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| <pre><span class="sourceLineNo">001</span>package org.apache.archiva.event;<a name="line.1"></a> |
| <span class="sourceLineNo">002</span><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<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * or more contributor license agreements. See the NOTICE file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * distributed with this work for additional information<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * regarding copyright ownership. The ASF licenses this file<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * to you under the Apache License, Version 2.0 (the<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * "License"); you may not use this file except in compliance<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * with the License. You may obtain a copy of the License at<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> *<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * Unless required by applicable law or agreed to in writing,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * software distributed under the License is distributed on an<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * KIND, either express or implied. See the License for the<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> * specific language governing permissions and limitations<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> * under the License.<a name="line.19"></a> |
| <span class="sourceLineNo">020</span> */<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.time.LocalDateTime;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.EventObject;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>/**<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * Base class for events. Events have a type and a source.<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> * The source is the instance that raised the event.<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> *<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * There are different event types for a given event. The types are represented in a hierarchical structure.<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> *<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * Events can be chained, which means a event listener can catch events and rethrow them as its own event.<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> *<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> */<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>public class Event extends EventObject implements Cloneable {<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span> private static final long serialVersionUID = -7171846575892044990L;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span> public static final EventType<Event> ANY = EventType.ROOT;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> private Event previous;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> private final EventType<? extends Event> type;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private final LocalDateTime createTime;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span><a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public Event(EventType<? extends Event> type, Object originator) {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> super(originator);<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> this.type = type;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> this.createTime = LocalDateTime.now();<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> }<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private Event(Event previous, Object originator) {<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> super(originator);<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> this.previous = previous;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> this.type = previous.getType();<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> this.createTime = previous.getCreateTime();<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> /**<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * Returns the event type that is associated with this event instance.<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * @return the event type<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> */<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> public EventType<? extends Event> getType() {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> return type;<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> };<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> |
| <span class="sourceLineNo">066</span> * Returns the time, when the event was created.<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * @return<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> */<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> public LocalDateTime getCreateTime() {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> return createTime;<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> }<a name="line.71"></a> |
| <span class="sourceLineNo">072</span><a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> /**<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * Recreates the event with the given instance as the new source. The<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * current source is stored in the previous event.<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * @param newSource The new source<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * @return a new event instance, where <code>this</code> is stored as previous event<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> */<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> public Event copyFor(Object newSource) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> Event newEvent = (Event) this.clone();<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> newEvent.previous = this;<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> newEvent.source = newSource;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> return newEvent;<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> /**<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> * Returns the previous event or <code>null</code>, if this is a root event.<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> * @return the previous event or <code>null</code>, if it does not exist<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> */<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> public Event getPreviousEvent() {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> return previous;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> }<a name="line.93"></a> |
| <span class="sourceLineNo">094</span><a name="line.94"></a> |
| <span class="sourceLineNo">095</span> /**<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> * Returns <code>true</code>, if the event has a previous event.<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> * @return <code>true</code>, if this has a previous event, otherwise <code>false</code><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> */<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> public boolean hasPreviousEvent() {<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> return previous!=null;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> }<a name="line.101"></a> |
| <span class="sourceLineNo">102</span><a name="line.102"></a> |
| <span class="sourceLineNo">103</span> @Override<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> protected Object clone() {<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> try {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> return super.clone();<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> } catch (CloneNotSupportedException e) {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> // this should not happen<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> throw new RuntimeException("Event is not clonable");<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> }<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> }<a name="line.111"></a> |
| <span class="sourceLineNo">112</span>}<a name="line.112"></a> |
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| </pre> |
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