Function createExternalSource

_benchmarks/sample_echarts.js:21209–21313

(internalSource, externalTransform)

    }();

    function createExternalSource(internalSource, externalTransform) {
      var extSource = new ExternalSource();
      var data = internalSource.data;
      var sourceFormat = extSource.sourceFormat = internalSource.sourceFormat;
      var sourceHeaderCount = internalSource.startIndex;
      var errMsg = '';

      if (internalSource.seriesLayoutBy !== SERIES_LAYOUT_BY_COLUMN) {
        // For the logic simplicity in transformer, only 'culumn' is
        // supported in data transform. Otherwise, the `dimensionsDefine`
        // might be detected by 'row', which probably confuses users.
        if ("development" !== 'production') {
          errMsg = '`seriesLayoutBy` of upstream dataset can only be "column" in data transform.';
        }

        throwError(errMsg);
      } // [MEMO]
      // Create a new dimensions structure for exposing.
      // Do not expose all dimension info to users directly.
      // Becuase the dimension is probably auto detected from data and not might reliable.
      // Should not lead the transformers to think that is relialbe and return it.
      // See [DIMENSION_INHERIT_RULE] in `sourceManager.ts`.


      var dimensions = [];
      var dimsByName = {};
      var dimsDef = internalSource.dimensionsDefine;

      if (dimsDef) {
        each(dimsDef, function (dimDef, idx) {
          var name = dimDef.name;
          var dimDefExt = {
            index: idx,
            name: name,
            displayName: dimDef.displayName
          };
          dimensions.push(dimDefExt); // Users probably not sepcify dimension name. For simplicity, data transform
          // do not generate dimension name.

          if (name != null) {
            // Dimension name should not be duplicated.
            // For simplicity, data transform forbid name duplication, do not generate
            // new name like module `completeDimensions.ts` did, but just tell users.
            var errMsg_1 = '';

            if (hasOwn(dimsByName, name)) {
              if ("development" !== 'production') {
                errMsg_1 = 'dimension name "' + name + '" duplicated.';
              }

              throwError(errMsg_1);
            }

            dimsByName[name] = dimDefExt;
          }
        });
      } // If dimension definitions are not defined and can not be detected.
      // e.g., pure data `[[11, 22], ...]`.