse()) {
						break;
					}

					value = entry.getValue();
					if (value == null) {
						continue;
					}
					key = entry.getKey();

					try {
						if (value instanceof JSONObject && key.startsWith("@") == false && key.endsWith("@") == false) { //JSONObject，往下一级提取
							if (childMap != null) {//添加到childMap，最后再解析
								childMap.put(key, (JSONObject)value);
							}
							else { //直接解析并替换原来的，[]:{} 内必须直接解析，否则会因为丢掉count等属性，并且total@:"/[]/total"必须在[]:{} 后！
								response.put(key, onChildParse(index, key, (JSONObject)value));
								index ++;
							}
						}
						else if ((method == POST || method == PUT) && value instanceof JSONArray && JSONRequest.isTableArray(key)) { //JSONArray，批量新增或修改，往下一级提取
							onTableArrayParse(key, (JSONArray) value);
						}
						else if (method == PUT && value instanceof JSONArray
								&& (whereList == null || whereList.contains(key) == false)) { //PUT JSONArray
							onPUTArrayParse(key, (JSONArray) value);
						}
						else {//JSONArray或其它Object，直接填充
							if (onParse(key, value) == false) {
								invalidate();
							}
						}
					} catch (Exception e) {
						if (tri == false) {
							throw e;//不忽略错误，抛异常
						}
						invalidate();//忽略错误，还原request
					}
				}

				//非Table内的函数会被滞后在onChildParse后调用！ onFunctionResponse("-");
			}

			if (isTable) {
				if (sqlRequest.get(JSONRequest.KEY_DATABASE) == null && parser.getGlobleDatabase() != null) {
					sqlRequest.put(JSONRequest.KEY_DATABASE, parser.getGlobleDatabase());
				}
				if (sqlRequest.get(JSONRequest.KEY_SCHEMA) == null && parser.getGlobleSchema() != null) {
					sqlRequest.put(JSONRequest.KEY_SCHEMA, parser.getGlobleSchema());
				}
				if (isSubquery == false) {  //解决 SQL 语法报错，子查询不能 EXPLAIN
					if (sqlRequest.get(JSONRequest.KEY_EXPLAIN) == null && parser.getGlobleExplain() != null) {
						sqlRequest.put(JSONRequest.KEY_EXPLAIN, parser.getGlobleExplain());
					}
					if (sqlRequest.get(JSONRequest.KEY_CACHE) == null && parser.getGlobleCache() != null) {
						sqlRequest.put(JSONRequest.KEY_CACHE, parser.getGlobleCache());
					}
				}
			}
		}

		if (isInvalidate()) {
			recycle();
			return null;
		}

		return this;
	}





	/**解析普通成员
	 * @param key
	 * @param value
	 * @return whether parse succeed
	 */
	@Override
	public boolean onParse(@NotNull String key, @NotNull Object value) throws Exception {
		if (key.endsWith("@")) {//StringUtil.isPath((String) value)) {

			if (value instanceof JSONObject) { // SQL 子查询对象，JSONObject -> SQLConfig.getSQL
				String replaceKey = key.substring(0, key.length() - 1);//key{}@ getRealKey

				JSONObject subquery = (JSONObject) value;
				String range = subquery.getString(JSONRequest.KEY_SUBQUERY_RANGE);
				if (range != null && JSONRequest.SUBQUERY_RANGE_ALL.equals(range) == false && JSONRequest.SUBQUERY_RANGE_ANY.equals(range) == false) {
					throw new IllegalArgumentException("子查询 " + path + "/" + key + ":{ range:value } 中 value 只能为 [" + JSONRequest.SUBQUERY_RANGE_ALL + ", " + JSONRequest.SUBQUERY_RANGE_ANY + "] 中的一个！");
				}


				JSONArray arr = parser.onArrayParse(subquery, path, key, true);

				JSONObject obj = arr == null || arr.isEmpty() ? null : arr.getJSONObject(0);
				if (obj == null) {
					throw new Exception("服务器内部错误，解析子查询 " + path + "/" + key + ":{ } 为 Subquery 对象失败！");
				}

