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AbstractParser.java
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/*Copyright (C) 2020 THL A29 Limited, a Tencent company. All rights reserved.
This source code is licensed under the Apache License Version 2.0.*/
package apijson.orm;
import static apijson.JSONObject.KEY_EXPLAIN;
import static apijson.RequestMethod.GET;
import java.io.UnsupportedEncodingException;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Savepoint;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.TimeoutException;
import javax.activation.UnsupportedDataTypeException;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import apijson.JSON;
import apijson.JSONResponse;
import apijson.Log;
import apijson.NotNull;
import apijson.RequestMethod;
import apijson.RequestRole;
import apijson.StringUtil;
import apijson.orm.exception.ConditionErrorException;
import apijson.orm.exception.ConflictException;
import apijson.orm.exception.NotExistException;
import apijson.orm.exception.NotLoggedInException;
import apijson.orm.exception.OutOfRangeException;
/**parser for parsing request to JSONObject
* @author Lemon
*/
public abstract class AbstractParser<T> implements Parser<T>, ParserCreator<T>, VerifierCreator<T>, SQLCreator {
protected static final String TAG = "AbstractParser";
/**
* method = null
*/
public AbstractParser() {
this(null);
}
/**needVerify = true
* @param requestMethod null ? requestMethod = GET
*/
public AbstractParser(RequestMethod method) {
this(method, true);
}
/**
* @param requestMethod null ? requestMethod = GET
* @param needVerify 仅限于为服务端提供方法免验证特权，普通请求不要设置为 false ！ 如果对应Table有权限也建议用默认值 true，保持和客户端权限一致
*/
public AbstractParser(RequestMethod method, boolean needVerify) {
super();
setMethod(method);
setNeedVerify(needVerify);
}
@NotNull
protected Visitor<T> visitor;
@NotNull
@Override
public Visitor<T> getVisitor() {
if (visitor == null) {
visitor = new Visitor<T>() {
@Override
public T getId() {
return null;
}
@Override
public List<T> getContactIdList() {
return null;
}
};
}
return visitor;
}
@Override
public AbstractParser<T> setVisitor(@NotNull Visitor<T> visitor) {
this.visitor = visitor;
return this;
}
protected RequestMethod requestMethod;
@NotNull
@Override
public RequestMethod getMethod() {
return requestMethod;
}
@NotNull
@Override
public AbstractParser<T> setMethod(RequestMethod method) {
this.requestMethod = method == null ? GET : method;
this.transactionIsolation = RequestMethod.isQueryMethod(method) ? Connection.TRANSACTION_NONE : Connection.TRANSACTION_REPEATABLE_READ;
return this;
}
protected int version;
@Override
public int getVersion() {
return version;
}
@Override
public AbstractParser<T> setVersion(int version) {
this.version = version;
return this;
}
protected String tag;
@Override
public String getTag() {
return tag;
}
@Override
public AbstractParser<T> setTag(String tag) {
this.tag = tag;
return this;
}
protected JSONObject requestObject;
@Override
public JSONObject getRequest() {
return requestObject;
}
@Override
public AbstractParser<T> setRequest(JSONObject request) {
this.requestObject = request;
return this;
}
protected Boolean globleFormat;
public AbstractParser<T> setGlobleFormat(Boolean globleFormat) {
this.globleFormat = globleFormat;
return this;
}
@Override
public Boolean getGlobleFormat() {
return globleFormat;
}
