JSON data extractor in JavaScript for JetBrains IntelliJ platform

JSON-JavaScript.json.js

/*
 * Available context bindings:
 *   COLUMNS     List<DataColumn>
 *   ROWS        Iterable<DataRow>
 *   OUT         { append() }
 *   FORMATTER   { format(row, col); formatValue(Object, col) }
 *   TRANSPOSED  Boolean
 * plus ALL_COLUMNS, TABLE, DIALECT
 *
 * where:
 *   DataRow     { rowNumber(); first(); last(); data(): List<Object>; value(column): Object }
 *   DataColumn  { columnNumber(), name() }
 */

/*
 * Based on HTML-JavaScript.html.js data extractor
 */

'use strict';

var NEWLINE = "\n";
function eachWithIdx(iterable, f) { var i = iterable.iterator(); var idx = 0; while (i.hasNext()) f(i.next(), idx++); }
function output() { for (var i = 0; i < arguments.length; i++) { OUT.append(arguments[i]); } }

output('[');
eachWithIdx(ROWS, function (row, i) {
   output(i ? ',':'', NEWLINE, '  {');
   eachWithIdx(COLUMNS, function (col, j) {
      var value = FORMATTER.format(row, col);
      switch (true) {
         case value.toUpperCase() == 'NULL':
            value = null;
            break;
         case parseInt(value).toString() == value:
            value = parseInt(value);
            break;
         case parseFloat(value).toString() == value:
            value = parseFloat(value);
            break;
      }
      output(j ? ',':'', NEWLINE, '    ', JSON.stringify(col.name()), ':', JSON.stringify(value));
   });
   output(NEWLINE, '  }');
});
output(NEWLINE, ']');