| // Copyright 2015 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.analysis.constraints; |
| |
| import com.google.auto.value.AutoValue; |
| import com.google.common.collect.ImmutableCollection; |
| import com.google.common.collect.ImmutableMultimap; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable; |
| import com.google.devtools.build.lib.packages.EnvironmentGroup; |
| |
| import java.util.Map; |
| |
| /** |
| * Contains a set of {@link Environment} labels and their associated groups. |
| */ |
| @Immutable |
| public class EnvironmentCollection { |
| private final ImmutableMultimap<EnvironmentGroup, Label> map; |
| |
| private EnvironmentCollection(ImmutableMultimap<EnvironmentGroup, Label> map) { |
| this.map = map; |
| } |
| |
| /** |
| * Stores an environment's build label along with the group it belongs to. |
| */ |
| @AutoValue |
| abstract static class EnvironmentWithGroup { |
| static EnvironmentWithGroup create(Label environment, EnvironmentGroup group) { |
| return new AutoValue_EnvironmentCollection_EnvironmentWithGroup(environment, group); |
| } |
| abstract Label environment(); |
| abstract EnvironmentGroup group(); |
| } |
| |
| /** |
| * Returns the build labels of each environment in this collection, ordered by |
| * their insertion order in {@link Builder}. |
| */ |
| public ImmutableCollection<Label> getEnvironments() { |
| return map.values(); |
| } |
| |
| /** |
| * Returns the set of groups the environments in this collection belong to, ordered by |
| * their insertion order in {@link Builder} |
| */ |
| ImmutableSet<EnvironmentGroup> getGroups() { |
| return map.keySet(); |
| } |
| |
| /** |
| * Returns the build labels of each environment in this collection paired with the |
| * group each environment belongs to, ordered by their insertion order in {@link Builder}. |
| */ |
| ImmutableCollection<EnvironmentWithGroup> getGroupedEnvironments() { |
| ImmutableSet.Builder<EnvironmentWithGroup> builder = ImmutableSet.builder(); |
| for (Map.Entry<EnvironmentGroup, Label> entry : map.entries()) { |
| builder.add(EnvironmentWithGroup.create(entry.getValue(), entry.getKey())); |
| } |
| return builder.build(); |
| } |
| |
| /** |
| * Returns the environments in this collection that belong to the given group, ordered by |
| * their insertion order in {@link Builder}. If no environments belong to the given group, |
| * returns an empty collection. |
| */ |
| ImmutableCollection<Label> getEnvironments(EnvironmentGroup group) { |
| return map.get(group); |
| } |
| |
| /** |
| * An empty collection. |
| */ |
| static final EnvironmentCollection EMPTY = |
| new EnvironmentCollection(ImmutableMultimap.<EnvironmentGroup, Label>of()); |
| |
| /** |
| * Builder for {@link EnvironmentCollection}. |
| */ |
| public static class Builder { |
| private final ImmutableMultimap.Builder<EnvironmentGroup, Label> mapBuilder = |
| ImmutableMultimap.builder(); |
| |
| /** |
| * Inserts the given environment / owning group pair. |
| */ |
| public Builder put(EnvironmentGroup group, Label environment) { |
| mapBuilder.put(group, environment); |
| return this; |
| } |
| |
| /** |
| * Inserts the given set of environments, all belonging to the specified group. |
| */ |
| public Builder putAll(EnvironmentGroup group, Iterable<Label> environments) { |
| mapBuilder.putAll(group, environments); |
| return this; |
| } |
| |
| /** |
| * Inserts the contents of another {@link EnvironmentCollection} into this one. |
| */ |
| public Builder putAll(EnvironmentCollection other) { |
| mapBuilder.putAll(other.map); |
| return this; |
| } |
| |
| public EnvironmentCollection build() { |
| return new EnvironmentCollection(mapBuilder.build()); |
| } |
| } |
| } |