TypeScript AttributeInfo.fromJSs方法代碼示例

    it('adds new dimensions', () => {
      var columns: any = [
        { "name": "__time", "type": "TIME" },
        { "name": "added", "makerAction": { "action": "sum", "expression": { "name": "added", "op": "ref" }}, "type": "NUMBER", "unsplitable": true },
        { "name": "count", "makerAction": { "action": "count"}, "type": "NUMBER", "unsplitable": true },
        { "name": "delta_hist", "special": "histogram", "type": "NUMBER" },
        { "name": "page", "type": "STRING" },
        { "name": "page_unique", "special": "unique", "type": "STRING" }
      ];

      var dataCube1 = dataCube.addAttributes(AttributeInfo.fromJSs(columns));

      expect(dataCube1.toJS().dimensions).to.deep.equal([
        {
          "kind": "time",
          "name": "__time",
          "title": "Time",
          "formula": "$__time"
        },
        {
          "kind": "string",
          "name": "page",
          "title": "Page",
          "formula": "$page"
        }
      ]);

      columns.push({ "name": "channel", "type": "STRING" });
      var dataCube2 = dataCube1.addAttributes(AttributeInfo.fromJSs(columns));

      expect(dataCube2.toJS().dimensions).to.deep.equal([
        {
          "kind": "time",
          "name": "__time",
          "title": "Time",
          "formula": "$__time"
        },
        {
          "kind": "string",
          "name": "page",
          "title": "Page",
          "formula": "$page"
        },
        {
          "kind": "string",
          "name": "channel",
          "title": "Channel",
          "formula": "$channel"
        }
      ]);

    });

/**
 * This function tries to deduce the structure of the dataSource based on the dimensions and measures defined within.
 * It should only be used when for some reason introspection if not available.
 * @param dataSource
 * @returns {Attributes}
 */
function deduceAttributes(dataSource: DataSource): Attributes {
  var attributeJSs: AttributeJSs = [];

  dataSource.dimensions.forEach((dimension) => {
    // ToDo: fix this.
    attributeJSs.push({ name: dimension.name, type: 'STRING' });
  });

  dataSource.measures.forEach((measure) => {
    var expression = measure.expression;
    var references = getReferences(expression);
    var countDistinctReferences = getCountDistinctReferences(expression);
    for (var reference of references) {
      if (reference === 'main') continue;
      if (countDistinctReferences.indexOf(reference) !== -1) {
        attributeJSs.push({ name: reference, special: 'unique' });
      } else {
        attributeJSs.push({ name: reference, type: 'NUMBER' });
      }
    }
  });

  var attributes = AttributeInfo.fromJSs(attributeJSs);
  if (dataSource.options['attributeOverrides']) {
    attributes = AttributeInfo.applyOverrides(attributes, dataSource.options['attributeOverrides']);
  }

  return attributes;
}

/**
 * This function tries to deduce the structure of the dataSource based on the dimensions and measures defined within.
 * It should only be used when, for some reason, introspection if not available.
 * @param dataSource
 * @returns {Attributes}
 */
function deduceAttributes(dataSource: DataSource): Attributes {
  var attributeJSs: AttributeJSs = [];

  var timeAttribute = dataSource.timeAttribute;
  if (timeAttribute) {
    attributeJSs.push({ name: timeAttribute.name, type: 'TIME' });
  }

  dataSource.dimensions.forEach((dimension) => {
    var expression = dimension.expression;
    if (expression.equals(timeAttribute)) return;
    var references = getReferences(expression);
    for (var reference of references) {
      if (reference === 'main') continue;
      attributeJSs.push({ name: reference, type: 'STRING' });
    }
  });

  dataSource.measures.forEach((measure) => {
    var expression = measure.expression;
    var references = getReferences(expression);
    var countDistinctReferences = getCountDistinctReferences(expression);
    for (var reference of references) {
      if (reference === 'main') continue;
      if (countDistinctReferences.indexOf(reference) !== -1) {
        attributeJSs.push({ name: reference, special: 'unique' });
      } else {
        attributeJSs.push({ name: reference, type: 'NUMBER' });
      }
    }
  });

  var attributes = AttributeInfo.fromJSs(attributeJSs);
  if (dataSource.attributeOverrides.length) {
    attributes = AttributeInfo.override(attributes, dataSource.attributeOverrides);
  }

  return attributes;
}

    it("works with existing dimension", () => {
      var attributes1 = AttributeInfo.fromJSs([
        { name: '__time', type: 'TIME' },
        { name: 'added', type: 'NUMBER' },
        { name: 'added!!!', type: 'NUMBER' },
        { name: 'deleted', type: 'NUMBER' }
      ]);

      var dataSourceWithDim = DataSource.fromJS({
        name: 'wiki',
        title: 'Wiki',
        engine: 'druid',
        source: 'wiki',
        subsetFilter: null,
        introspection: 'autofill-all',
        defaultTimezone: 'Etc/UTC',
        defaultFilter: { op: 'literal', value: true },
        refreshRule: {
          refresh: "PT1M",
          rule: "fixed"
        },
        dimensions: [
          {
            name: 'added',
            expression: '$added'
          },
          {
            name: 'added_',
            expression: '${added!!!}'
          }
        ]
      });

      var dataSource = dataSourceWithDim.addAttributes(attributes1);
      expect(dataSource.toJS().measures.map(m => m.name)).to.deep.equal(['deleted']);
    });