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

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Here is the source code for com.google.gerrit.server.query.change.FuzzyTopicPredicate.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 static com.google.gerrit.server.index.change.ChangeField.FUZZY_TOPIC;

import com.google.common.collect.Iterables;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.server.index.change.ChangeIndex;
import com.google.gerrit.server.index.change.IndexedChangeQuery;
import com.google.gerrit.server.query.Predicate;
import com.google.gerrit.server.query.QueryParseException;
import com.google.gwtorm.server.OrmException;

class FuzzyTopicPredicate extends ChangeIndexPredicate {
    private final ChangeIndex index;

    FuzzyTopicPredicate(String topic, ChangeIndex index) {
        super(FUZZY_TOPIC, topic);
        this.index = index;
    }

    @Override
    public boolean match(final ChangeData cd) throws OrmException {
        Change change = cd.change();
        if (change == null) {
            return false;
        }
        String t = change.getTopic();
        if (t == null) {
            return false;
        }
        try {
            Predicate<ChangeData> thisId = new LegacyChangeIdPredicate(cd.getId());
            Iterable<ChangeData> results = index.getSource(and(thisId, this), IndexedChangeQuery.oneResult())
                    .read();
            return !Iterables.isEmpty(results);
        } catch (QueryParseException e) {
            throw new OrmException(e);
        }
    }

    @Override
    public int getCost() {
        return 1;
    }
}