src/main/java/com/google/devtools/build/skyframe/QueryableGraph.java


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// 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;

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