				String from = subquery.getString(JSONRequest.KEY_SUBQUERY_FROM);
				JSONObject arrObj = from == null ? null : obj.getJSONObject(from);
				if (arrObj == null) {
					throw new IllegalArgumentException("子查询 " + path + "/" + key + ":{ from:value } 中 value 对应的主表对象 " + from + ":{} 不存在！");
				}
				//				
				SQLConfig cfg = (SQLConfig) arrObj.get(AbstractParser.KEY_CONFIG);
				if (cfg == null) {
					throw new NotExistException(TAG + ".onParse  cfg == null");
				}

				Subquery s = new Subquery();
				s.setPath(path);
				s.setOriginKey(key);
				s.setOriginValue(subquery);

				s.setFrom(from);
				s.setRange(range);
				s.setKey(replaceKey);
				s.setConfig(cfg);

				key = replaceKey;
				value = s; //(range == null || range.isEmpty() ? "" : "range") + "(" + cfg.getSQL(false) + ") ";

				parser.putQueryResult(AbstractParser.getAbsPath(path, key), s); //字符串引用保证不了安全性 parser.getSQL(cfg));
			}
			else if (value instanceof String) { // 引用赋值路径

				//						System.out.println("getObject  key.endsWith(@) >> parseRelation = " + parseRelation);
				String replaceKey = key.substring(0, key.length() - 1);//key{}@ getRealKey
				String targetPath = AbstractParser.getValuePath(type == TYPE_ITEM
						? path : parentPath, new String((String) value));

				//先尝试获取，尽量保留缺省依赖路径，这样就不需要担心路径改变
				Object target = onReferenceParse(targetPath);
				Log.i(TAG, "onParse targetPath = " + targetPath + "; target = " + target);

				if (target == null) {//String#equals(null)会出错
					Log.d(TAG, "onParse  target == null  >>  return true;");
					return true;
				}
				if (target instanceof Map) { //target可能是从requestObject里取出的 {}
					if (isTable || targetPath.endsWith("[]/" + JSONResponse.KEY_INFO) == false) {
						Log.d(TAG, "onParse  target instanceof Map  >>  return false;");
						return false; //FIXME 这个判断现在来看是否还有必要？为啥不允许为 JSONObject ？以前可能因为防止二次遍历再解析，现在只有一次遍历
					}
				}
				if (targetPath.equals(target)) {//必须valuePath和保证getValueByPath传进去的一致！
					Log.d(TAG, "onParse  targetPath.equals(target)  >>");

					//非查询关键词 @key 不影响查询，直接跳过
					if (isTable && (key.startsWith("@") == false || JSONRequest.TABLE_KEY_LIST.contains(key))) {
						Log.e(TAG, "onParse  isTable && (key.startsWith(@) == false"
								+ " || JSONRequest.TABLE_KEY_LIST.contains(key)) >>  return null;");
						return false;//获取不到就不用再做无效的query了。不考虑 Table:{Table:{}}嵌套
					} else {
						Log.d(TAG, "onParse  isTable(table) == false >> return true;");
						return true;//舍去，对Table无影响
					}
				} 

				//直接替换原来的key@:path为key:target
				Log.i(TAG, "onParse    >>  key = replaceKey; value = target;");
				key = replaceKey;
				value = target;
				Log.d(TAG, "onParse key = " + key + "; value = " + value);
			}
			else {
				throw new IllegalArgumentException(path + "/" + key + ":value 中 value 必须为 依赖路径String 或 SQL子查询JSONObject ！");
			}

		}

		if (key.endsWith("()")) {
			if (value instanceof String == false) {
				throw new IllegalArgumentException(path + "/" + key + ":value 中 value 必须为函数String！");
			}

			String k = key.substring(0, key.length() - 2);

