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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.lib.analysis;

import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;

import java.util.Objects;
import java.util.Set;

/**
 * Contains options which control the set of artifacts to build for top-level targets.
 */
@Immutable
public final class TopLevelArtifactContext {

  public static final TopLevelArtifactContext DEFAULT = new TopLevelArtifactContext(
      "", /*buildDefaultArtifacts=*/true, /*runTestsExclusively=*/false,
      /*outputGroups=*/ImmutableSet.<String>of(), /*shouldRunTests=*/false);

  private final String buildCommand;
  private final boolean buildDefaultArtifacts;
  private final boolean runTestsExclusively;
  private final ImmutableSet<String> outputGroups;
  private final boolean shouldRunTests;

  public TopLevelArtifactContext(String buildCommand, boolean filesToRun,
      boolean runTestsExclusively, ImmutableSet<String> outputGroups, boolean shouldRunTests) {
    this.buildCommand = buildCommand;
    this.buildDefaultArtifacts = filesToRun;
    this.runTestsExclusively = runTestsExclusively;
    this.outputGroups = outputGroups;
    this.shouldRunTests = shouldRunTests;
  }

  /** Returns the build command as a string. */
  public String buildCommand() {
    return buildCommand;
  }

  /** Returns the value of the (undocumented) --build_default_artifacts flag. */
  public boolean buildDefaultArtifacts() {
    return buildDefaultArtifacts;
  }

  /** Whether to run tests in exclusive mode. */
  public boolean runTestsExclusively() {
    return runTestsExclusively;
  }

  /** Returns the value of the --output_groups flag. */
  public Set<String> outputGroups() {
    return outputGroups;
  }

  /** Whether the top-level request command may run tests. */
  public boolean shouldRunTests() {
    return shouldRunTests;
  }
  
  // TopLevelArtifactContexts are stored in maps in BuildView,
  // so equals() and hashCode() need to work.
  @Override
  public boolean equals(Object other) {
    if (other instanceof TopLevelArtifactContext) {
      TopLevelArtifactContext otherContext = (TopLevelArtifactContext) other;
      return buildCommand.equals(otherContext.buildCommand)
          && buildDefaultArtifacts == otherContext.buildDefaultArtifacts
          && runTestsExclusively == otherContext.runTestsExclusively
          && outputGroups.equals(otherContext.outputGroups)
          && shouldRunTests == otherContext.shouldRunTests;
    } else {
      return false;
    }
  }

  @Override
  public int hashCode() {
    return Objects.hash(
        buildCommand, buildDefaultArtifacts, runTestsExclusively, outputGroups, shouldRunTests);
  }
}