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// Copyright (C) 2012 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.change;
import com.google.common.hash.Hasher;
import com.google.common.hash.Hashing;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.entities.Project;
import com.google.gerrit.extensions.restapi.RestResource;
import com.google.gerrit.extensions.restapi.RestResource.HasETag;
import com.google.gerrit.extensions.restapi.RestView;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.edit.ChangeEdit;
import com.google.gerrit.server.logging.Metadata;
import com.google.gerrit.server.logging.TraceContext;
import com.google.gerrit.server.logging.TraceContext.TraceTimer;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.inject.TypeLiteral;
import java.util.Optional;
public class RevisionResource implements RestResource, HasETag {
public static final TypeLiteral<RestView<RevisionResource>> REVISION_KIND =
new TypeLiteral<RestView<RevisionResource>>() {};
public static RevisionResource createNonCacheable(ChangeResource change, PatchSet ps) {
return new RevisionResource(change, ps, Optional.empty(), false);
}
private final ChangeResource change;
private final PatchSet ps;
private final Optional<ChangeEdit> edit;
private final boolean cacheable;
public RevisionResource(ChangeResource change, PatchSet ps) {
this(change, ps, Optional.empty());
}
public RevisionResource(ChangeResource change, PatchSet ps, Optional<ChangeEdit> edit) {
this(change, ps, edit, true);
}
private RevisionResource(
ChangeResource change, PatchSet ps, Optional<ChangeEdit> edit, boolean cacheable) {
this.change = change;
this.ps = ps;
this.edit = edit;
this.cacheable = cacheable;
}
public boolean isCacheable() {
return cacheable;
}
public PermissionBackend.ForChange permissions() {
return change.permissions();
}
public ChangeResource getChangeResource() {
return change;
}
public Change getChange() {
return getChangeResource().getChange();
}
public Project.NameKey getProject() {
return getChange().getProject();
}
public ChangeNotes getNotes() {
return getChangeResource().getNotes();
}
public PatchSet getPatchSet() {
return ps;
}
@Override
public String getETag() {
try (TraceTimer ignored =
TraceContext.newTimer(
"Compute revision ETag",
Metadata.builder()
.changeId(change.getId().get())
.patchSetId(ps.number())
.projectName(change.getProject().get())
.build())) {
Hasher h = Hashing.murmur3_128().newHasher();
prepareETag(h, getUser());
return h.hash().toString();
}
}
public void prepareETag(Hasher h, CurrentUser user) {
// Conservative estimate: refresh the revision if its parent change has changed, so we don't
// have to check whether a given modification affected this revision specifically.
change.prepareETag(h, user);
}
public Account.Id getAccountId() {
return getUser().getAccountId();
}
public CurrentUser getUser() {
return getChangeResource().getUser();
}
public Optional<ChangeEdit> getEdit() {
return edit;
}
@Override
public String toString() {
String s = ps.id().toString();
if (edit.isPresent()) {
s = "edit:" + s;
}
return s;
}
public boolean isCurrent() {
return ps.id().equals(getChange().currentPatchSetId());
}
}
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