			String type; //远程函数比较少用，一般一个Table:{}内用到也就一两个，所以这里用 "-","0","+" 更直观，转用 -1,0,1 对性能提升不大。
			if (k.endsWith("-")) { //不能封装到functionMap后批量执行，否则会导致非Table内的 key-():function() 在onChildParse后执行！
				type = "-";
				k = k.substring(0, k.length() - 1);

				parseFunction(k, (String) value, parentPath, name, request);
			}
			else {
				if (k.endsWith("+")) {
					type = "+";
					k = k.substring(0, k.length() - 1);
				}
				else {
					type = "0";
				}

				//远程函数比较少用，一般一个Table:{}内用到也就一两个，所以这里循环里new出来对性能影响不大。
				Map<String, String> map = functionMap.get(type);
				if (map == null) {
					map = new LinkedHashMap<>();
				}
				map.put(k, (String) value);

				functionMap.put(type, map);
			}
		}
		else if (isTable && key.startsWith("@") && JSONRequest.TABLE_KEY_LIST.contains(key) == false) {
			customMap.put(key, value);
		}
		else {
			sqlRequest.put(key, value);
		}

		return true;
	}



	/**
	 * @param key
	 * @param value
	 * @param isFirst 
	 * @return
	 * @throws Exception
	 */
	@Override
	public JSON onChildParse(int index, String key, JSONObject value) throws Exception {
		boolean isFirst = index <= 0;
		boolean isMain = isFirst && type == TYPE_ITEM;

		JSON child;
		boolean isEmpty;

		if (apijson.JSONObject.isArrayKey(key)) {//APIJSON Array
			if (isMain) {
				throw new IllegalArgumentException(parentPath + "/" + key + ":{} 不合法！"
						+ "数组 []:{} 中第一个 key:{} 必须是主表 TableKey:{} ！不能为 arrayKey[]:{} ！");
			}

			if (arrayConfig == null || arrayConfig.getPosition() == 0) {
				arrayCount ++;
				int maxArrayCount = parser.getMaxArrayCount();
				if (arrayCount > maxArrayCount) {
					throw new IllegalArgumentException(path + " 内截至 " + key + ":{} 时数组对象 key[]:{} 的数量达到 " + arrayCount + " 已超限，必须在 0-" + maxArrayCount + " 内 !");
				}
			}

			child = parser.onArrayParse(value, path, key, isSubquery);
			isEmpty = child == null || ((JSONArray) child).isEmpty();
		}
		else {//APIJSON Object
			boolean isTableKey = JSONRequest.isTableKey(Pair.parseEntry(key, true).getKey());
			if (type == TYPE_ITEM && isTableKey == false) {
				throw new IllegalArgumentException(parentPath + "/" + key + ":{} 不合法！"
						+ "数组 []:{} 中每个 key:{} 都必须是表 TableKey:{} 或 数组 arrayKey[]:{} ！");
			}

			if (//避免使用 "test":{"Test":{}} 绕过限制，实现查询爆炸   isTableKey && 
					(arrayConfig == null || arrayConfig.getPosition() == 0)) {
				objectCount ++;
				int maxObjectCount = parser.getMaxObjectCount();
				if (objectCount > maxObjectCount) {
					throw new IllegalArgumentException(path + " 内截至 " + key + ":{} 时对象 key:{} 的数量达到 " + objectCount + " 已超限，必须在 0-" + maxObjectCount + " 内 !");
				}
			}

			child = parser.onObjectParse(value, path, key, isMain ? arrayConfig.setType(SQLConfig.TYPE_ITEM_CHILD_0) : null, isSubquery);

			isEmpty = child == null || ((JSONObject) child).isEmpty();
			if (isFirst && isEmpty) {
				invalidate();
			}
		}
		Log.i(TAG, "onChildParse  ObjectParser.onParse  key = " + key + "; child = " + child);

		return isEmpty ? null : child;//只添加! isChildEmpty的值，可能数据库返回数据不够count
	}



	//TODO 改用 MySQL json_add,json_remove,json_contains 等函数！ 
	/**PUT key:[]
	 * @param key
	 * @param array
	 * @throws Exception
	 */
	@Override
	public void onPUTArrayParse(@NotNull String key, @NotNull JSONArray array) throws Exception {
		if (isTable == false || array.isEmpty()) {
			Log.e(TAG, "onPUTArrayParse  isTable == false || array == null || array.isEmpty() >> return;");
			return;
		}

		int putType = 0;
		if (key.endsWith("+")) {//add
			putType = 1;
		} else if (key.endsWith("-")) {//remove
			putType = 2;
		} else {//replace
			//			throw new IllegalAccessException("PUT " + path + ", PUT Array不允许 " + key + 
			//					" 这种没有 + 或 - 结尾的key！不允许整个替换掉原来的Array！");
		}
		String realKey = AbstractSQLConfig.getRealKey(method, key, false, false, "`"); //FIXME PG 是 "