protected RequestRole globleRole;
public AbstractParser<T> setGlobleRole(RequestRole globleRole) {
this.globleRole = globleRole;
return this;
}
@Override
public RequestRole getGlobleRole() {
return globleRole;
}
protected String globleDatabase;
public AbstractParser<T> setGlobleDatabase(String globleDatabase) {
this.globleDatabase = globleDatabase;
return this;
}
@Override
public String getGlobleDatabase() {
return globleDatabase;
}
protected String globleSchema;
public AbstractParser<T> setGlobleSchema(String globleSchema) {
this.globleSchema = globleSchema;
return this;
}
@Override
public String getGlobleSchema() {
return globleSchema;
}
protected Boolean globleExplain;
public AbstractParser<T> setGlobleExplain(Boolean globleExplain) {
this.globleExplain = globleExplain;
return this;
}
@Override
public Boolean getGlobleExplain() {
return globleExplain;
}
protected String globleCache;
public AbstractParser<T> setGlobleCache(String globleCache) {
this.globleCache = globleCache;
return this;
}
@Override
public String getGlobleCache() {
return globleCache;
}
@Override
public AbstractParser<T> setNeedVerify(boolean needVerify) {
setNeedVerifyLogin(needVerify);
setNeedVerifyRole(needVerify);
setNeedVerifyContent(needVerify);
return this;
}
protected boolean needVerifyLogin;
@Override
public boolean isNeedVerifyLogin() {
return needVerifyLogin;
}
@Override
public AbstractParser<T> setNeedVerifyLogin(boolean needVerifyLogin) {
this.needVerifyLogin = needVerifyLogin;
return this;
}
protected boolean needVerifyRole;
@Override
public boolean isNeedVerifyRole() {
return needVerifyRole;
}
@Override
public AbstractParser<T> setNeedVerifyRole(boolean needVerifyRole) {
this.needVerifyRole = needVerifyRole;
return this;
}
protected boolean needVerifyContent;
@Override
public boolean isNeedVerifyContent() {
return needVerifyContent;
}
@Override
public AbstractParser<T> setNeedVerifyContent(boolean needVerifyContent) {
this.needVerifyContent = needVerifyContent;
return this;
}
protected SQLExecutor sqlExecutor;
protected Verifier<T> verifier;
protected Map<String, Object> queryResultMap;//path-result
@Override
public SQLExecutor getSQLExecutor() {
if (sqlExecutor == null) {
sqlExecutor = createSQLExecutor();
}
return sqlExecutor;
}
@Override
public Verifier<T> getVerifier() {
if (verifier == null) {
verifier = createVerifier().setVisitor(getVisitor());
}
return verifier;
}
/**解析请求json并获取对应结果
* @param request
* @return
*/
@Override
public String parse(String request) {
return JSON.toJSONString(parseResponse(request));
}
/**解析请求json并获取对应结果
* @param request
* @return
*/
@NotNull
@Override
public String parse(JSONObject request) {
return JSON.toJSONString(parseResponse(request));
}
/**解析请求json并获取对应结果
* @param request 先parseRequest中URLDecoder.decode(request, UTF_8);再parseResponse(getCorrectRequest(...))
* @return parseResponse(requestObject);
*/
@NotNull
@Override
public JSONObject parseResponse(String request) {
Log.d(TAG, "\n\n\n\n<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n"
+ requestMethod + "/parseResponse request = \n" + request + "\n\n");
try {
requestObject = parseRequest(request);
} catch (Exception e) {
return newErrorResult(e);
}
return parseResponse(requestObject);
}
private int queryDepth;
/**解析请求json并获取对应结果
* @param request
* @return requestObject
*/
@NotNull
@Override
public JSONObject parseResponse(JSONObject request) {
