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| <pre><span class="sourceLineNo">001</span>package org.apache.archiva.components.graph.api;<a name="line.1"></a> |
| <span class="sourceLineNo">002</span>/*<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * 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<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. 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,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * software distributed under the License is distributed on an<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * KIND, either express or implied. See the License for the<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * specific language governing permissions and limitations<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> * under the License.<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> */<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.ArrayList;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.List;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>/**<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> * This class gives information about the status of the graph traversal.<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * It holds the errors encountered and information about detected cycles.<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> *<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * @param <V><a name="line.28"></a> |
| <span class="sourceLineNo">029</span> */<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>public class TraversalStatus<V extends Node<V>><a name="line.30"></a> |
| <span class="sourceLineNo">031</span>{<a name="line.31"></a> |
| <span class="sourceLineNo">032</span><a name="line.32"></a> |
| <span class="sourceLineNo">033</span> private int cycles = 0;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> private List<VisitError<V>> errorList;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> private List<V> cycleNodes;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> public TraversalStatus( )<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> {<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><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> /**<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Returns the list of errors<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> *<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * @return a list of errors encountered while executing the consumer function on nodes<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> */<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> public List<VisitError<V>> getErrorList( )<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> {<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> return errorList;<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> /**<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * Returns true, if there were errors while running the consumer function.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> *<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * @return true, if errors occured on the consumer function, otherwise false<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> */<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public boolean hasErrors( )<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> {<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> return errorList != null && errorList.size( ) > 0;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> }<a name="line.60"></a> |
| <span class="sourceLineNo">061</span><a name="line.61"></a> |
| <span class="sourceLineNo">062</span> /**<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * Add the given error to the list.<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> *<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * @param node the node, where the error occurred<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * @param e the exception<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> */<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> public void addError( V node, Throwable e )<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> if ( errorList == null )<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> errorList = new ArrayList<>( );<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> }<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> errorList.add( new VisitError( node, e ) );<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> }<a name="line.75"></a> |
| <span class="sourceLineNo">076</span><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> /**<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * Add another cycle to the counter<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> *<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * @param node<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> */<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> public void registerCycle( V node )<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> cycles++;<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> if ( cycleNodes == null )<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> cycleNodes = new ArrayList<>( );<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> cycleNodes.add( node );<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> }<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> /**<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> * Returns true, if the traversal encountered a cycle.<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> *<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * @return true, if cycle was encountered, otherwise false<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> */<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> public boolean hasCycles( )<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> return cycles > 0;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> }<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> * Returns the number of detected cycles.<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> *<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * @return the number of cycles<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> */<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> public int getCycleCount( )<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> {<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> return cycles;<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> |
| <span class="sourceLineNo">113</span> * Returns the nodes, where cycles were detected. The list may contain<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> * duplicated entries, if cycles where detected on different paths.<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> *<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> * @return the list of nodes where cycles were detected<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> */<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> public List<V> getCycleNodes( )<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> return cycleNodes;<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> }<a name="line.121"></a> |
| <span class="sourceLineNo">122</span>}<a name="line.122"></a> |
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| </pre> |
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