001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.regionserver.querymatcher;
019
020import java.io.IOException;
021import org.apache.hadoop.hbase.ExtendedCell;
022import org.apache.hadoop.hbase.client.Scan;
023import org.apache.hadoop.hbase.regionserver.ScanInfo;
024import org.apache.yetus.audience.InterfaceAudience;
025
026/**
027 * Query matcher for raw scan.
028 */
029@InterfaceAudience.Private
030public abstract class RawScanQueryMatcher extends UserScanQueryMatcher {
031
032  protected RawScanQueryMatcher(Scan scan, ScanInfo scanInfo, ColumnTracker columns,
033    boolean hasNullColumn, long oldestUnexpiredTS, long now) {
034    super(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS, now);
035  }
036
037  @Override
038  public MatchCode match(ExtendedCell cell) throws IOException {
039    if (filter != null && filter.filterAllRemaining()) {
040      return MatchCode.DONE_SCAN;
041    }
042    MatchCode returnCode = preCheck(cell);
043    if (returnCode != null) {
044      return returnCode;
045    }
046    long timestamp = cell.getTimestamp();
047    byte typeByte = cell.getTypeByte();
048    // For a raw scan, we do not filter out any cells by delete marker, and delete marker is also
049    // returned, so we do not need to track delete.
050    return matchColumn(cell, timestamp, typeByte);
051  }
052
053  @Override
054  protected void reset() {
055  }
056
057  @Override
058  protected boolean isGet() {
059    return false;
060  }
061
062  public static RawScanQueryMatcher create(Scan scan, ScanInfo scanInfo, ColumnTracker columns,
063    boolean hasNullColumn, long oldestUnexpiredTS, long now) {
064    if (scan.isReversed()) {
065      if (scan.includeStopRow()) {
066        return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
067          now) {
068
069          @Override
070          protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
071            return cmpToStopRow >= 0;
072          }
073        };
074      } else {
075        return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
076          now) {
077
078          @Override
079          protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
080            return cmpToStopRow > 0;
081          }
082        };
083      }
084    } else {
085      if (scan.includeStopRow()) {
086        return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
087          now) {
088
089          @Override
090          protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
091            return cmpToStopRow <= 0;
092          }
093        };
094      } else {
095        return new RawScanQueryMatcher(scan, scanInfo, columns, hasNullColumn, oldestUnexpiredTS,
096          now) {
097
098          @Override
099          protected boolean moreRowsMayExistsAfter(int cmpToStopRow) {
100            return cmpToStopRow < 0;
101          }
102        };
103      }
104    }
105  }
106}