src/main/java/com/google/devtools/build/lib/analysis/LabelAndConfiguration.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76

// 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.base.Preconditions;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.cmdline.Label;

import java.util.Objects;

import javax.annotation.Nullable;

/**
* A (label,configuration) pair.
*/
public final class LabelAndConfiguration {
  private final Label label;
  @Nullable
  private final BuildConfiguration configuration;

  private LabelAndConfiguration(Label label, @Nullable BuildConfiguration configuration) {
    this.label = Preconditions.checkNotNull(label);
    this.configuration = configuration;
  }

  public LabelAndConfiguration(ConfiguredTarget rule) {
    this(rule.getTarget().getLabel(), rule.getConfiguration());
  }

  public Label getLabel() {
    return label;
  }

  @Nullable
  public BuildConfiguration getConfiguration() {
    return configuration;
  }

  @Override
  public int hashCode() {
    int configVal = configuration == null ? 79 : configuration.hashCode();
    return 31 * label.hashCode() + configVal;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (!(obj instanceof LabelAndConfiguration)) {
      return false;
    }
    LabelAndConfiguration other = (LabelAndConfiguration) obj;
    return Objects.equals(label, other.label) && Objects.equals(configuration, other.configuration);
  }

  public static LabelAndConfiguration of(
      Label label, @Nullable BuildConfiguration configuration) {
    return new LabelAndConfiguration(label, configuration);
  }
}