		//GET > add all 或 remove all > PUT > remove key

		//GET <<<<<<<<<<<<<<<<<<<<<<<<<
		JSONObject rq = new JSONObject();
		rq.put(JSONRequest.KEY_ID, request.get(JSONRequest.KEY_ID));
		rq.put(JSONRequest.KEY_COLUMN, realKey);
		JSONObject rp = parseResponse(RequestMethod.GET, table, null, rq, null, false);
		//GET >>>>>>>>>>>>>>>>>>>>>>>>>


		//add all 或 remove all <<<<<<<<<<<<<<<<<<<<<<<<<
		JSONArray targetArray = rp == null ? null : rp.getJSONArray(realKey);
		if (targetArray == null) {
			targetArray = new JSONArray();
		}
		for (Object obj : array) {
			if (obj == null) {
				continue;
			}
			if (putType == 1) {
				if (targetArray.contains(obj)) {
					throw new ConflictException("PUT " + path + ", " + realKey + ":" + obj + " 已存在！");
				}
				targetArray.add(obj);
			} else if (putType == 2) {
				if (targetArray.contains(obj) == false) {
					throw new NullPointerException("PUT " + path + ", " + realKey + ":" + obj + " 不存在！");
				}
				targetArray.remove(obj);
			}
		}

		//add all 或 remove all >>>>>>>>>>>>>>>>>>>>>>>>>

		//PUT <<<<<<<<<<<<<<<<<<<<<<<<<
		sqlRequest.put(realKey, targetArray);
		//PUT >>>>>>>>>>>>>>>>>>>>>>>>>

	}


	@Override
	public void onTableArrayParse(String key, JSONArray value) throws Exception {
		String childKey = key.substring(0, key.length() - JSONRequest.KEY_ARRAY.length());
		JSONArray valueArray = (JSONArray) value;

		int allCount = 0;
		JSONArray ids = new JSONArray();

		int version = parser.getVersion();
		int maxUpdateCount = parser.getMaxUpdateCount();

		String idKey = parser.createSQLConfig().getIdKey(); //Table[]: [{}] arrayConfig 为 null
		for (int i = 0; i < valueArray.size(); i++) { //只要有一条失败，则抛出异常，全部失败
			//TODO 改成一条多 VALUES 的 SQL 性能更高，报错也更会更好处理，更人性化
			JSONObject item;
			try {
				item = valueArray.getJSONObject(i);
			}
			catch (Exception e) {
				throw new UnsupportedDataTypeException("批量新增/修改失败！" + key + "/" + i + ":value 中value不合法！类型必须是 OBJECT ，结构为 {} !");
			}
			JSONRequest req = new JSONRequest(childKey, item);

			//parser.getMaxSQLCount() ? 可能恶意调用接口，把数据库拖死
			JSONObject result = (JSONObject) onChildParse(0, "" + i, parser.parseCorrectRequest(method, childKey, version, "", req, maxUpdateCount, parser));
			result = result.getJSONObject(childKey);
			//
			boolean success = JSONResponse.isSuccess(result);
			int count = result == null ? null : result.getIntValue(JSONResponse.KEY_COUNT);

			if (success == false || count != 1) { //如果 code = 200 但 count != 1，不能算成功，掩盖了错误为不好排查问题
				throw new ServerException("批量新增/修改失败！" + key + "/" +  i + "：" + (success ? "成功但 count != 1 ！" : (result == null ? "null" : result.getString(JSONResponse.KEY_MSG))));
			}

