annotate src/implab/data/declare-model.js @ 21:7c22fc01fcec

rewritten ./text/template-compile
author cin
date Thu, 30 Nov 2017 11:01:22 +0300
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children
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1 define([ "dojo/_base/declare", "./_ModelBase", "./MapSchema" ], function(
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2 declare, _ModelBase, MapSchema) {
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3 /**
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4 * Создает новый класс, унаследованный от ./ModelBase, с указанной схемой
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5 * отображения данных.
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6 *
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7 * @details Модель представляет собой объект, живущий в рамках контекста
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8 * данных, также имеющий две схемы отображения: из модели хранения
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9 * в источнике данных (toObjectMap) и наооборот в модель хранения в
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10 * источнике данных (fromObjectMap).
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11 *
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12 * Описание схемы выглядит следующим образом
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13 * <pre>
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14 * {
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15 * name : null, // отображение в обе стороны без преобразования
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16 *
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17 * age : Number, // при преобразоваении к объекту поле будет преобразовано dst.age = Number(src.age)
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18 * // обратное преобразование отсутстсвует
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19 *
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20 * age : [Number, null] // тоже самое что и age : Number
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21 *
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22 * date : [Date, function(v) { return v.toString() }] // указывается преобразование в одну и в другую сторону
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23 * }
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24 * <pre>
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25 */
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26 return function(schema, mixins, opts) {
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27 var fromObjectSchema = {}, toObjectSchema = {};
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28 if (schema !== null && schema !== undefined) {
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29 for ( var p in schema) {
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30 var mapper = schema[p];
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31
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32 if (mapper instanceof Array) {
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33 toObjectSchema[p] = mapper[0];
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34 fromObjectSchema[p] = mapper[1];
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35 } else {
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36 toObjectSchema[p] = mapper;
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37 fromObjectSchema[p] = null;
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38 }
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39 }
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40 }
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41
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42 if (arguments.length < 3) {
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43 opts = mixins;
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44 mixins = undefined;
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45 }
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46
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47 var base = [ _ModelBase ];
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48 if (mixins) {
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49 if (mixins instanceof Array)
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50 base = base.concat(mixins);
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51 else
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52 base.push(mixins);
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53 }
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54
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55 var model = declare(base, opts);
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56
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57 model.toObjectMap = new MapSchema(toObjectSchema);
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58
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59 model.fromObjectMap = new MapSchema(fromObjectSchema);
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60
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61 model.readData = function(that, data, context) {
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62 model.toObjectMap.map(data, that, context);
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63 };
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64
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65 model.writeData = function(that, data, context) {
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66 data = data || {};
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67 model.fromObjectMap.map(that, data, context);
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68 };
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69
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70 return model;
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71 };
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72 });