long startTime = System.currentTimeMillis();
Log.d(TAG, "parseResponse startTime = " + startTime
+ "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n\n\n ");
requestObject = request;
verifier = createVerifier().setVisitor(getVisitor());
if (RequestMethod.isPublicMethod(requestMethod) == false) {
try {
if (isNeedVerifyLogin()) {
onVerifyLogin();
}
if (isNeedVerifyContent()) {
onVerifyContent();
}
} catch (Exception e) {
return extendErrorResult(requestObject, e);
}
}
//必须在parseCorrectRequest后面，因为parseCorrectRequest可能会添加 @role
if (isNeedVerifyRole() && globleRole == null) {
try {
setGlobleRole(RequestRole.get(requestObject.getString(JSONRequest.KEY_ROLE)));
requestObject.remove(JSONRequest.KEY_ROLE);
} catch (Exception e) {
return extendErrorResult(requestObject, e);
}
}
try {
setGlobleFormat(requestObject.getBoolean(JSONRequest.KEY_FORMAT));
setGlobleDatabase(requestObject.getString(JSONRequest.KEY_DATABASE));
setGlobleSchema(requestObject.getString(JSONRequest.KEY_SCHEMA));
setGlobleExplain(requestObject.getBoolean(JSONRequest.KEY_EXPLAIN));
setGlobleCache(requestObject.getString(JSONRequest.KEY_CACHE));
requestObject.remove(JSONRequest.KEY_FORMAT);
requestObject.remove(JSONRequest.KEY_DATABASE);
requestObject.remove(JSONRequest.KEY_SCHEMA);
requestObject.remove(JSONRequest.KEY_EXPLAIN);
requestObject.remove(JSONRequest.KEY_CACHE);
} catch (Exception e) {
return extendErrorResult(requestObject, e);
}
final String requestString = JSON.toJSONString(request);//request传进去解析后已经变了
queryResultMap = new HashMap<String, Object>();
Exception error = null;
sqlExecutor = createSQLExecutor();
onBegin();
try {
queryDepth = 0;
requestObject = onObjectParse(request, null, null, null, false);
onCommit();
}
catch (Exception e) {
e.printStackTrace();
error = e;
onRollback();
}
requestObject = error == null ? extendSuccessResult(requestObject) : extendErrorResult(requestObject, error);
JSONObject res = (globleFormat != null && globleFormat) && JSONResponse.isSuccess(requestObject) ? new JSONResponse(requestObject) : requestObject;
long endTime = System.currentTimeMillis();
long duration = endTime - startTime;
if (Log.DEBUG) { //用 | 替代 /，避免 APIJSON ORM，APIAuto 等解析路径错误
requestObject.put("sql:generate|cache|execute|maxExecute", getSQLExecutor().getGeneratedSQLCount() + "|" + getSQLExecutor().getCachedSQLCount() + "|" + getSQLExecutor().getExecutedSQLCount() + "|" + getMaxSQLCount());
requestObject.put("depth:count|max", queryDepth + "|" + getMaxQueryDepth());
requestObject.put("time:start|duration|end", startTime + "|" + duration + "|" + endTime);
if (error != null) {
requestObject.put("throw", error.getClass().getName());
requestObject.put("trace", error.getStackTrace());
}
}
onClose();
//会不会导致原来的session = null？ session = null;
if (Log.DEBUG) {
Log.d(TAG, "\n\n\n\n<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n "
+ requestMethod + "/parseResponse request = \n" + requestString + "\n\n");
Log.d(TAG, "parseResponse return response = \n" + JSON.toJSONString(requestObject)
+ "\n >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> \n\n\n");
}
Log.d(TAG, "parseResponse endTime = " + endTime + "; duration = " + duration
+ ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n\n\n");
return res;
}
@Override
public void onVerifyLogin() throws Exception {
getVerifier().verifyLogin();
}
@Override
