/*
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.dev.jjs.impl.gflow;
/**
* Transformation function defines an optional transformation of a graph node
* based on node assumptions.
*
* @param <N> graph node type.
* @param <E> graph edge type.
* @param <T> graph transformer type.
* @param <G> graph type.
* @param <A> assumption type.
*
*/
public interface TransformationFunction<N, E, T, G extends Graph<N, E, T>,
A extends Assumption<A>> {
/**
* Gets node transformation for a given node.
* @return node transformation or <code>null</code> if no transformation is
* necessary.
*/
Transformation<T, G> transform(N node, G graph,
AssumptionMap<E, A> assumptionMap);
/**
* Transformation defines new subgraph replacement for a node, and
* transformation which will be applied during the last (actualizing) step
* of analysis.
*
* @param <T> graph transformer type
* @param <G> graph type
*/
interface Transformation<T, G extends Graph<?, ?, T>> {
G getNewSubgraph();
T getGraphTransformer();
}
}