ticatec-node-common-library/lib/db/SearchCriteria.js

A set of common classes for node express apps.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const StringUtils_1 = __importDefault(require("../StringUtils"));
const log4js_1 = __importDefault(require("log4js"));
const logger = log4js_1.default.getLogger('ticatec.common.SearchCriteria');
const DEFAULT_ROWS_PAGE = 25;
const FIRST_PAGE = 1;
class SearchCriteria {
    /**
     * 查询符合条件的记录数量
     * @param conn
     * @param sql
     * @param params
     * @private
     */
    queryCount(conn, sql, params) {
        return __awaiter(this, void 0, void 0, function* () {
            let result = yield conn.find(`select count(*) as cc from (${sql}) a`, params);
            return result == null ? 0 : parseInt(result['cc']);
        });
    }
    /**
     * 在将行记录转换成对象后的回调函数
     * @protected
     */
    getPostConstructor() {
        return null;
    }
    /**
     * 判断是否为空
     * @param s
     * @protected
     */
    isNotEmpty(s) {
        return !StringUtils_1.default.isEmpty(s);
    }
    /**
     * 封装like查询值
     * @param s
     * @protected
     */
    wrapLikeMatch(s) {
        return `%${s}%`;
    }
    getOrderClause() {
        return '';
    }
    /**
     * 执行查询语句，返回分页查询结果
     * @param conn
     * @param page
     * @param rowCount
     */
    paginationQuery(conn, page, rowCount) {
        return __awaiter(this, void 0, void 0, function* () {
            let sql = this.getSQL();
            let params = this.getParams();
            let count = yield this.queryCount(conn, sql, params);
            if (count > 0) {
                const rows = StringUtils_1.default.parseNumber(rowCount, DEFAULT_ROWS_PAGE);
                const offset = ((StringUtils_1.default.parseNumber(page, FIRST_PAGE) || FIRST_PAGE) - 1) * rows;
                let listSQL = `${sql} ${this.getOrderClause()} ${conn.getRowSetLimitClause(rows, offset)} `;
                logger.debug(`符合条件总数：${count}, 需要记录从${offset}开始读取${rows}条记录`);
                logger.debug('执行查询语句', listSQL, params);
                let list = count > offset ? yield conn.listQuery(listSQL, params, this.getPostConstructor()) : [];
                const hasMore = offset + rows > count;
                return { count, hasMore, list };
            }
            else {
                return { count, hasMore: false, list: [] };
            }
        });
    }
    /**
     * 不分页，返回所有符合条件的记录
     * @param conn
     */
    query(conn) {
        return __awaiter(this, void 0, void 0, function* () {
            let params = this.getParams();
            return yield conn.listQuery(`${this.getSQL()} ${this.getOrderClause()}`, params);
        });
    }
}
exports.default = SearchCriteria;
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