public void onVerifyContent() throws Exception {
requestObject = parseCorrectRequest();
}
/**校验角色及对应操作的权限
* @param config
* @return
* @throws Exception
*/
@Override
public void onVerifyRole(@NotNull SQLConfig config) throws Exception {
if (Log.DEBUG) {
Log.i(TAG, "onVerifyRole config = " + JSON.toJSONString(config));
}
if (isNeedVerifyRole()) {
if (config.getRole() == null) {
if (globleRole != null) {
config.setRole(globleRole);
} else {
config.setRole(getVisitor().getId() == null ? RequestRole.UNKNOWN : RequestRole.LOGIN);
}
}
getVerifier().verifyAccess(config);
}
}
/**解析请求JSONObject
* @param request => URLDecoder.decode(request, UTF_8);
* @return
* @throws Exception
*/
@NotNull
public static JSONObject parseRequest(String request) throws Exception {
JSONObject obj = JSON.parseObject(request);
if (obj == null) {
throw new UnsupportedEncodingException("JSON格式不合法！");
}
return obj;
}
@Override
public JSONObject parseCorrectRequest(RequestMethod method, String tag, int version, String name, @NotNull JSONObject request
, int maxUpdateCount, SQLCreator creator) throws Exception {
if (RequestMethod.isPublicMethod(method)) {
return request;//需要指定JSON结构的get请求可以改为post请求。一般只有对安全性要求高的才会指定，而这种情况用明文的GET方式几乎肯定不安全
}
if (StringUtil.isEmpty(tag, true)) {
throw new IllegalArgumentException("请在最外层传 tag ！一般是 Table 名，例如 \"tag\": \"User\" ");
}
//获取指定的JSON结构 <<<<<<<<<<<<
JSONObject object = null;
String error = "";
try {
object = getStructure("Request", method.name(), tag, version);
} catch (Exception e) {
error = e.getMessage();
}
if (object == null) { //empty表示随意操作 || object.isEmpty()) {
throw new UnsupportedOperationException("找不到 version: " + version + ", method: " + method.name() + ", tag: " + tag + " 对应的 structure ！"
+ "非开放请求必须是后端 Request 表中校验规则允许的操作！\n " + error + "\n如果需要则在 Request 表中新增配置！");
}
JSONObject target = object;
if (object.containsKey(tag) == false) { //tag 是 Table 名或 Table[]
boolean isArrayKey = tag.endsWith(":[]"); // JSONRequest.isArrayKey(tag);
String key = isArrayKey ? tag.substring(0, tag.length() - 3) : tag;
if (apijson.JSONObject.isTableKey(key)) {
if (isArrayKey) { //自动为 tag = Comment:[] 的 { ... } 新增键值对 "Comment[]":[] 为 { "Comment[]":[], ... }
target.put(key + "[]", new JSONArray());
}
else { //自动为 tag = Comment 的 { ... } 包一层为 { "Comment": { ... } }
target = new JSONObject(true);
target.put(tag, object);
}
}
}
//获取指定的JSON结构 >>>>>>>>>>>>>>
//JSONObject clone 浅拷贝没用，Structure.parse 会导致 structure 里面被清空，第二次从缓存里取到的就是 {}
return getVerifier().verifyRequest(method, name, target, request, maxUpdateCount, getGlobleDatabase(), getGlobleSchema(), creator);
}
/**新建带状态内容的JSONObject
* @param code
* @param msg
* @return
*/
public static JSONObject newResult(int code, String msg) {
return extendResult(null, code, msg);
}
/**添加JSONObject的状态内容，一般用于错误提示结果
* @param object
* @param code
* @param msg
* @return
*/
public static JSONObject extendResult(JSONObject object, int code, String msg) {
if (object == null) {
object = new JSONObject(true);
}
if (object.containsKey(JSONResponse.KEY_OK) == false) {
object.put(JSONResponse.KEY_OK, JSONResponse.isSuccess(code));
}
if (object.containsKey(JSONResponse.KEY_CODE) == false) {
object.put(JSONResponse.KEY_CODE, code);
}
String m = StringUtil.getString(object.getString(JSONResponse.KEY_MSG));
if (m.isEmpty() == false) {
msg = m + " ;\n " + StringUtil.getString(msg);
}
object.put(JSONResponse.KEY_MSG, msg);
