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| <pre><span class="sourceLineNo">001</span>package org.apache.archiva.components.graph.base;<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 org.apache.archiva.components.graph.api.Edge;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.archiva.components.graph.api.Graph;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.archiva.components.graph.api.Node;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.archiva.components.graph.api.RelationType;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.archiva.components.graph.api.StandardRelationType;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.slf4j.Logger;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.slf4j.LoggerFactory;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.ArrayList;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.util.Collections;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.util.List;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.util.Set;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import java.util.TreeMap;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import java.util.UUID;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import java.util.stream.Collectors;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span>/**<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * Abstract implementation of a directed graph<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> *<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * @param <V> The node implementation.<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> */<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>public abstract class DirectedGraph<V extends Node<V>> implements Graph<V><a name="line.43"></a> |
| <span class="sourceLineNo">044</span>{<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private static final Logger log = LoggerFactory.getLogger( DirectedGraph.class );<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> protected TreeMap<String, V> nodes = new TreeMap<>( );<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> protected TreeMap<String, Edge<V>> edges = new TreeMap<>( );<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> @Override<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> public V newNode( String label )<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> V node = createNewNode( );<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> node.setLabel( label );<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> this.nodes.put( node.getId( ), node );<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> return node;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> }<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> @Override<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> public V addNode( String id, String label )<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> V node;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> if ( nodes.containsKey( id ) )<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> {<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> node = nodes.get( id );<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> }<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> else<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> node = createNewNode( id );<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> this.nodes.put( id, node );<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> }<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> node.setLabel( label );<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> return node;<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> protected V createNewNode( )<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> return createNewNode( UUID.randomUUID( ).toString( ) );<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> }<a name="line.81"></a> |
| <span class="sourceLineNo">082</span><a name="line.82"></a> |
| <span class="sourceLineNo">083</span> /**<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> * Subclasses that implement this method must return a new node instance for<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> * each call. The node should not be connected with any edges.<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> *<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> * @return A new node instance.<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> */<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> abstract V createNewNode( String id );<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> * Creates a new edge instance on each method call. The id will be a generated UUID.<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> *<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> * @param type the relation type<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * @param sourceNode the source node<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> * @param destinationNode the destination node<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> * @return the new edge instance<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> */<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> protected Edge<V> createNewEdge( RelationType type, V sourceNode, V destinationNode )<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> {<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> return createNewEdge( type, UUID.randomUUID( ).toString( ), sourceNode, destinationNode );<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span><a name="line.103"></a> |
| <span class="sourceLineNo">104</span><a name="line.104"></a> |
| <span class="sourceLineNo">105</span> /**<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * Subclasses that implement this method must return a new instance of the edge with<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * the given source and destination nodes. The nodes must be linked by the new<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> * edge.<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> *<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> * @param type the type of the edge<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> * @param id the id of the new edge<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> * @param sourceNode the source node<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> * @param destinationNode the destination node<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> * @return A new edge instance.<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> */<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> abstract Edge<V> createNewEdge( RelationType type, String id, V sourceNode, V destinationNode );<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> @Override<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> public Edge<V> newEdge( String label, V sourceNode, V destinationNode )<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> {<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> return newEdge( StandardRelationType.DEFAULT, label, sourceNode, destinationNode );<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> }<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> @Override<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> public Edge<V> newEdge( RelationType type, String label, V sourceNode, V destinationNode )<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> if ( sourceNode == null )<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> throw new IllegalArgumentException( "Source node may not be null" );<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> }<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> if ( destinationNode == null )<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> throw new IllegalArgumentException( "Destination node may not be null" );<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> }<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> Edge<V> edge = createNewEdge( type, sourceNode, destinationNode );<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> edge.setLabel( label );<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> this.edges.put( edge.getId( ), edge );<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> return edge;<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> }<a name="line.140"></a> |
| <span class="sourceLineNo">141</span><a name="line.141"></a> |
| <span class="sourceLineNo">142</span> @Override<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> public Edge<V> addEdge( final RelationType type, final String id, final String label,<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> final V sourceNode, final V destinationNode ) throws IllegalArgumentException<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> if ( sourceNode == null )<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> throw new IllegalArgumentException( "Source node may not be null" );<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> }<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> if ( destinationNode == null )<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> {<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> throw new IllegalArgumentException( "Destination node may not be null" );<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> }<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> Edge<V> edge;<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> if ( this.edges.containsKey( id ) )<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> log.debug( "Edge found " + id );<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> edge = this.edges.get( id );<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> }<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> else<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> edge = createNewEdge( type, id, sourceNode, destinationNode );<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> this.edges.put( id, edge );<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> edge.setLabel( label );<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> log.debug( "Adding edge " + edge.toString( ) );<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> return edge;<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> }<a name="line.168"></a> |
| <span class="sourceLineNo">169</span><a name="line.169"></a> |
| <span class="sourceLineNo">170</span> @Override<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> public Edge<V> addEdge( String id, String label, V sourceNode, V destinationNode ) throws IllegalArgumentException<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> return addEdge( StandardRelationType.DEFAULT, id, label, sourceNode, destinationNode );<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> }<a name="line.174"></a> |
| <span class="sourceLineNo">175</span><a name="line.175"></a> |
| <span class="sourceLineNo">176</span> @Override<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> public V getNode( String id )<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> return nodes.get( id );<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> }<a name="line.180"></a> |
| <span class="sourceLineNo">181</span><a name="line.181"></a> |
| <span class="sourceLineNo">182</span> @Override<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> public Edge<V> getEdge( String id )<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> {<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> return edges.get( id );<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> }<a name="line.186"></a> |
| <span class="sourceLineNo">187</span><a name="line.187"></a> |
| <span class="sourceLineNo">188</span> @Override<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> public Set<V> getNodes( )<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> {<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> return nodes.values( ).stream( ).collect( Collectors.toSet( ) );<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> }<a name="line.192"></a> |
| <span class="sourceLineNo">193</span><a name="line.193"></a> |
| <span class="sourceLineNo">194</span> @Override<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> public List<V> findNodes( String query )<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> {<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> return Collections.EMPTY_LIST;<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> }<a name="line.198"></a> |
| <span class="sourceLineNo">199</span><a name="line.199"></a> |
| <span class="sourceLineNo">200</span> @Override<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> public void removeNode( V node )<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> {<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> List<Edge<V>> rmEdges = new ArrayList<>( node.getInEdges( ) );<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> for ( Edge<V> edge : rmEdges )<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> {<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> removeEdge( edge );<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> }<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> rmEdges = new ArrayList<>( node.getOutEdges( ) );<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> for ( Edge<V> edge : rmEdges )<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> {<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> removeEdge( edge );<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> }<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> nodes.remove( node.getId( ) );<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> }<a name="line.214"></a> |
| <span class="sourceLineNo">215</span><a name="line.215"></a> |
| <span class="sourceLineNo">216</span> @Override<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> public void removeEdge( Edge<V> edge )<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> {<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> edges.remove( edge.getId( ) );<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> }<a name="line.220"></a> |
| <span class="sourceLineNo">221</span><a name="line.221"></a> |
| <span class="sourceLineNo">222</span>}<a name="line.222"></a> |
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