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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.skyframe;
import com.google.common.base.Preconditions;
import com.google.common.collect.Interner;
import com.google.devtools.build.lib.cmdline.PackageIdentifier;
import com.google.devtools.build.lib.concurrent.BlazeInterners;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.vfs.Root;
import com.google.devtools.build.skyframe.AbstractSkyKey;
import com.google.devtools.build.skyframe.SkyFunctionName;
import com.google.devtools.build.skyframe.SkyValue;
/**
* A value that represents the result of looking for the existence of a package that owns a
* specific directory path. Compare with {@link PackageLookupValue}, which deals with existence of
* a specific package.
*/
public abstract class ContainingPackageLookupValue implements SkyValue {
@AutoCodec public static final NoContainingPackage NONE = new NoContainingPackage();
/** Returns whether there is a containing package. */
public abstract boolean hasContainingPackage();
/** If there is a containing package, returns its name. */
public abstract PackageIdentifier getContainingPackageName();
/** If there is a containing package, returns its package root */
public abstract Root getContainingPackageRoot();
public static Key key(PackageIdentifier id) {
Preconditions.checkArgument(!id.getPackageFragment().isAbsolute(), id);
Preconditions.checkArgument(!id.getRepository().isDefault(), id);
return Key.create(id);
}
@AutoCodec.VisibleForSerialization
@AutoCodec
static class Key extends AbstractSkyKey<PackageIdentifier> {
private static final Interner<Key> interner = BlazeInterners.newWeakInterner();
private Key(PackageIdentifier arg) {
super(arg);
}
@AutoCodec.VisibleForSerialization
@AutoCodec.Instantiator
static Key create(PackageIdentifier arg) {
return interner.intern(new Key(arg));
}
@Override
public SkyFunctionName functionName() {
return SkyFunctions.CONTAINING_PACKAGE_LOOKUP;
}
}
public static ContainingPackage withContainingPackage(PackageIdentifier pkgId, Root root) {
return new ContainingPackage(pkgId, root);
}
/** Value indicating there is no containing package. */
public static class NoContainingPackage extends ContainingPackageLookupValue {
private NoContainingPackage() {}
@Override
public boolean hasContainingPackage() {
return false;
}
@Override
public PackageIdentifier getContainingPackageName() {
throw new IllegalStateException();
}
@Override
public Root getContainingPackageRoot() {
throw new IllegalStateException();
}
}
/** A successful lookup value. */
@AutoCodec
public static class ContainingPackage extends ContainingPackageLookupValue {
private final PackageIdentifier containingPackage;
private final Root containingPackageRoot;
@AutoCodec.Instantiator
@AutoCodec.VisibleForSerialization
ContainingPackage(PackageIdentifier containingPackage, Root containingPackageRoot) {
this.containingPackage = containingPackage;
this.containingPackageRoot = containingPackageRoot;
}
@Override
public boolean hasContainingPackage() {
return true;
}
@Override
public PackageIdentifier getContainingPackageName() {
return containingPackage;
}
@Override
public Root getContainingPackageRoot() {
return containingPackageRoot;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof ContainingPackage)) {
return false;
}
ContainingPackage other = (ContainingPackage) obj;
return containingPackage.equals(other.containingPackage)
&& containingPackageRoot.equals(other.containingPackageRoot);
}
@Override
public int hashCode() {
return containingPackage.hashCode();
}
}
}
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