/**
    * 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.querymatcher;
  
  import java.io.IOException;
  
  import org.apache.hadoop.hbase.Cell;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.client.Scan;
  import org.apache.hadoop.hbase.regionserver.ScanInfo;
  
  /**
   * Query matcher for raw scan.
   */
  @InterfaceAudience.Private
  public abstract class RawScanQueryMatcher extends UserScanQueryMatcher {
  
    protected RawScanQueryMatcher(Scan scan, ScanInfo scanInfo, ColumnTracker columns,
        boolean hasNullColumn, long oldestUnexpiredTS, long now) {
      super(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS, now);
    }
  
    @Override
    public MatchCode match(Cell cell) throws IOException {
      if (filter != null && filter.filterAllRemaining()) {
        return MatchCode.DONE_SCAN;
      }
      MatchCode returnCode = preCheck(cell);
      if (returnCode != null) {
        return returnCode;
      }
      long timestamp = cell.getTimestamp();
      byte typeByte = cell.getTypeByte();
      // For a raw scan, we do not filter out any cells by delete marker, and delete marker is also
      // returned, so we do not need to track delete.
      return matchColumn(cell, timestamp, typeByte);
    }
  
    @Override
    protected void reset() {
    }
  
    @Override
    protected boolean isGet() {
      return false;
    }
  
    public static RawScanQueryMatcher create(Scan scan, ScanInfo scanInfo, ColumnTracker columns,
        boolean hasNullColumn, long oldestUnexpiredTS, long now) {
      if (scan.isReversed()) {
        if (scan.includeStopRow()) {
          return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
              now) {
  
            @Override
            protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
              return cmpToStopRow >= 0;
            }
          };
        } else {
          return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
              now) {
  
            @Override
            protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
              return cmpToStopRow > 0;
            }
          };
        }
      } else {
        if (scan.includeStopRow()) {
          return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
              now) {
  
            @Override
            protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
              return cmpToStopRow <= 0;
            }
          };
        } else {
          return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
              now) {
  
            @Override
           protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
             return cmpToStopRow < 0;
           }
         };
       }
     }
   }
 }