			allCount += count;
			ids.add(result.get(idKey));
		}

		JSONObject allResult = AbstractParser.newSuccessResult();
		allResult.put(JSONResponse.KEY_COUNT, allCount);
		allResult.put(idKey + "[]", ids);

		response.put(key, allResult); //不按原样返回，避免数据量过大
	}


	@Override
	public JSONObject parseResponse(RequestMethod method, String table, String alias, JSONObject request, List<Join> joinList, boolean isProcedure) throws Exception {
		SQLConfig config = newSQLConfig(method, table, alias, request, joinList, isProcedure);
		return parseResponse(config, isProcedure);
	}
	@Override
	public JSONObject parseResponse(SQLConfig config, boolean isProcedure) throws Exception {
		if (parser.getSQLExecutor() == null) {
			parser.createSQLExecutor();
		}
		return parser.getSQLExecutor().execute(config, isProcedure);
	}


	@Override
	public SQLConfig newSQLConfig(boolean isProcedure) throws Exception {
		return newSQLConfig(method, table, alias, sqlRequest, joinList, isProcedure);
	}

	/**SQL 配置，for single object
	 * @return {@link #setSQLConfig(int, int, int)}
	 * @throws Exception
	 */
	@Override
	public AbstractObjectParser setSQLConfig() throws Exception {
		return setSQLConfig(1, 0, 0);
	}

	@Override
	public AbstractObjectParser setSQLConfig(int count, int page, int position) throws Exception {
		if (isTable == false) {
			return this;
		}

		if (sqlConfig == null) {
			try {
				sqlConfig = newSQLConfig(false);
			}
			catch (NotExistException e) {
				e.printStackTrace();
				return this;
			}
		}
		sqlConfig.setCount(count).setPage(page).setPosition(position);

		parser.onVerifyRole(sqlConfig);

		return this;
	}




	protected SQLConfig sqlConfig = null;//array item复用
	/**SQL查询，for array item
	 * @param count
	 * @param page
	 * @param position
	 * @return this
	 * @throws Exception
	 */
	@Override
	public AbstractObjectParser executeSQL() throws Exception {
		//执行SQL操作数据库
		if (isTable == false) {//提高性能
			sqlReponse = new JSONObject(sqlRequest);
		} else {
			try {
				sqlReponse = onSQLExecute();
			}
			catch (NotExistException e) {
				//				Log.e(TAG, "getObject  try { response = getSQLObject(config2); } catch (Exception e) {");
				//				if (e instanceof NotExistException) {//非严重异常，有时候只是数据不存在
				//					//						e.printStackTrace();
				sqlReponse = null;//内部吃掉异常，put到最外层
				//						requestObject.put(JSONResponse.KEY_MSG
				//								, StringUtil.getString(requestObject.get(JSONResponse.KEY_MSG)
				//										+ "; query " + path + " cath NotExistException:"
				//										+ newErrorResult(e).getString(JSONResponse.KEY_MSG)));
				//				} else {
				//					throw e;
				//				}
			}

			if (drop) {//丢弃Table，只为了向下提供条件
				sqlReponse = null;
			}
		}

		return this;
	}

	/**
	 * @return response
	 * @throws Exception
	 */
	@Override
	public JSONObject response() throws Exception {
		if (sqlReponse == null || sqlReponse.isEmpty()) {
			if (isTable) {//Table自身都获取不到值，则里面的Child都无意义，不需要再解析
				return response;
			}
		} else {
			response.putAll(sqlReponse);
		}


		//把isTable时取出去的custom重新添加回来
		if (customMap != null) {
			response.putAll(customMap);
		}


		onFunctionResponse("0");

		onChildResponse();

		onFunctionResponse("+");

		onComplete();

		return response;
	}


	@Override
	public void onFunctionResponse(String type) throws Exception {
		Map<String, String> map = functionMap == null ? null : functionMap.get(type);

