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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.util.function.Supplier;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.hamcrest.Description;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.hamcrest.Matcher;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.hamcrest.StringDescription;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span><a name="line.25"></a> |
| <span class="sourceLineNo">026</span>/**<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> * An implementation of {@link Waiter.ExplainingPredicate} that uses Hamcrest {@link Matcher} for<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * both predicate evaluation and explanation.<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> *<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * @param <T> The type of value to be evaluated via {@link Matcher}.<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 class MatcherPredicate<T> implements Waiter.ExplainingPredicate<RuntimeException> {<a name="line.33"></a> |
| <span class="sourceLineNo">034</span><a name="line.34"></a> |
| <span class="sourceLineNo">035</span> private final String reason;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> private final Supplier<T> supplier;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> private final Matcher<? super T> matcher;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> private T currentValue;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> public MatcherPredicate(final Supplier<T> supplier, final Matcher<? super T> matcher) {<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> this("", supplier, matcher);<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> }<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public MatcherPredicate(final String reason, final Supplier<T> supplier,<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> final Matcher<? super T> matcher) {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> this.reason = reason;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> this.supplier = supplier;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> this.matcher = matcher;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> this.currentValue = null;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> }<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> @Override public boolean evaluate() {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> currentValue = supplier.get();<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> return matcher.matches(currentValue);<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<a name="line.55"></a> |
| <span class="sourceLineNo">056</span><a name="line.56"></a> |
| <span class="sourceLineNo">057</span> @Override public String explainFailure() {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> final Description description = new StringDescription()<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> .appendText(reason)<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> .appendText("\nExpected: ").appendDescriptionOf(matcher)<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> .appendText("\n but: ");<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> matcher.describeMismatch(currentValue, description);<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> return description.toString();<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> }<a name="line.64"></a> |
| <span class="sourceLineNo">065</span>}<a name="line.65"></a> |
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