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Posted to commits@commonsrdf.apache.org by st...@apache.org on 2016/11/17 14:24:55 UTC
svn commit: r1001275 [19/22] - in /websites/staging/commonsrdf/trunk: ./
apidocs/ apidocs/org/apache/commons/rdf/api/
apidocs/org/apache/commons/rdf/api/class-use/
apidocs/org/apache/commons/rdf/experimental/
apidocs/org/apache/commons/rdf/experimental...
Added: websites/staging/commonsrdf/trunk/testapidocs/src-html/org/apache/commons/rdf/api/AbstractDatasetTest.html
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--- websites/staging/commonsrdf/trunk/testapidocs/src-html/org/apache/commons/rdf/api/AbstractDatasetTest.html (added)
+++ websites/staging/commonsrdf/trunk/testapidocs/src-html/org/apache/commons/rdf/api/AbstractDatasetTest.html Thu Nov 17 14:24:53 2016
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.commons.rdf.api;<a name="line.18"></a>
+<span class="sourceLineNo">019</span><a name="line.19"></a>
+<span class="sourceLineNo">020</span>import static org.junit.Assert.*;<a name="line.20"></a>
+<span class="sourceLineNo">021</span><a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.util.HashSet;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.Iterator;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.Map;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import java.util.Optional;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import java.util.Set;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.stream.Collectors;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import java.util.stream.Stream;<a name="line.31"></a>
+<span class="sourceLineNo">032</span><a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.junit.Assume;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.Before;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.Test;<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> * Test Dataset implementation<a name="line.38"></a>
+<span class="sourceLineNo">039</span> * <p><a name="line.39"></a>
+<span class="sourceLineNo">040</span> * To add to your implementation's tests, create a subclass with a name ending<a name="line.40"></a>
+<span class="sourceLineNo">041</span> * in <code>Test</code> and provide {@link #createFactory()} which minimally<a name="line.41"></a>
+<span class="sourceLineNo">042</span> * must support {@link RDF#createDataset()} and {@link RDF#createIRI(String)}, but<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * ideally support all operations.<a name="line.43"></a>
+<span class="sourceLineNo">044</span> * <p><a name="line.44"></a>
+<span class="sourceLineNo">045</span> * This test uses try-with-resources blocks for calls to {@link Dataset#stream()}<a name="line.45"></a>
+<span class="sourceLineNo">046</span> * and {@link Dataset#iterate()}.<a name="line.46"></a>
+<span class="sourceLineNo">047</span> * <a name="line.47"></a>
+<span class="sourceLineNo">048</span> * @see Dataset<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * @see RDF<a name="line.49"></a>
+<span class="sourceLineNo">050</span> */<a name="line.50"></a>
+<span class="sourceLineNo">051</span>public abstract class AbstractDatasetTest {<a name="line.51"></a>
+<span class="sourceLineNo">052</span><a name="line.52"></a>
+<span class="sourceLineNo">053</span> protected RDF factory;<a name="line.53"></a>
+<span class="sourceLineNo">054</span> protected Dataset dataset;<a name="line.54"></a>
+<span class="sourceLineNo">055</span> protected IRI alice;<a name="line.55"></a>
+<span class="sourceLineNo">056</span> protected IRI bob;<a name="line.56"></a>
+<span class="sourceLineNo">057</span> protected IRI name;<a name="line.57"></a>
+<span class="sourceLineNo">058</span> protected IRI knows;<a name="line.58"></a>
+<span class="sourceLineNo">059</span> protected IRI member;<a name="line.59"></a>
+<span class="sourceLineNo">060</span> protected BlankNode bnode1;<a name="line.60"></a>
+<span class="sourceLineNo">061</span> protected BlankNode bnode2;<a name="line.61"></a>
+<span class="sourceLineNo">062</span> protected Literal aliceName;<a name="line.62"></a>
+<span class="sourceLineNo">063</span> protected Literal bobName;<a name="line.63"></a>
+<span class="sourceLineNo">064</span> protected Literal secretClubName;<a name="line.64"></a>
+<span class="sourceLineNo">065</span> protected Literal companyName;<a name="line.65"></a>
+<span class="sourceLineNo">066</span> protected Quad bobNameQuad;<a name="line.66"></a>
+<span class="sourceLineNo">067</span> private IRI isPrimaryTopicOf;<a name="line.67"></a>
+<span class="sourceLineNo">068</span> private IRI graph1;<a name="line.68"></a>
