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// 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.skyframe;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
import com.google.devtools.build.lib.skyframe.TargetPatternValue.TargetPatternKey;
import com.google.devtools.build.skyframe.SkyKey;
import com.google.devtools.build.skyframe.SkyValue;
import java.io.Serializable;
import java.util.Objects;
/**
* The value returned by {@link PrepareDepsOfPatternsFunction}. Although that function is
* invoked primarily for its side effect (i.e. ensuring the graph contains targets matching the
* pattern sequence and their transitive dependencies), this value contains the
* {@link TargetPatternKey} arguments of the {@link PrepareDepsOfPatternFunction}s evaluated in
* service of it.
*
* <p>Because the returned value may remain the same when the side-effects of this function
* evaluation change, this value and the {@link PrepareDepsOfPatternsFunction} which computes it
* are incompatible with change pruning. It should only be requested by consumers who do not
* require reevaluation when {@link PrepareDepsOfPatternsFunction} is reevaluated. Safe consumers
* include, e.g., top-level consumers, and other functions which invoke {@link
* PrepareDepsOfPatternsFunction} solely for its side-effects and which do not behave differently
* depending on those side-effects.
*/
@Immutable
@ThreadSafe
public final class PrepareDepsOfPatternsValue implements SkyValue {
private final ImmutableList<TargetPatternKey> targetPatternKeys;
PrepareDepsOfPatternsValue(ImmutableList<TargetPatternKey> targetPatternKeys) {
this.targetPatternKeys = targetPatternKeys;
}
public ImmutableList<TargetPatternKey> getTargetPatternKeys() {
return targetPatternKeys;
}
@ThreadSafe
public static SkyKey key(ImmutableList<String> patterns, String offset) {
return new SkyKey(SkyFunctions.PREPARE_DEPS_OF_PATTERNS,
new TargetPatternSequence(patterns, offset));
}
/** The argument value for {@link SkyKey}s of {@link PrepareDepsOfPatternsFunction}. */
@ThreadSafe
public static class TargetPatternSequence implements Serializable {
private final ImmutableList<String> patterns;
private final String offset;
private TargetPatternSequence(ImmutableList<String> patterns, String offset) {
this.patterns = Preconditions.checkNotNull(patterns);
this.offset = Preconditions.checkNotNull(offset);
}
public ImmutableList<String> getPatterns() {
return patterns;
}
public String getOffset() {
return offset;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof TargetPatternSequence)) {
return false;
}
TargetPatternSequence that = (TargetPatternSequence) o;
return Objects.equals(offset, that.offset) && Objects.equals(patterns, that.patterns);
}
@Override
public int hashCode() {
return Objects.hash(patterns, offset);
}
}
}
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