com.google.gerrit.server.index.account.AccountIndexRewriter Maven / Gradle / Ivy
// 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.index.account;
import static java.util.Objects.requireNonNull;
import com.google.gerrit.index.IndexConfig;
import com.google.gerrit.index.IndexRewriter;
import com.google.gerrit.index.QueryOptions;
import com.google.gerrit.index.query.IndexPredicate;
import com.google.gerrit.index.query.Predicate;
import com.google.gerrit.index.query.QueryParseException;
import com.google.gerrit.index.query.TooManyTermsInQueryException;
import com.google.gerrit.server.account.AccountState;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import org.eclipse.jgit.util.MutableInteger;
/** Rewriter for the account index. See {@link IndexRewriter} for details. */
@Singleton
public class AccountIndexRewriter implements IndexRewriter {
private final AccountIndexCollection indexes;
private final IndexConfig config;
@Inject
AccountIndexRewriter(AccountIndexCollection indexes, IndexConfig config) {
this.indexes = indexes;
this.config = config;
}
@Override
public Predicate rewrite(Predicate in, QueryOptions opts)
throws QueryParseException {
AccountIndex index = indexes.getSearchIndex();
requireNonNull(index, "no active search index configured for accounts");
validateMaxTermsInQuery(in);
return new IndexedAccountQuery(index, in, opts);
}
/**
* Validates whether a query has too many terms.
*
* @param predicate the predicate for which the leaf predicates should be counted
* @throws QueryParseException thrown if the query has too many terms
*/
public void validateMaxTermsInQuery(Predicate predicate)
throws QueryParseException {
MutableInteger leafTerms = new MutableInteger();
countLeafTerms(predicate, leafTerms);
if (leafTerms.value > config.maxTerms()) {
throw new TooManyTermsInQueryException(leafTerms.value, config.maxTerms());
}
}
private void countLeafTerms(Predicate predicate, MutableInteger leafTerms) {
if (predicate instanceof IndexPredicate) {
++leafTerms.value;
}
for (Predicate childPredicate : predicate.getChildren()) {
countLeafTerms(childPredicate, leafTerms);
}
}
}