return object;
}
/**添加请求成功的状态内容
* @param object
* @return
*/
public static JSONObject extendSuccessResult(JSONObject object) {
return extendResult(object, JSONResponse.CODE_SUCCESS, JSONResponse.MSG_SUCCEED);
}
/**获取请求成功的状态内容
* @return
*/
public static JSONObject newSuccessResult() {
return newResult(JSONResponse.CODE_SUCCESS, JSONResponse.MSG_SUCCEED);
}
/**添加请求成功的状态内容
* @param object
* @return
*/
public static JSONObject extendErrorResult(JSONObject object, Exception e) {
JSONObject error = newErrorResult(e);
return extendResult(object, error.getIntValue(JSONResponse.KEY_CODE), error.getString(JSONResponse.KEY_MSG));
}
/**新建错误状态内容
* @param e
* @return
*/
public static JSONObject newErrorResult(Exception e) {
if (e != null) {
e.printStackTrace();
int code;
if (e instanceof UnsupportedEncodingException) {
code = JSONResponse.CODE_UNSUPPORTED_ENCODING;
}
else if (e instanceof IllegalAccessException) {
code = JSONResponse.CODE_ILLEGAL_ACCESS;
}
else if (e instanceof UnsupportedOperationException) {
code = JSONResponse.CODE_UNSUPPORTED_OPERATION;
}
else if (e instanceof NotExistException) {
code = JSONResponse.CODE_NOT_FOUND;
}
else if (e instanceof IllegalArgumentException) {
code = JSONResponse.CODE_ILLEGAL_ARGUMENT;
}
else if (e instanceof NotLoggedInException) {
code = JSONResponse.CODE_NOT_LOGGED_IN;
}
else if (e instanceof TimeoutException) {
code = JSONResponse.CODE_TIME_OUT;
}
else if (e instanceof ConflictException) {
code = JSONResponse.CODE_CONFLICT;
}
else if (e instanceof ConditionErrorException) {
code = JSONResponse.CODE_CONDITION_ERROR;
}
else if (e instanceof UnsupportedDataTypeException) {
code = JSONResponse.CODE_UNSUPPORTED_TYPE;
}
else if (e instanceof OutOfRangeException) {
code = JSONResponse.CODE_OUT_OF_RANGE;
}
else if (e instanceof NullPointerException) {
code = JSONResponse.CODE_NULL_POINTER;
}
else {
code = JSONResponse.CODE_SERVER_ERROR;
}
return newResult(code, e.getMessage());
}
return newResult(JSONResponse.CODE_SERVER_ERROR, JSONResponse.MSG_SERVER_ERROR);
}
//TODO 启动时一次性加载Request所有内容，作为初始化。
/**获取正确的请求，非GET请求必须是服务器指定的
* @param method
* @param request
* @return
* @throws Exception
*/
@Override
public JSONObject parseCorrectRequest() throws Exception {
setTag(requestObject.getString(JSONRequest.KEY_TAG));
setVersion(requestObject.getIntValue(JSONRequest.KEY_VERSION));
requestObject.remove(JSONRequest.KEY_TAG);
requestObject.remove(JSONRequest.KEY_VERSION);
return parseCorrectRequest(requestMethod, tag, version, "", requestObject, getMaxUpdateCount(), this);
}
//TODO 优化性能！
/**获取正确的返回结果
* @param method
* @param response
* @return
* @throws Exception
*/
@Override
public JSONObject parseCorrectResponse(String table, JSONObject response) throws Exception {
// Log.d(TAG, "getCorrectResponse method = " + method + "; table = " + table);
// if (response == null || response.isEmpty()) {//避免无效空result:{}添加内容后变有效
// Log.e(TAG, "getCorrectResponse response == null || response.isEmpty() >> return response;");
return response;
// }
//
// JSONObject target = apijson.JSONObject.isTableKey(table) == false
// ? new JSONObject() : getStructure(method, "Response", "model", table);
//
// return MethodStructure.parseResponse(method, table, target, response, new OnParseCallback() {
//
// @Override
// protected JSONObject onParseJSONObject(String key, JSONObject tobj, JSONObject robj) throws Exception {