		//解析函数function
		Set<Entry<String, String>> functionSet = map == null ? null : map.entrySet();
		if (functionSet != null && functionSet.isEmpty() == false) {
			//			JSONObject json = "-".equals(type) ? request : response; // key-():function 是实时执行，而不是在这里批量执行

			for (Entry<String, String> entry : functionSet) {

				//				parseFunction(json, entry.getKey(), entry.getValue());
				parseFunction(entry.getKey(), entry.getValue(), parentPath, name, response);
			}
		}
	}

	public void parseFunction(String key, String value, String parentPath, String currentName, JSONObject currentObject) throws Exception {
		Object result;
		if (key.startsWith("@")) { //TODO 以后这种小众功能从 ORM 移出，作为一个 plugin/APIJSONProcedure
			FunctionBean fb = AbstractFunctionParser.parseFunction(value, currentObject, true);

			SQLConfig config = newSQLConfig(true);
			config.setProcedure(fb.toFunctionCallString(true));
			result = parseResponse(config, true);
		}
		else {
			result = parser.onFunctionParse(key, value, parentPath, currentName, currentObject);
		}

		if (result != null) {
			String k = AbstractSQLConfig.getRealKey(method, key, false, false, "`"); //FIXME PG 是 "

			response.put(k, result);
			parser.putQueryResult(AbstractParser.getAbsPath(path, k), result);
		}
	}

	@Override
	public void onChildResponse() throws Exception {
		//把isTable时取出去child解析后重新添加回来
		Set<Entry<String, JSONObject>> set = childMap == null ? null : childMap.entrySet();
		if (set != null) {
			int index = 0;
			for (Entry<String, JSONObject> entry : set) {
				if (entry != null) {
					response.put(entry.getKey(), onChildParse(index, entry.getKey(), entry.getValue()));
					index ++;
				}
			}
		}
	}



	@Override
	public Object onReferenceParse(@NotNull String path) {
		return parser.getValueByPath(path);
	}

	@Override
	public JSONObject onSQLExecute() throws Exception {
		JSONObject result = parser.executeSQL(sqlConfig, isSubquery);
		if (isSubquery == false && result != null) {
			parser.putQueryResult(path, result);//解决获取关联数据时requestObject里不存在需要的关联数据
		}
		return result;
	}


	/**
	 * response has the final value after parse (and query if isTable)
	 */
	@Override
	public void onComplete() {
	}


	/**回收内存
	 */
	@Override
	public void recycle() {
		//后面还可能用到，要还原
		if (tri) {//避免返回未传的字段
			request.put(KEY_TRY, tri);
		}
		if (drop) {
			request.put(KEY_DROP, drop);
		}


		method = null;
		parentPath = null;
		arrayConfig = null;

		//		if (response != null) {
		//			response.clear();//有效果?
		//			response = null;
		//		}

		request = null;
		response = null;
		sqlRequest = null;
		sqlReponse = null;

		functionMap = null;
		customMap = null;
		childMap = null;
	}






	protected RequestMethod method;
	@Override
	public AbstractObjectParser setMethod(RequestMethod method) {
		if (this.method != method) {
			this.method = method;
			sqlConfig = null;
			//TODO ?			sqlReponse = null;
		}
		return this;
	}
	@Override
	public RequestMethod getMethod() {
		return method;
	}




	@Override
	public boolean isTable() {
		return isTable;
	}
	@Override
	public String getPath() {
		return path;
	}
	@Override
	public String getTable() {
		return table;
	}
	@Override
	public String getAlias() {
		return alias;
	}
	@Override
	public SQLConfig getArrayConfig() {
		return arrayConfig;
	}


	@Override
	public SQLConfig getSQLConfig() {
		return sqlConfig;
	}

	@Override
	public JSONObject getResponse() {
		return response;
	}
	@Override
	public JSONObject getSqlRequest() {
		return sqlRequest;
	}
	@Override
	public JSONObject getSqlReponse() {
		return sqlReponse;
	}

	@Override
	public Map<String, Object> getCustomMap() {
		return customMap;
	}
	@Override
	public Map<String, Map<String, String>> getFunctionMap() {
		return functionMap;
	}
	@Override
	public Map<String, JSONObject> getChildMap() {
		return childMap;
	}


}