package gw.exportimport
uses java.util.concurrent.Callable
uses gw.api.extension.ExtensionInterfaces

/**
 * An {@link AbstractAsynchronousRowExecutor} responsible for wrapping an {@link ExcelExporter}.
 */
@ReadOnly 
class AsynchronousExcelExporter extends AbstractAsynchronousRowExecutor<byte[]> {

  var _data : ExportData< KeyableBean >
  var _template : boolean
  var _rowsExported : int as Row

  function initialize(data : ExportData< KeyableBean >, template : boolean) {
    super.initialize()
    _data = data
    _template = template
  }

  function streamExcelFile() {
    ExtensionInterfaces.IExcelFileWriterExtensions.saveExcelFile(Result, _data, _template)
  }

  override function createCallable() : Callable<byte[]> {
    return new ExportCallable()
  }

  private class ExportCallable implements Callable<byte[]> {
    override function call() : byte[] {
      var exporter = ExtensionInterfaces.IExcelExporterFactory.newInstance(_data, outer)
      return exporter.exportWorkbookInMemory(_template)
    }
  }

}