// Copyright 2014 Google Inc. 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 its entries and structure, for use by classes that must traverse it.
 */
@ThreadSafe
public interface QueryableGraph {
  /**
   * Returns the node with the given name, or {@code null} if the node does not exist.
   */
  @Nullable
  NodeEntry get(SkyKey key);

  /**
   * Fetches all the given nodes. Returns a map {@code m} such that {@code m.get(k).equals(e)} for
   * all {@code k} such that {@code get(k) == e} and {@code e != null}.
   */
  Map<SkyKey, NodeEntry> getBatch(Iterable<SkyKey> keys);
}

@@ -1143,103 +1143,178 @@
 that
- %7B@code m.get(k).equals(e)%7D for%0A   * all %7B@code k%7D such that %7B@code get(k) == e%7D and %7B@code e !
+, for all %7B@code k%7D in%0A   * %7B@code keys%7D, %7B@code m.get(k).equals(e)%7D iff %7B@code get(k) == e%7D and %7B@code e != null%7D, and%0A   * %7B@code !m.containsKey(k)%7D iff %7B@code get(k) =
 = nu

Fix bug in spec of getBatch.