| // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library barback.transform; |
| |
| import 'asset.dart'; |
| import 'asset_set.dart'; |
| import 'base_transform.dart'; |
| import 'transform_logger.dart'; |
| import 'transform_node.dart'; |
| |
| /// While a [Transformer] represents a *kind* of transformation, this defines |
| /// one specific usage of it on a set of files. |
| /// |
| /// This ephemeral object exists only during an actual transform application to |
| /// facilitate communication between the [Transformer] and the code hosting |
| /// the transformation. It lets the [Transformer] access inputs and generate |
| /// outputs. |
| class Transform extends BaseTransform { |
| final AssetSet _outputs; |
| |
| Transform(TransformNode node, this._outputs, LogFunction logFunction) |
| : super(node, logFunction); |
| |
| /// Stores [output] as the output created by this transformation. |
| /// |
| /// A transformation can output as many assets as it wants. |
| void addOutput(Asset output) { |
| // TODO(rnystrom): This should immediately throw if an output with that ID |
| // has already been created by this transformer. |
| _outputs.add(output); |
| } |
| } |