+<span class="sourceLineNo">069</span> private BlankNode graph2;<a name="line.69"></a>
+<span class="sourceLineNo">070</span><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> * This method must be overridden by the implementing test to provide a<a name="line.73"></a>
+<span class="sourceLineNo">074</span> * factory for the test to create {@link Dataset}, {@link IRI} etc.<a name="line.74"></a>
+<span class="sourceLineNo">075</span> * <a name="line.75"></a>
+<span class="sourceLineNo">076</span> * @return {@link RDF} instance to be tested.<a name="line.76"></a>
+<span class="sourceLineNo">077</span> */<a name="line.77"></a>
+<span class="sourceLineNo">078</span> protected abstract RDF createFactory();<a name="line.78"></a>
+<span class="sourceLineNo">079</span><a name="line.79"></a>
+<span class="sourceLineNo">080</span> @Before<a name="line.80"></a>
+<span class="sourceLineNo">081</span> public void createDatasetAndAdd() {<a name="line.81"></a>
+<span class="sourceLineNo">082</span> factory = createFactory();<a name="line.82"></a>
+<span class="sourceLineNo">083</span> dataset = factory.createDataset();<a name="line.83"></a>
+<span class="sourceLineNo">084</span> assertEquals(0, dataset.size());<a name="line.84"></a>
+<span class="sourceLineNo">085</span><a name="line.85"></a>
+<span class="sourceLineNo">086</span> graph1 = factory.createIRI("http://example.com/graph1");<a name="line.86"></a>
+<span class="sourceLineNo">087</span> graph2 = factory.createBlankNode();<a name="line.87"></a>
+<span class="sourceLineNo">088</span> <a name="line.88"></a>
+<span class="sourceLineNo">089</span> alice = factory.createIRI("http://example.com/alice");<a name="line.89"></a>
+<span class="sourceLineNo">090</span> bob = factory.createIRI("http://example.com/bob");<a name="line.90"></a>
+<span class="sourceLineNo">091</span> name = factory.createIRI("http://xmlns.com/foaf/0.1/name");<a name="line.91"></a>
+<span class="sourceLineNo">092</span> knows = factory.createIRI("http://xmlns.com/foaf/0.1/knows");<a name="line.92"></a>
+<span class="sourceLineNo">093</span> member = factory.createIRI("http://xmlns.com/foaf/0.1/member");<a name="line.93"></a>
+<span class="sourceLineNo">094</span> bnode1 = factory.createBlankNode("org1");<a name="line.94"></a>
+<span class="sourceLineNo">095</span> bnode2 = factory.createBlankNode("org2");<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span> secretClubName = factory.createLiteral("The Secret Club");<a name="line.97"></a>
+<span class="sourceLineNo">098</span> companyName = factory.createLiteral("A company");<a name="line.98"></a>
+<span class="sourceLineNo">099</span> aliceName = factory.createLiteral("Alice");<a name="line.99"></a>
+<span class="sourceLineNo">100</span> bobName = factory.createLiteral("Bob", "en-US");<a name="line.100"></a>
+<span class="sourceLineNo">101</span><a name="line.101"></a>
+<span class="sourceLineNo">102</span> dataset.add(graph1, alice, name, aliceName);<a name="line.102"></a>
+<span class="sourceLineNo">103</span> dataset.add(graph1, alice, knows, bob);<a name="line.103"></a>
+<span class="sourceLineNo">104</span><a name="line.104"></a>
+<span class="sourceLineNo">105</span> dataset.add(graph1, alice, member, bnode1);<a name="line.105"></a>
+<span class="sourceLineNo">106</span><a name="line.106"></a>
+<span class="sourceLineNo">107</span> bobNameQuad = factory.createQuad(graph2, bob, name, bobName);<a name="line.107"></a>
+<span class="sourceLineNo">108</span> dataset.add(bobNameQuad);<a name="line.108"></a>
+<span class="sourceLineNo">109</span><a name="line.109"></a>
+<span class="sourceLineNo">110</span> dataset.add(factory.createQuad(graph2, bob, member, bnode1));<a name="line.110"></a>
+<span class="sourceLineNo">111</span> dataset.add(factory.createQuad(graph2, bob, member, bnode2));<a name="line.111"></a>
+<span class="sourceLineNo">112</span> // NOTE: bnode1 used in both graph1 and graph2<a name="line.112"></a>
+<span class="sourceLineNo">113</span> dataset.add(graph1, bnode1, name, secretClubName);<a name="line.113"></a>
+<span class="sourceLineNo">114</span> dataset.add(graph2, bnode2, name, companyName);<a name="line.114"></a>
+<span class="sourceLineNo">115</span> <a name="line.115"></a>
+<span class="sourceLineNo">116</span> // default graph describes graph1 and graph2 <a name="line.116"></a>
+<span class="sourceLineNo">117</span> isPrimaryTopicOf = factory.createIRI("http://xmlns.com/foaf/0.1/isPrimaryTopicOf");<a name="line.117"></a>
+<span class="sourceLineNo">118</span> dataset.add(null, alice, isPrimaryTopicOf, graph1);<a name="line.118"></a>