// return getCorrectResponse(method, key, robj);
// }
// });
}
/**获取Request或Response内指定JSON结构
* @param table
* @param method
* @param tag
* @param version
* @return
* @throws Exception
*/
@Override
public JSONObject getStructure(@NotNull String table, String method, String tag, int version) throws Exception {
// TODO 目前只使用 Request 而不使用 Response，所以这里写死用 REQUEST_MAP，以后可能 Response 表也会与 Request 表合并，用字段来区分
String cacheKey = AbstractVerifier.getCacheKeyForRequest(method, tag);
SortedMap<Integer, JSONObject> versionedMap = AbstractVerifier.REQUEST_MAP.get(cacheKey);
JSONObject result = versionedMap == null ? null : versionedMap.get(Integer.valueOf(version));
if (result == null) { // version <= 0 时使用最新，version > 0 时使用 > version 的最接近版本（最小版本）
Set<Entry<Integer, JSONObject>> set = versionedMap == null ? null : versionedMap.entrySet();
if (set != null && set.isEmpty() == false) {
Entry<Integer, JSONObject> maxEntry = null;
for (Entry<Integer, JSONObject> entry : set) {
if (entry == null || entry.getKey() == null || entry.getValue() == null) {
continue;
}
if (version <= 0 || version == entry.getKey()) { // 这里应该不会出现相等，因为上面 versionedMap.get(Integer.valueOf(version))
maxEntry = entry;
break;
}
if (entry.getKey() < version) {
break;
}
maxEntry = entry;
}
result = maxEntry == null ? null : maxEntry.getValue();
}
if (result != null) { // 加快下次查询，查到值的话组合情况其实是有限的，不属于恶意请求
if (versionedMap == null) {
versionedMap = new TreeMap<>((o1, o2) -> {
return o2 == null ? -1 : o2.compareTo(o1); // 降序
});
}
versionedMap.put(Integer.valueOf(version), result);
AbstractVerifier.REQUEST_MAP.put(cacheKey, versionedMap);
}
}
if (result == null) {
if (AbstractVerifier.REQUEST_MAP.isEmpty() == false) {
return null; // 已使用 REQUEST_MAP 缓存全部，但没查到
}
//获取指定的JSON结构 <<<<<<<<<<<<<<
SQLConfig config = createSQLConfig().setMethod(GET).setTable(table);
config.setPrepared(false);
config.setColumn(Arrays.asList("structure"));
Map<String, Object> where = new HashMap<String, Object>();
where.put("method", method);
where.put(JSONRequest.KEY_TAG, tag);
if (version > 0) {
where.put(JSONRequest.KEY_VERSION + "{}", ">=" + version);
}
config.setWhere(where);
config.setOrder(JSONRequest.KEY_VERSION + (version > 0 ? "+" : "-"));
config.setCount(1);
//too many connections error: 不try-catch，可以让客户端看到是服务器内部异常
result = getSQLExecutor().execute(config, false);
// version, method, tag 组合情况太多了，JDK 里又没有 LRUCache，所以要么启动时一次性缓存全部后面只用缓存，要么每次都查数据库
// versionedMap.put(Integer.valueOf(version), result);
// AbstractVerifier.REQUEST_MAP.put(cacheKey, versionedMap);
}
return getJSONObject(result, "structure"); //解决返回值套了一层 "structure":{}
}
// protected SQLConfig itemConfig;
/**获取单个对象，该对象处于parentObject内
* @param parentPath parentObject的路径
* @param name parentObject的key
* @param request parentObject的value
* @param config for array item
* @return
* @throws Exception
*/
@Override
public JSONObject onObjectParse(final JSONObject request
, String parentPath, String name, final SQLConfig arrayConfig, boolean isSubquery) throws Exception {
if (Log.DEBUG) {
Log.i(TAG, "\ngetObject: parentPath = " + parentPath
+ ";\n name = " + name + "; request = " + JSON.toJSONString(request));
}
if (request == null) {// Moment:{} || request.isEmpty()) {//key-value条件
return null;
}
int type = arrayConfig == null ? 0 : arrayConfig.getType();
String[] arr = StringUtil.split(parentPath, "/");
