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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.skyframe;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.events.Event;
import java.io.Serializable;
import java.util.Objects;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
/**
* A wrapper of {@link Event} that contains a tag of the label where the event was generated. This
* class allows us to tell where the events are coming from when we group all the tags in a
* NestedSet.
*
* <p>The only usage of this code for now is to be able to use --output_filter in Skyframe
*
* <p>This is intended only for use in alternative {@code MemoizingEvaluator} implementations.
*/
@Immutable
public final class TaggedEvents implements Serializable {
private final ImmutableList<Event> events;
private final int hashCode;
@VisibleForTesting
public TaggedEvents(final @Nullable String tag, ImmutableCollection<Event> events) {
this.events =
events.isEmpty()
? ImmutableList.of()
: ImmutableList.copyOf(
Collections2.transform(
events,
(Event e) -> e.withTag(tag)));
this.hashCode = events.hashCode();
}
ImmutableList<Event> getEvents() {
return events;
}
/**
* Returns <i>some</i> moderately sane representation of the events. Should never be used in
* user-visible places, only for debugging and testing.
*/
@Override
public String toString() {
return events.toString();
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof TaggedEvents)) {
return false;
}
TaggedEvents that = (TaggedEvents) other;
return (hashCode == that.hashCode) && Objects.equals(this.events, that.events);
}
}
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