| // 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); |
| } |
| } |