Function applyDataTransform

_benchmarks/sample_echarts.js:21420–21444

(rawTransOption, sourceList, infoForPrint)

      externalTransformMap.set(type, externalTransform);
    }
    function applyDataTransform(rawTransOption, sourceList, infoForPrint) {
      var pipedTransOption = normalizeToArray(rawTransOption);
      var pipeLen = pipedTransOption.length;
      var errMsg = '';

      if (!pipeLen) {
        if ("development" !== 'production') {
          errMsg = 'If `transform` declared, it should at least contain one transform.';
        }

        throwError(errMsg);
      }

      for (var i = 0, len = pipeLen; i < len; i++) {
        var transOption = pipedTransOption[i];
        sourceList = applySingleDataTransform(transOption, sourceList, infoForPrint, pipeLen === 1 ? null : i); // piped transform only support single input, except the fist one.
        // piped transform only support single output, except the last one.

        if (i !== len - 1) {
          sourceList.length = Math.max(sourceList.length, 1);
        }
      }

      return sourceList;
    }

    function applySingleDataTransform(transOption, upSourceList, infoForPrint, // If `pipeIndex` is null/undefined, no piped transform.
    pipeIndex) {