com.google.gerrit.server.query.change.IsStarredByPredicate.java Source code

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Here is the source code for com.google.gerrit.server.query.change.IsStarredByPredicate.java

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// Copyright (C) 2010 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.query.change;

import com.google.common.collect.Lists;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.index.Schema;
import com.google.gerrit.server.query.OrPredicate;
import com.google.gerrit.server.query.Predicate;
import com.google.gerrit.server.query.QueryParseException;
import com.google.gerrit.server.query.change.ChangeQueryBuilder.Arguments;
import com.google.gwtorm.server.OrmException;
import com.google.gwtorm.server.ResultSet;

import java.util.List;
import java.util.Set;

class IsStarredByPredicate extends OrPredicate<ChangeData> implements ChangeDataSource {
    private static String describe(CurrentUser user) {
        if (user.isIdentifiedUser()) {
            return user.getAccountId().toString();
        }
        return user.toString();
    }

    private static List<Predicate<ChangeData>> predicates(Schema<ChangeData> schema, Set<Change.Id> ids) {
        List<Predicate<ChangeData>> r = Lists.newArrayListWithCapacity(ids.size());
        for (Change.Id id : ids) {
            r.add(new LegacyChangeIdPredicate(schema, id));
        }
        return r;
    }

    private final Arguments args;
    private final CurrentUser user;

    IsStarredByPredicate(Arguments args) throws QueryParseException {
        this(args, args.getIdentifiedUser());
    }

    private IsStarredByPredicate(Arguments args, IdentifiedUser user) {
        super(predicates(args.getSchema(), user.getStarredChanges()));
        this.args = args;
        this.user = user;
    }

    @Override
    public boolean match(final ChangeData object) {
        return user.getStarredChanges().contains(object.getId());
    }

    @Override
    public ResultSet<ChangeData> read() throws OrmException {
        return ChangeDataResultSet.change(args.changeDataFactory, args.db,
                args.db.get().changes().get(user.getStarredChanges()));
    }

    @Override
    public boolean hasChange() {
        return true;
    }

    @Override
    public int getCardinality() {
        return 10;
    }

    @Override
    public int getCost() {
        return 0;
    }

    @Override
    public String toString() {
        String val = describe(user);
        if (val.indexOf(' ') < 0) {
            return ChangeQueryBuilder.FIELD_STARREDBY + ":" + val;
        } else {
            return ChangeQueryBuilder.FIELD_STARREDBY + ":\"" + val + "\"";
        }
    }
}