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FindPathService.js
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import SuperMap from '../SuperMap';
import NetworkAnalystServiceBase from './NetworkAnalystServiceBase';
import FindPathParameters from './FindPathParameters';
import GeoJSON from '../format/GeoJSON';
/**
* @class SuperMap.FindPathService
* @classdesc 最佳路径分析服务类。<br>
* 最佳路径是在网络数据集中指定一些节点，按照节点的选择顺序，<br>
* 顺序访问这些节点从而求解起止点之间阻抗最小的路经。<br>
* 该类负责将客户端指定的最佳路径分析参数传递给服务端，并接收服务端返回的结果数据。<br>
* 最佳路径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
* var myFindPathService = new SuperMap.FindPathService(url, {
* eventListeners: {
* "processCompleted": findPathCompleted,
* "processFailed": findPathError
* }
* });
* @param url - {string} 网络分析服务地址。请求网络分析服务，URL应为：<br>
* http://{服务器地址}:{服务端口号}/iserver/services/{网络分析服务名}/rest/networkanalyst/{网络数据集@数据源}；<br>
* 例如:"http://localhost:8090/iserver/services/components-rest/rest/networkanalyst/RoadNet@Changchun"。
* @param options - {Object} 互服务时所需可选参数。如：<br>
* eventListeners - {Object} 需要被注册的监听器对象。
*/
export default class FindPathService extends NetworkAnalystServiceBase {
constructor(url, options) {
super(url, options);
}
/**
* @function SuperMap.FindPathService.prototype.destroy
* @override
*/
destroy() {
super.destroy();
}
/**
* @function SuperMap.FindPathService.prototype.processAsync
* @description 负责将客户端的查询参数传递到服务端。
* @param params - {SuperMap.FindPathParameters} 最佳路径分析服务参数类
*/
processAsync(params) {
if (!params) {
return;
}
var me = this, jsonObject,
end = me.url.substr(me.url.length - 1, 1);
me.url = me.url + ((end === "/") ? "path" : "/path") + ".json?";
jsonObject = {
hasLeastEdgeCount: params.hasLeastEdgeCount,
parameter: SuperMap.Util.toJSON(params.parameter),
nodes: me.getJson(params.isAnalyzeById, params.nodes)
};
me.request({
method: "GET",
params: jsonObject,
scope: me,
success: me.serviceProcessCompleted,
failure: me.serviceProcessFailed
});
}
/**
* @function SuperMap.FindPathService.prototype.getJson
* @description 将对象转化为JSON字符串。
* @param isAnalyzeById - {boolean} 是否通过id分析
* @param params - {Array} 需要转换的数字
* @return {Object} 转化后的JSON字符串。
*/
getJson(isAnalyzeById, params) {
var jsonString = "[",
len = params ? params.length : 0;
if (isAnalyzeById === false) {
for (var i = 0; i < len; i++) {
if (i > 0) jsonString += ",";
jsonString += '{"x":' + params[i].x + ',"y":' + params[i].y + '}';
}
} else if (isAnalyzeById == true) {
for (var i = 0; i < len; i++) {
if (i > 0) jsonString += ",";
jsonString += params[i];
}
}
jsonString += ']';
return jsonString;
}
/**
* @function SuperMap.FindMTSPPathsService.prototype.toGeoJSONResult
* @description 将含有geometry的数据转换为geojson格式。
* @param result - {Object} 服务器返回的结果对象。
*/
toGeoJSONResult(result) {
if (!result || !result.pathList || result.pathList.length < 1) {
return null;
}
var geoJSONFormat = new GeoJSON();
result.pathList.forEach(function (path) {
if (path.route) {
path.route = JSON.parse(geoJSONFormat.write(path.route));
}
if (path.pathGuideItems) {
path.pathGuideItems = JSON.parse(geoJSONFormat.write(path.pathGuideItems));
}
if (path.edgeFeatures) {
path.edgeFeatures = JSON.parse(geoJSONFormat.write(path.edgeFeatures));
}
if (path.nodeFeatures) {
path.nodeFeatures = JSON.parse(geoJSONFormat.write(path.nodeFeatures));
}
});
return result;
}
CLASS_NAME = "SuperMap.FindPathService"
}
SuperMap.FindPathService = FindPathService;