| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // 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.devtools.build.skyframe; |
| |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe; |
| |
| import java.util.Map; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * A graph that exposes thin representations of its entries and structure, for use by classes that |
| * must traverse it, but not read its entries' values. |
| */ |
| @ThreadSafe |
| public interface ThinNodeQueryableGraph { |
| /** |
| * Returns the thin node with the given name, or {@code null} if the node does not exist. |
| */ |
| @Nullable |
| ThinNodeEntry get(SkyKey key); |
| |
| /** |
| * Fetches all the given thin nodes. Returns a map {@code m} such that, for all {@code k} in |
| * {@code keys}, {@code m.get(k).equals(e)} iff {@code get(k) == e} and {@code e != null}, and |
| * {@code !m.containsKey(k)} iff {@code get(k) == null}. |
| */ |
| Map<SkyKey, ? extends ThinNodeEntry> getBatch(Iterable<SkyKey> keys); |
| } |