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// Copyright (C) 2013 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.api.changes;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static com.google.gerrit.server.api.ApiUtil.asRestApiException;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.gerrit.extensions.api.changes.ChangeApi;
import com.google.gerrit.extensions.api.changes.Changes;
import com.google.gerrit.extensions.client.ListChangesOption;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.common.ChangeInput;
import com.google.gerrit.extensions.restapi.IdString;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.TopLevelResource;
import com.google.gerrit.extensions.restapi.Url;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.server.change.ChangesCollection;
import com.google.gerrit.server.change.CreateChange;
import com.google.gerrit.server.query.change.QueryChanges;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.util.List;
@Singleton
class ChangesImpl implements Changes {
private final ChangesCollection changes;
private final ChangeApiImpl.Factory api;
private final CreateChange createChange;
private final Provider<QueryChanges> queryProvider;
@Inject
ChangesImpl(
ChangesCollection changes,
ChangeApiImpl.Factory api,
CreateChange createChange,
Provider<QueryChanges> queryProvider) {
this.changes = changes;
this.api = api;
this.createChange = createChange;
this.queryProvider = queryProvider;
}
@Override
public ChangeApi id(int id) throws RestApiException {
return id(String.valueOf(id));
}
@Override
public ChangeApi id(String project, String branch, String id) throws RestApiException {
return id(
Joiner.on('~')
.join(ImmutableList.of(Url.encode(project), Url.encode(branch), Url.encode(id))));
}
@Override
public ChangeApi id(String id) throws RestApiException {
try {
return api.create(changes.parse(TopLevelResource.INSTANCE, IdString.fromUrl(id)));
} catch (Exception e) {
throw asRestApiException("Cannot parse change", e);
}
}
@Override
public ChangeApi id(String project, int id) throws RestApiException {
return id(
Joiner.on('~').join(ImmutableList.of(Url.encode(project), Url.encode(String.valueOf(id)))));
}
@Override
public ChangeApi create(ChangeInput in) throws RestApiException {
try {
ChangeInfo out = createChange.apply(TopLevelResource.INSTANCE, in).value();
return api.create(changes.parse(new Change.Id(out._number)));
} catch (Exception e) {
throw asRestApiException("Cannot create change", e);
}
}
@Override
public QueryRequest query() {
return new QueryRequest() {
@Override
public List<ChangeInfo> get() throws RestApiException {
return ChangesImpl.this.get(this);
}
};
}
@Override
public QueryRequest query(String query) {
return query().withQuery(query);
}
private List<ChangeInfo> get(QueryRequest q) throws RestApiException {
QueryChanges qc = queryProvider.get();
if (q.getQuery() != null) {
qc.addQuery(q.getQuery());
}
qc.setLimit(q.getLimit());
qc.setStart(q.getStart());
for (ListChangesOption option : q.getOptions()) {
qc.addOption(option);
}
try {
List<?> result = qc.apply(TopLevelResource.INSTANCE);
if (result.isEmpty()) {
return ImmutableList.of();
}
// Check type safety of result; the extension API should be safer than the
// REST API in this case, since it's intended to be used in Java.
Object first = checkNotNull(result.iterator().next());
checkState(first instanceof ChangeInfo);
@SuppressWarnings("unchecked")
List<ChangeInfo> infos = (List<ChangeInfo>) result;
return ImmutableList.copyOf(infos);
} catch (Exception e) {
throw asRestApiException("Cannot query changes", e);
}
}
}
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