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// Copyright (C) 2016 The Android Open Source Project
//
// 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.gerrit.server;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.gerrit.server.notedb.ReviewerStateInternal.CC;
import static com.google.gerrit.server.notedb.ReviewerStateInternal.REVIEWER;

import com.google.common.collect.HashBasedTable;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableTable;
import com.google.common.collect.Table;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.PatchSetApproval;
import com.google.gerrit.server.notedb.ReviewerStateInternal;
import java.time.Instant;

/**
 * Set of reviewers on a change.
 *
 * 

A given account may appear in multiple states and at different timestamps. No reviewers with * state {@link ReviewerStateInternal#REMOVED} are ever exposed by this interface. */ public class ReviewerSet { private static final ReviewerSet EMPTY = new ReviewerSet(ImmutableTable.of()); public static ReviewerSet fromApprovals(Iterable approvals) { PatchSetApproval first = null; Table reviewers = HashBasedTable.create(); for (PatchSetApproval psa : approvals) { if (first == null) { first = psa; } else { checkArgument( first.key().patchSetId().changeId().equals(psa.key().patchSetId().changeId()), "multiple change IDs: %s, %s", first.key(), psa.key()); } Account.Id id = psa.accountId(); reviewers.put(REVIEWER, id, psa.granted()); if (psa.value() != 0) { reviewers.remove(CC, id); } } return new ReviewerSet(reviewers); } public static ReviewerSet fromTable(Table table) { return new ReviewerSet(table); } public static ReviewerSet empty() { return EMPTY; } private final ImmutableTable table; private ImmutableSet accounts; private ReviewerSet(Table table) { this.table = ImmutableTable.copyOf(table); } public ImmutableSet all() { if (accounts == null) { // Idempotent and immutable, don't bother locking. accounts = ImmutableSet.copyOf(table.columnKeySet()); } return accounts; } public ImmutableSet byState(ReviewerStateInternal state) { return table.row(state).keySet(); } public ImmutableTable asTable() { return table; } @Override public boolean equals(Object o) { return (o instanceof ReviewerSet) && table.equals(((ReviewerSet) o).table); } @Override public int hashCode() { return table.hashCode(); } @Override public String toString() { return getClass().getSimpleName() + table; } }





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