| /* |
| * Copyright 2013-present Facebook, 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.facebook.buck.graph; |
| |
| /** |
| * Minimal interface needed by {@link AbstractBottomUpTraversal} to traverse a graph. |
| */ |
| public interface TraversableGraph<T> { |
| |
| /** @return {@link Iterable} that the caller is not allowed to mutate. */ |
| public Iterable<T> getNodesWithNoIncomingEdges(); |
| |
| /** @return {@link Iterable} that the caller is not allowed to mutate. */ |
| public Iterable<T> getNodesWithNoOutgoingEdges(); |
| |
| /** @return {@link Iterable} that the caller is not allowed to mutate. */ |
| public Iterable<T> getIncomingNodesFor(T sink); |
| |
| /** @return {@link Iterable} that the caller is not allowed to mutate. */ |
| public Iterable<T> getOutgoingNodesFor(T source); |
| } |