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// 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.common.base.Preconditions;
import com.google.common.collect.Interner;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.concurrent.ThreadSafety;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyKey;
/**
* A {@link SkyKey} coming from an {@link Artifact} that is not mandatory: absence of the Artifact
* does not imply any error.
*
* <p>Since {@link Artifact} is already a {@link SkyKey}, this wrapper is only needed when the
* {@link Artifact} is not mandatory (discovered during include scanning).
*/
// TODO(janakr): pull mandatory/non-mandatory handling up to consumers and get rid of this wrapper.
@AutoCodec
public class ArtifactSkyKey implements SkyKey {
private static final Interner<ArtifactSkyKey> INTERNER = BlazeInterners.newWeakInterner();
private final Artifact.SourceArtifact artifact;
private ArtifactSkyKey(Artifact.SourceArtifact sourceArtifact) {
this.artifact = Preconditions.checkNotNull(sourceArtifact);
}
@ThreadSafety.ThreadSafe
public static SkyKey key(Artifact artifact, boolean isMandatory) {
if (isMandatory || !artifact.isSourceArtifact()) {
return artifact;
}
return create(((Artifact.SourceArtifact) artifact));
}
@AutoCodec.VisibleForSerialization
@AutoCodec.Instantiator
static ArtifactSkyKey create(Artifact.SourceArtifact artifact) {
return INTERNER.intern(new ArtifactSkyKey(artifact));
}
public static Artifact artifact(SkyKey key) {
return key instanceof Artifact ? (Artifact) key : ((ArtifactSkyKey) key).artifact;
}
public static boolean isMandatory(SkyKey key) {
return key instanceof Artifact;
}
@Override
public SkyFunctionName functionName() {
return Artifact.ARTIFACT;
}
@Override
public int hashCode() {
return artifact.hashCode();
}
@Override
public boolean equals(Object that) {
if (this == that) {
return true;
}
if (!(that instanceof ArtifactSkyKey)) {
return false;
}
ArtifactSkyKey thatArtifactSkyKey = ((ArtifactSkyKey) that);
return artifact.equals(thatArtifactSkyKey.artifact);
}
public Artifact getArtifact() {
return artifact;
}
@Override
public String toString() {
return artifact.prettyPrint() + " " + artifact.getArtifactOwner();
}
}
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