3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 package org
.apache
.hadoop
.hbase
.regionserver
;
21 import java
.io
.IOException
;
23 import org
.apache
.commons
.lang3
.NotImplementedException
;
24 import org
.apache
.yetus
.audience
.InterfaceAudience
;
25 import org
.apache
.hadoop
.fs
.Path
;
26 import org
.apache
.hadoop
.hbase
.Cell
;
27 import org
.apache
.hadoop
.hbase
.client
.Scan
;
30 * A "non-lazy" scanner which always does a real seek operation. Most scanners
31 * are inherited from this class.
33 @InterfaceAudience.Private
34 public abstract class NonLazyKeyValueScanner
implements KeyValueScanner
{
37 public boolean requestSeek(Cell kv
, boolean forward
, boolean useBloom
)
39 return doRealSeek(this, kv
, forward
);
43 public boolean realSeekDone() {
48 public void enforceSeek() throws IOException
{
49 throw new NotImplementedException("enforceSeek must not be called on a " +
53 public static boolean doRealSeek(KeyValueScanner scanner
,
54 Cell kv
, boolean forward
) throws IOException
{
55 return forward ? scanner
.reseek(kv
) : scanner
.seek(kv
);
59 public boolean shouldUseScanner(Scan scan
, HStore store
, long oldestUnexpiredTS
) {
60 // No optimizations implemented by default.
65 public boolean isFileScanner() {
66 // Not a file by default.
72 public Path
getFilePath() {
73 // Not a file by default.
78 public Cell
getNextIndexedKey() {
83 public void shipped() throws IOException
{