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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Copyright The Apache Software Foundation<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> *<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * contributor license agreements. See the NOTICE file distributed with this<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * work for additional information regarding copyright ownership. The ASF<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * licenses this file to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance with the License.<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * License for the specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.regionserver;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.commons.lang3.NotImplementedException;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.Cell;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>/**<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * A "non-reversed &amp; non-lazy" scanner which does not support backward scanning<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * and always does a real seek operation. Most scanners are inherited from this<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * class.<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> */<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>@InterfaceAudience.Private<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>public abstract class NonReversedNonLazyKeyValueScanner extends<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> NonLazyKeyValueScanner {<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span> @Override<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> public boolean backwardSeek(Cell key) throws IOException {<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> throw new NotImplementedException("backwardSeek must not be called on a "<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> + "non-reversed scanner");<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> }<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> @Override<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> public boolean seekToPreviousRow(Cell key) throws IOException {<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> throw new NotImplementedException("seekToPreviousRow must not be called on a "<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> + "non-reversed scanner");<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> }<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> @Override<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> public boolean seekToLastRow() throws IOException {<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> throw new NotImplementedException("seekToLastRow must not be called on a "<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> + "non-reversed scanner");<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> }<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span>}<a name="line.54"></a> |
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