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// Copyright 2018 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;
import com.google.common.base.Preconditions;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.SetMultimap;
import com.google.common.collect.Sets;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.cmdline.Label;
import java.util.HashSet;
import java.util.Set;
/**
* Morally a {@link SetMultimap} from artifacts to the labels that own them, which may not be just
* {@link Artifact#getOwnerLabel} depending on the build. Optimizes for artifacts that are owned by
* their {@link Artifact#getOwnerLabel} by storing them separately.
*/
public class ArtifactsToOwnerLabels {
private final SetMultimap<Artifact, Label> artifactToMultipleOrDifferentOwnerLabels;
private final Set<Artifact> artifactsOwnedOnlyByTheirLabels;
private ArtifactsToOwnerLabels(
SetMultimap<Artifact, Label> artifactToMultipleOrDifferentOwnerLabels,
Set<Artifact> artifactsOwnedOnlyByTheirLabels) {
this.artifactToMultipleOrDifferentOwnerLabels = artifactToMultipleOrDifferentOwnerLabels;
this.artifactsOwnedOnlyByTheirLabels = artifactsOwnedOnlyByTheirLabels;
}
public Set<Label> getOwners(Artifact artifact) {
if (artifactsOwnedOnlyByTheirLabels.contains(artifact)) {
Preconditions.checkState(
!artifactToMultipleOrDifferentOwnerLabels.containsKey(artifact),
"Artifact %s incorrectly in multiple categories",
artifact);
Label ownerLabel = artifact.getOwnerLabel();
if (ownerLabel == null) {
return ImmutableSet.of();
}
return ImmutableSet.of(ownerLabel);
}
return Preconditions.checkNotNull(
artifactToMultipleOrDifferentOwnerLabels.get(artifact), artifact);
}
public Set<Artifact> getArtifacts() {
return Sets.union(
artifactsOwnedOnlyByTheirLabels, artifactToMultipleOrDifferentOwnerLabels.keySet());
}
public Builder toBuilder() {
return new Builder(
HashMultimap.create(artifactToMultipleOrDifferentOwnerLabels),
new HashSet<>(artifactsOwnedOnlyByTheirLabels));
}
static class Builder {
private final SetMultimap<Artifact, Label> artifactToMultipleOrDifferentOwnerLabels;
private final Set<Artifact> artifactsOwnedOnlyByTheirLabels;
Builder() {
this(HashMultimap.create(), new HashSet<>());
}
private Builder(
SetMultimap<Artifact, Label> artifactToMultipleOrDifferentOwnerLabels,
Set<Artifact> artifactsOwnedOnlyByTheirLabels) {
this.artifactToMultipleOrDifferentOwnerLabels = artifactToMultipleOrDifferentOwnerLabels;
this.artifactsOwnedOnlyByTheirLabels = artifactsOwnedOnlyByTheirLabels;
}
public Builder addArtifact(Artifact artifact) {
if (artifactToMultipleOrDifferentOwnerLabels.containsKey(artifact)) {
Label ownerLabel = artifact.getOwnerLabel();
if (ownerLabel != null) {
artifactToMultipleOrDifferentOwnerLabels.put(artifact, artifact.getOwnerLabel());
}
} else {
artifactsOwnedOnlyByTheirLabels.add(artifact);
}
return this;
}
public Builder addArtifact(Artifact artifact, Label label) {
Preconditions.checkNotNull(label, artifact);
if (label.equals(artifact.getOwnerLabel())) {
addArtifact(artifact);
} else {
artifactToMultipleOrDifferentOwnerLabels.put(artifact, label);
if (artifactsOwnedOnlyByTheirLabels.remove(artifact)) {
// Redoing this call now that we have a mismatched label will force addition into the
// multimap.
addArtifact(artifact);
}
}
return this;
}
ArtifactsToOwnerLabels build() {
return new ArtifactsToOwnerLabels(
artifactToMultipleOrDifferentOwnerLabels, artifactsOwnedOnlyByTheirLabels);
}
}
}
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