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/*
 * 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.hadoop.hbase.regionserver;

import java.io.IOException;
import java.util.NavigableSet;

import org.apache.hadoop.hbase.KeepDeletedCells;
import org.apache.hadoop.hbase.client.Scan;

public class ScanInfoUtil {
    private ScanInfoUtil() {
    }
    
    public static boolean isKeepDeletedCells(ScanInfo scanInfo) {
        return scanInfo.getKeepDeletedCells() != KeepDeletedCells.FALSE;
    }
    
    public static ScanInfo cloneScanInfoWithKeepDeletedCells(ScanInfo scanInfo) {
        return new ScanInfo(scanInfo.getConfiguration(), scanInfo.getFamily(), Math.max(scanInfo.getMinVersions(), 1),
                    scanInfo.getMaxVersions(), scanInfo.getTtl(), KeepDeletedCells.TRUE,
                    scanInfo.getTimeToPurgeDeletes(), scanInfo.getComparator());
    }

    public static StoreScanner createStoreScanner(Store store, ScanInfo scanInfo, Scan scan, final NavigableSet columns,long readPt) throws IOException {
        if(!scan.isReversed()) {
            return new StoreScanner(store, scanInfo, scan, columns,readPt);
        } else {
            return new ReversedStoreScanner(store, scanInfo, scan, columns,readPt);
        }
    }
}