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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.restapi.change;
import com.google.common.collect.Iterables;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.extensions.client.ListChangesOption;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.extensions.restapi.TopLevelResource;
import com.google.gerrit.index.query.QueryParseException;
import com.google.gerrit.index.query.QueryRequiresAuthException;
import com.google.gerrit.index.query.QueryResult;
import com.google.gerrit.server.DynamicOptions;
import com.google.gerrit.server.change.ChangeJson;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.ChangeQueryBuilder;
import com.google.gerrit.server.query.change.ChangeQueryProcessor;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import java.util.ArrayList;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
import org.kohsuke.args4j.Option;
public class QueryChanges implements RestReadView<TopLevelResource>, DynamicOptions.BeanReceiver {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final ChangeJson.Factory json;
private final ChangeQueryBuilder qb;
private final ChangeQueryProcessor imp;
private EnumSet<ListChangesOption> options;
@Option(
name = "--query",
aliases = {"-q"},
metaVar = "QUERY",
usage = "Query string")
private List<String> queries;
@Option(
name = "--limit",
aliases = {"-n"},
metaVar = "CNT",
usage = "Maximum number of results to return")
public void setLimit(int limit) {
imp.setUserProvidedLimit(limit);
}
@Option(name = "-o", usage = "Output options per change")
public void addOption(ListChangesOption o) {
options.add(o);
}
@Option(name = "-O", usage = "Output option flags, in hex")
void setOptionFlagsHex(String hex) {
options.addAll(ListChangesOption.fromBits(Integer.parseInt(hex, 16)));
}
@Option(
name = "--start",
aliases = {"-S"},
metaVar = "CNT",
usage = "Number of changes to skip")
public void setStart(int start) {
imp.setStart(start);
}
@Override
public void setDynamicBean(String plugin, DynamicOptions.DynamicBean dynamicBean) {
imp.setDynamicBean(plugin, dynamicBean);
}
@Inject
QueryChanges(ChangeJson.Factory json, ChangeQueryBuilder qb, ChangeQueryProcessor qp) {
this.json = json;
this.qb = qb;
this.imp = qp;
options = EnumSet.noneOf(ListChangesOption.class);
}
public void addQuery(String query) {
if (queries == null) {
queries = new ArrayList<>();
}
queries.add(query);
}
public String getQuery(int i) {
return queries.get(i);
}
@Override
public List<?> apply(TopLevelResource rsrc)
throws BadRequestException, AuthException, OrmException, PermissionBackendException {
List<List<ChangeInfo>> out;
try {
out = query();
} catch (QueryRequiresAuthException e) {
throw new AuthException("Must be signed-in to use this operator");
} catch (QueryParseException e) {
logger.atFine().withCause(e).log("Reject change query with 400 Bad Request: %s", queries);
throw new BadRequestException(e.getMessage(), e);
}
return out.size() == 1 ? out.get(0) : out;
}
private List<List<ChangeInfo>> query()
throws OrmException, QueryParseException, PermissionBackendException {
if (imp.isDisabled()) {
throw new QueryParseException("query disabled");
}
if (queries == null || queries.isEmpty()) {
queries = Collections.singletonList("status:open");
} else if (queries.size() > 10) {
// Hard-code a default maximum number of queries to prevent
// users from submitting too much to the server in a single call.
throw new QueryParseException("limit of 10 queries");
}
int cnt = queries.size();
List<QueryResult<ChangeData>> results = imp.query(qb.parse(queries));
List<List<ChangeInfo>> res = json.create(options, this.imp).format(results);
for (int n = 0; n < cnt; n++) {
List<ChangeInfo> info = res.get(n);
if (results.get(n).more() && !info.isEmpty()) {
Iterables.getLast(info)._moreChanges = true;
}
}
return res;
}
}
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