if (arrayConfig == null || arrayConfig.getPosition() == 0) {
int d = arr == null ? 1 : arr.length + 1;
if (queryDepth < d) {
queryDepth = d;
int maxQueryDepth = getMaxQueryDepth();
if (queryDepth > maxQueryDepth) {
throw new IllegalArgumentException(parentPath + "/" + name + ":{} 的深度(或者说层级) 为 " + queryDepth + " 已超限，必须在 1-" + maxQueryDepth + " 内 !");
}
}
}
ObjectParser op = createObjectParser(request, parentPath, name, arrayConfig, isSubquery).parse();
JSONObject response = null;
if (op != null) {//TODO SQL查询结果为空时，functionMap和customMap还有没有意义？
if (arrayConfig == null) {//Common
response = op.setSQLConfig().executeSQL().response();
}
else {//Array Item Child
int query = arrayConfig.getQuery();
//total 这里不能用arrayConfig.getType()，因为在createObjectParser.onChildParse传到onObjectParse时已被改掉
if (type == SQLConfig.TYPE_ITEM_CHILD_0 && query != JSONRequest.QUERY_TABLE
&& arrayConfig.getPosition() == 0) {
JSONObject rp = op.setMethod(RequestMethod.HEAD).setSQLConfig().executeSQL().getSqlReponse();
if (rp != null) {
int index = parentPath.lastIndexOf("]/");
if (index >= 0) {
int total = rp.getIntValue(JSONResponse.KEY_COUNT);
String pathPrefix = parentPath.substring(0, index) + "]/";
putQueryResult(pathPrefix + JSONResponse.KEY_TOTAL, total);
//详细的分页信息，主要为 PC 端提供
int count = arrayConfig.getCount();
int page = arrayConfig.getPage();
int max = (int) ((total - 1)/count);
if (max < 0) {
max = 0;
}
JSONObject pagination = new JSONObject(true);
pagination.put(JSONResponse.KEY_TOTAL, total);
pagination.put(JSONRequest.KEY_COUNT, count);
pagination.put(JSONRequest.KEY_PAGE, page);
pagination.put(JSONResponse.KEY_MAX, max);
pagination.put(JSONResponse.KEY_MORE, page < max);
pagination.put(JSONResponse.KEY_FIRST, page == 0);
pagination.put(JSONResponse.KEY_LAST, page == max);
putQueryResult(pathPrefix + JSONResponse.KEY_INFO, pagination);
if (total <= count*page) {
query = JSONRequest.QUERY_TOTAL;//数量不够了，不再往后查询
}
}
}
op.setMethod(requestMethod);
}
//Table
if (query == JSONRequest.QUERY_TOTAL) {
response = null;//不再往后查询
} else {
response = op
.setSQLConfig(arrayConfig.getCount(), arrayConfig.getPage(), arrayConfig.getPosition())
.executeSQL()
.response();
// itemConfig = op.getConfig();
}
}
op.recycle();
op = null;
}
return response;
}
/**获取对象数组，该对象数组处于parentObject内
* @param parentPath parentObject的路径
* @param name parentObject的key
* @param request parentObject的value
* @return
* @throws Exception
*/
@Override
public JSONArray onArrayParse(JSONObject request, String parentPath, String name, boolean isSubquery) throws Exception {
if (Log.DEBUG) {
Log.i(TAG, "\n\n\n onArrayParse parentPath = " + parentPath
+ "; name = " + name + "; request = " + JSON.toJSONString(request));
}
//不能允许GETS，否则会被通过"[]":{"@role":"ADMIN"},"Table":{},"tag":"Table"绕过权限并能批量查询
if (isSubquery == false && RequestMethod.isGetMethod(requestMethod, false) == false) {
throw new UnsupportedOperationException("key[]:{}只支持GET方法！不允许传 " + name + ":{} ！");
}
if (request == null || request.isEmpty()) {//jsonKey-jsonValue条件
return null;
}
String path = getAbsPath(parentPath, name);
//不能改变，因为后面可能继续用到，导致1以上都改变 []:{0:{Comment[]:{0:{Comment:{}},1:{...},...}},1:{...},...}
final String query = request.getString(JSONRequest.KEY_QUERY);
final Integer count = request.getInteger(JSONRequest.KEY_COUNT); //TODO 如果不想用默认数量可以改成 getIntValue(JSONRequest.KEY_COUNT);
final int page = request.getIntValue(JSONRequest.KEY_PAGE);
