// 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.lib.actions;

import com.google.devtools.build.lib.events.Location;

/**
 * This exception is thrown during a build when an input file is missing, but the file
 * is not the input to any action being executed.
 *
 * If a missing input file is an input
 * to an action, an {@link ActionExecutionException} is thrown instead.
 */
public class MissingInputFileException extends BuildFailedException {
  private final Location location;

  public MissingInputFileException(String message, Location location) {
    super(message);
    this.location = location;
  }

  /**
   * Return a location where this input file is referenced. If there
   * are multiple such locations, one is chosen arbitrarily. If there
   * are none, return null.
   */
  public Location getLocation() {
    return location;
  }
}