/*
 * 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.prioritizer;

import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.flowfile.FlowFilePrioritizer;

import java.util.Comparator;

public class NewestFlowFileFirstPrioritizer implements FlowFilePrioritizer {

    private static final Comparator<FlowFile> composedComparator = Comparator.nullsLast(
            Comparator
                    .comparingLong(FlowFile::getLineageStartDate)
                    .thenComparingLong(FlowFile::getLineageStartIndex)
                    .reversed()
    );

    @Override
    public int compare(final FlowFile o1, final FlowFile o2) {
        return composedComparator.compare(o1, o2);
    }
}