final Object join = request.get(JSONRequest.KEY_JOIN);
int query2;
if (query == null) {
query2 = JSONRequest.QUERY_TABLE;
}
else {
switch (query) {
case "0":
case JSONRequest.QUERY_TABLE_STRING:
query2 = JSONRequest.QUERY_TABLE;
break;
case "1":
case JSONRequest.QUERY_TOTAL_STRING:
query2 = JSONRequest.QUERY_TOTAL;
break;
case "2":
case JSONRequest.QUERY_ALL_STRING:
query2 = JSONRequest.QUERY_ALL;
break;
default:
throw new IllegalArgumentException(path + "/" + JSONRequest.KEY_QUERY + ":value 中 value 的值不合法！必须在 [0,1,2] 或 [TABLE, TOTAL, ALL] 内 !");
}
}
int maxPage = getMaxQueryPage();
if (page < 0 || page > maxPage) {
throw new IllegalArgumentException(path + "/" + JSONRequest.KEY_PAGE + ":value 中 value 的值不合法！必须在 0-" + maxPage + " 内 !");
}
//不用total限制数量了，只用中断机制，total只在query = 1,2的时候才获取
int count2 = isSubquery || count != null ? (count == null ? 0 : count) : getDefaultQueryCount();
int max = isSubquery ? count2 : getMaxQueryCount();
if (count2 < 0 || count2 > max) {
throw new IllegalArgumentException(path + "/" + JSONRequest.KEY_COUNT + ":value 中 value 的值不合法！必须在 0-" + max + " 内 !");
}
request.remove(JSONRequest.KEY_QUERY);
request.remove(JSONRequest.KEY_COUNT);
request.remove(JSONRequest.KEY_PAGE);
request.remove(JSONRequest.KEY_JOIN);
Log.d(TAG, "onArrayParse query = " + query + "; count = " + count + "; page = " + page + "; join = " + join);
if (request.isEmpty()) {//如果条件成立，说明所有的 parentPath/name:request 中request都无效！！！
Log.e(TAG, "onArrayParse request.isEmpty() >> return null;");
return null;
}
int size = count2 == 0 ? max : count2;//count为每页数量，size为第page页实际数量，max(size) = count
Log.d(TAG, "onArrayParse size = " + size + "; page = " + page);
//key[]:{Table:{}}中key equals Table时 提取Table
int index = isSubquery || name == null ? -1 : name.lastIndexOf("[]");
String childPath = index <= 0 ? null : Pair.parseEntry(name.substring(0, index), true).getKey(); // Table-key1-key2...
//判断第一个key，即Table是否存在，如果存在就提取
String[] childKeys = StringUtil.split(childPath, "-", false);
if (childKeys == null || childKeys.length <= 0 || request.containsKey(childKeys[0]) == false) {
childKeys = null;
}
//Table<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
JSONArray response = new JSONArray();
SQLConfig config = createSQLConfig()
.setMethod(requestMethod)
.setCount(size)
.setPage(page)
.setQuery(query2)
.setJoinList(onJoinParse(join, request));
JSONObject parent;
//生成size个
for (int i = 0; i < (isSubquery ? 1 : size); i++) {
parent = onObjectParse(request, isSubquery ? parentPath : path, isSubquery ? name : "" + i, config.setType(SQLConfig.TYPE_ITEM).setPosition(i), isSubquery);
if (parent == null || parent.isEmpty()) {
break;
}
//key[]:{Table:{}}中key equals Table时 提取Table
response.add(getValue(parent, childKeys)); //null有意义
}
//Table>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
/*
* 支持引用取值后的数组
{
"User-id[]": {
"User": {
"contactIdList<>": 82002
}
},
"Moment-userId[]": {
"Moment": {
"userId{}@": "User-id[]"
}
}
}
*/
Object fo = childKeys == null || response.isEmpty() ? null : response.get(0);
if (fo instanceof Boolean || fo instanceof Number || fo instanceof String) { //[{}] 和 [[]] 都没意义
putQueryResult(path, response);
}
//后面还可能用到，要还原
request.put(JSONRequest.KEY_QUERY, query);
request.put(JSONRequest.KEY_COUNT, count);
request.put(JSONRequest.KEY_PAGE, page);
request.put(JSONRequest.KEY_JOIN, join);