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FindLocationService.js
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121 lines (111 loc) · 4.48 KB
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/* Copyright© 2000 - 2018 SuperMap Software Co.Ltd. All rights reserved.
* This program are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
import {SuperMap} from '../SuperMap';
import {Util} from '../commontypes/Util';
import {NetworkAnalystServiceBase} from './NetworkAnalystServiceBase';
import {FindLocationParameters} from './FindLocationParameters';
import {GeoJSON} from '../format/GeoJSON';
/**
* @class SuperMap.FindLocationService
* @category iServer NetworkAnalyst Location
* @classdesc 选址分区分析服务类。
* 选址分区分析是为了确定一个或多个待建设施的最佳或最优位置，使得设施可以用一种最经济有效的方式为需求方提供服务或者商品。
* 选址分区不仅仅是一个选址过程，还要将需求点的需求分配到相应的新建设施的服务区中，因此称之为选址与分区。
* 选址分区分析结果通过该类支持的事件的监听函数参数获取
* @extends {SuperMap.NetworkAnalystServiceBase}
* @example
* (start code)
* var findLocationService = new SuperMap.FindLocationService(url, {
* eventListeners: {
* "processCompleted": findLocationCompleted,
* "processFailed": findLocationError
* }
* });
* (end)
* @param {string} url - 服务的访问地址。
* 如 http://localhost:8090/iserver/services/transportationanalyst-sample/rest/networkanalyst/RoadNet@Changchun 。
* @param {Object} options - 参数。
* @param {Object} options.eventListeners - 需要被注册的监听器对象。
*/
export class FindLocationService extends NetworkAnalystServiceBase {
constructor(url, options) {
super(url, options);
this.CLASS_NAME = "SuperMap.FindLocationService";
}
/**
* @function SuperMap.FindLocationService.prototype.destroy
* @override
*/
destroy() {
super.destroy();
}
/**
* @function SuperMap.FindLocationService.prototype.processAsync
* @description 负责将客户端的查询参数传递到服务端。
* @param {SuperMap.FindLocationParameters} params - 选址分区分析服务参数类
*/
processAsync(params) {
if (!(params instanceof FindLocationParameters)) {
return;
}
var me = this, jsonObject,
end = me.url.substr(me.url.length - 1, 1);
me.url = me.url + ((end === "/") ? "location" : "/location") + ".json?";
jsonObject = {
isFromCenter: params.isFromCenter,
expectedSupplyCenterCount: params.expectedSupplyCenterCount,
weightName: params.weightName,
turnWeightField: params.turnWeightField,
returnEdgeFeature: true,
returnEdgeGeometry: true,
returnNodeFeature: true,
mapParameter: Util.toJSON(params.mapParameter),
supplyCenters: me.getCentersJson(params.supplyCenters)
};
me.request({
method: "GET",
params: jsonObject,
scope: me,
success: me.serviceProcessCompleted,
failure: me.serviceProcessFailed
});
}
/**
* @function SuperMap.FindLocationService.prototype.getCentersJson
* @description 将数组对象转化为JSON字符串。
* @param {Array} params - 需要转换的参数
* @returns {string} 转化后的JSON字符串。
*/
getCentersJson(params) {
var json = "[",
len = params ? params.length : 0;
for (var i = 0; i < len; i++) {
if (i > 0) {
json += ",";
}
json += Util.toJSON(params[i]);
}
json += "]";
return json;
}
/**
* @function SuperMap.FindLocationService.prototype.toGeoJSONResult
* @description 将含有 geometry 的数据转换为 GeoJSON 格式。
* @param {Object} result - 服务器返回的结果对象。
*/
toGeoJSONResult(result) {
if (!result) {
return null;
}
var geoJSONFormat = new GeoJSON();
if (result.demandResults) {
result.demandResults = JSON.parse(geoJSONFormat.write(result.demandResults));
}
if (result.supplyResults) {
result.supplyResults = JSON.parse(geoJSONFormat.write(result.supplyResults));
}
return result;
}
}
SuperMap.FindLocationService = FindLocationService;