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// Copyright (C) 2015 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.git;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.MultimapBuilder;
import com.google.gerrit.reviewdb.client.Branch;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gwtorm.server.OrmException;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* A set of changes grouped together to be submitted atomically.
*
* <p>MergeSuperSet constructs ChangeSets to accumulate intermediate results toward the ChangeSet it
* returns when done.
*
* <p>This class is not thread safe.
*/
public class ChangeSet {
private final ImmutableMap<Change.Id, ChangeData> changeData;
/**
* Additional changes not included in changeData because their connection to the original change
* is not visible to the current user. That is, this map includes both - changes that are not
* visible to the current user, and - changes whose only relationship to the set is via a change
* that is not visible to the current user
*/
private final ImmutableMap<Change.Id, ChangeData> nonVisibleChanges;
private static ImmutableMap<Change.Id, ChangeData> index(
Iterable<ChangeData> changes, Collection<Change.Id> exclude) {
Map<Change.Id, ChangeData> ret = new LinkedHashMap<>();
for (ChangeData cd : changes) {
Change.Id id = cd.getId();
if (!ret.containsKey(id) && !exclude.contains(id)) {
ret.put(id, cd);
}
}
return ImmutableMap.copyOf(ret);
}
public ChangeSet(Iterable<ChangeData> changes, Iterable<ChangeData> hiddenChanges) {
changeData = index(changes, ImmutableList.<Change.Id>of());
nonVisibleChanges = index(hiddenChanges, changeData.keySet());
}
public ChangeSet(ChangeData change, boolean visible) {
this(
visible ? ImmutableList.of(change) : ImmutableList.<ChangeData>of(),
ImmutableList.of(change));
}
public ImmutableSet<Change.Id> ids() {
return changeData.keySet();
}
public ImmutableMap<Change.Id, ChangeData> changesById() {
return changeData;
}
public ListMultimap<Branch.NameKey, ChangeData> changesByBranch() throws OrmException {
ListMultimap<Branch.NameKey, ChangeData> ret =
MultimapBuilder.hashKeys().arrayListValues().build();
for (ChangeData cd : changeData.values()) {
ret.put(cd.change().getDest(), cd);
}
return ret;
}
public ImmutableCollection<ChangeData> changes() {
return changeData.values();
}
public ImmutableSet<Project.NameKey> projects() {
ImmutableSet.Builder<Project.NameKey> ret = ImmutableSet.builder();
for (ChangeData cd : changeData.values()) {
ret.add(cd.project());
}
return ret.build();
}
public ImmutableSet<Change.Id> nonVisibleIds() {
return nonVisibleChanges.keySet();
}
public ImmutableList<ChangeData> nonVisibleChanges() {
return nonVisibleChanges.values().asList();
}
public boolean furtherHiddenChanges() {
return !nonVisibleChanges.isEmpty();
}
public int size() {
return changeData.size() + nonVisibleChanges.size();
}
@Override
public String toString() {
return getClass().getSimpleName() + ids() + nonVisibleIds();
}
}
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