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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.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.PatchSetApproval;
import com.google.gerrit.server.notedb.ReviewerStateInternal;
import java.sql.Timestamp;
/**
* Set of reviewers on a change.
*
* <p>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.<ReviewerStateInternal, Account.Id, Timestamp>of());
public static ReviewerSet fromApprovals(Iterable<PatchSetApproval> approvals) {
PatchSetApproval first = null;
Table<ReviewerStateInternal, Account.Id, Timestamp> reviewers = HashBasedTable.create();
for (PatchSetApproval psa : approvals) {
if (first == null) {
first = psa;
} else {
checkArgument(
first
.getKey()
.getParentKey()
.getParentKey()
.equals(psa.getKey().getParentKey().getParentKey()),
"multiple change IDs: %s, %s",
first.getKey(),
psa.getKey());
}
Account.Id id = psa.getAccountId();
reviewers.put(REVIEWER, id, psa.getGranted());
if (psa.getValue() != 0) {
reviewers.remove(CC, id);
}
}
return new ReviewerSet(reviewers);
}
public static ReviewerSet fromTable(Table<ReviewerStateInternal, Account.Id, Timestamp> table) {
return new ReviewerSet(table);
}
public static ReviewerSet empty() {
return EMPTY;
}
private final ImmutableTable<ReviewerStateInternal, Account.Id, Timestamp> table;
private ImmutableSet<Account.Id> accounts;
private ReviewerSet(Table<ReviewerStateInternal, Account.Id, Timestamp> table) {
this.table = ImmutableTable.copyOf(table);
}
public ImmutableSet<Account.Id> all() {
if (accounts == null) {
// Idempotent and immutable, don't bother locking.
accounts = ImmutableSet.copyOf(table.columnKeySet());
}
return accounts;
}
public ImmutableSet<Account.Id> byState(ReviewerStateInternal state) {
return table.row(state).keySet();
}
public ImmutableTable<ReviewerStateInternal, Account.Id, Timestamp> 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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