analytics/webcontent/bi/js/dashboard-analytics/visualizations/vipr/data/VIPRDataPointIterator.js

'use strict';

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

/**
 * Licensed Materials - Property of IBM
 * IBM Business Analytics (C) Copyright IBM Corp. 2019, 2020
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */
define(['underscore', './VIPRDataPoint'], function (_, VIPRDataPoint) {

	// implements IDataPointIterator
	var VIPRDataPointIterator = function () {
		function VIPRDataPointIterator(dataset, context) {
			_classCallCheck(this, VIPRDataPointIterator);

			this.dataPointIndex = -1;
			this.queryResult = dataset.queryResult;
			this.dataset = dataset;
			this.dataItemInfo = this._getDataItemInfo();

			//viprDataPoints is a map that matches the lifecycle of the VIPRDataset.  
			//It stores backing datapoint objects that the vipr IDataPoint objects use for their API.
			//This is needed to support decorating the IDataPoints.
			this.viprDataPoints = this.dataset.viprDataPoints;

			this.context = context;
		}

		VIPRDataPointIterator.prototype.nextValue = function nextValue() {
			if (++this.dataPointIndex < this.queryResult.getRowCount()) {
				var thisdatapoint = this.viprDataPoints[this.dataPointIndex];
				//No IDatapoint exists for this key yet....create an object and create the API with asIDataPoint.
				if (!thisdatapoint) {
					thisdatapoint = new VIPRDataPoint(this.dataPointIndex, this.dataset, this.dataItemInfo, this.context);
					this.viprDataPoints[this.dataPointIndex] = thisdatapoint;
				}
				return thisdatapoint;
			}
			return null;
		};

		VIPRDataPointIterator.prototype.getTupleItems = function getTupleItems() {
			return this.viprDataPoints[this.dataPointIndex].getTupleItems();
		};

		//Cache information about the dataItems to avoid


		VIPRDataPointIterator.prototype._getDataItemInfo = function _getDataItemInfo() {
			var _this = this;

			var dataItemInfo = {
				isLatLong: {},
				formatter: {}
			};

			this.dataset.dataItems.forEach(function (dataItem, resultItemIndex) {
				var slotDef = _this.dataset.slots[resultItemIndex] && _this.dataset.slots[resultItemIndex].getDefinition();
				var subType = slotDef && slotDef.getSubType();
				if (subType === 'longitude' || subType === 'latitude') {
					dataItemInfo.isLatLong[resultItemIndex] = true;
				}
				if (dataItem.getFormatter) {
					dataItemInfo.formatter[resultItemIndex] = dataItem.getFormatter && dataItem.getFormatter();
				}
			});

			return dataItemInfo;
		};

		return VIPRDataPointIterator;
	}();

	return VIPRDataPointIterator;
});
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