/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.nifi.controller.status.history.questdb;

import org.apache.nifi.controller.status.history.GarbageCollectionStatus;
import org.apache.nifi.controller.status.history.StandardGarbageCollectionStatus;
import org.apache.nifi.questdb.QueryResultProcessor;
import org.apache.nifi.questdb.QueryRowContext;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * Special handling for garbage collection status is necessary due to its immutable nature: all the state attributes
 * are needed at the time of creation.
 */
final class GarbageCollectionResultProcessor implements QueryResultProcessor<List<GarbageCollectionStatus>> {
    private final List<GarbageCollectionStatus> result = new ArrayList<>();

    @Override
    public void processRow(final QueryRowContext context) {
        result.add(new StandardGarbageCollectionStatus(
            context.getString(1),
            new Date(context.getTimestamp(0)),
            context.getLong(2),
            context.getLong(3)
        ));
    }

    @Override
    public List<GarbageCollectionStatus> getResult() {
        return result;
    }
}