+<span class="sourceLineNo">119</span> dataset.add(null, bob, isPrimaryTopicOf, graph2);<a name="line.119"></a>
+<span class="sourceLineNo">120</span> <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>
+<span class="sourceLineNo">123</span><a name="line.123"></a>
+<span class="sourceLineNo">124</span> @Test<a name="line.124"></a>
+<span class="sourceLineNo">125</span> public void size() throws Exception {<a name="line.125"></a>
+<span class="sourceLineNo">126</span> assertEquals(10, dataset.size());<a name="line.126"></a>
+<span class="sourceLineNo">127</span> }<a name="line.127"></a>
+<span class="sourceLineNo">128</span><a name="line.128"></a>
+<span class="sourceLineNo">129</span> @Test<a name="line.129"></a>
+<span class="sourceLineNo">130</span> public void iterate() throws Exception {<a name="line.130"></a>
+<span class="sourceLineNo">131</span> Assume.assumeTrue(dataset.size() > 0);<a name="line.131"></a>
+<span class="sourceLineNo">132</span> final List<Quad> quads = new ArrayList<>();<a name="line.132"></a>
+<span class="sourceLineNo">133</span> for (final Quad t : dataset.iterate()) {<a name="line.133"></a>
+<span class="sourceLineNo">134</span> quads.add(t);<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
+<span class="sourceLineNo">136</span> assertEquals(dataset.size(), quads.size());<a name="line.136"></a>
+<span class="sourceLineNo">137</span> <a name="line.137"></a>
+<span class="sourceLineNo">138</span> //assertTrue(quads.contains(bobNameQuad));<a name="line.138"></a>
+<span class="sourceLineNo">139</span> // java.util.List won't do any BlankNode mapping, so <a name="line.139"></a>
+<span class="sourceLineNo">140</span> // instead bobNameQuad of let's check for an IRI-centric quad <a name="line.140"></a>
+<span class="sourceLineNo">141</span> final Quad q = factory.createQuad(graph1, alice, name, aliceName);<a name="line.141"></a>
+<span class="sourceLineNo">142</span> quads.contains(q);<a name="line.142"></a>
+<span class="sourceLineNo">143</span><a name="line.143"></a>
+<span class="sourceLineNo">144</span> // aborted iteration<a name="line.144"></a>
+<span class="sourceLineNo">145</span> final Iterable<Quad> iterate = dataset.iterate();<a name="line.145"></a>
+<span class="sourceLineNo">146</span> final Iterator<Quad> it = iterate.iterator();<a name="line.146"></a>
+<span class="sourceLineNo">147</span><a name="line.147"></a>
+<span class="sourceLineNo">148</span> assertTrue(it.hasNext());<a name="line.148"></a>
+<span class="sourceLineNo">149</span> it.next();<a name="line.149"></a>
+<span class="sourceLineNo">150</span> closeIterable(iterate);<a name="line.150"></a>
+<span class="sourceLineNo">151</span><a name="line.151"></a>
+<span class="sourceLineNo">152</span> // second iteration - should start from fresh and<a name="line.152"></a>
+<span class="sourceLineNo">153</span> // get the same count<a name="line.153"></a>
+<span class="sourceLineNo">154</span> long count = 0;<a name="line.154"></a>
+<span class="sourceLineNo">155</span> final Iterable<Quad> iterable = dataset.iterate();<a name="line.155"></a>
+<span class="sourceLineNo">156</span> for (@SuppressWarnings("unused") final<a name="line.156"></a>
+<span class="sourceLineNo">157</span> Quad t : iterable) {<a name="line.157"></a>
+<span class="sourceLineNo">158</span> count++;<a name="line.158"></a>
+<span class="sourceLineNo">159</span> }<a name="line.159"></a>
+<span class="sourceLineNo">160</span> assertEquals(dataset.size(), count);<a name="line.160"></a>
+<span class="sourceLineNo">161</span> }<a name="line.161"></a>
+<span class="sourceLineNo">162</span><a name="line.162"></a>
+<span class="sourceLineNo">163</span> /**<a name="line.163"></a>
+<span class="sourceLineNo">164</span> * Special quad closing for RDF4J.<a name="line.164"></a>
+<span class="sourceLineNo">165</span> */<a name="line.165"></a>
+<span class="sourceLineNo">166</span> private void closeIterable(final Iterable<Quad> iterate) throws Exception {<a name="line.166"></a>
+<span class="sourceLineNo">167</span> if (iterate instanceof AutoCloseable) {<a name="line.167"></a>
+<span class="sourceLineNo">168</span> ((AutoCloseable) iterate).close();<a name="line.168"></a>
+<span class="sourceLineNo">169</span> }<a name="line.169"></a>
+<span class="sourceLineNo">170</span> }<a name="line.170"></a>
+<span class="sourceLineNo">171</span><a name="line.171"></a>
+<span class="sourceLineNo">172</span> @Test<a name="line.172"></a>
+<span class="sourceLineNo">173</span> public void iterateFilter() throws Exception {<a name="line.173"></a>
+<span class="sourceLineNo">174</span> final List<RDFTerm> friends = new ArrayList<>();<a name="line.174"></a>
+<span class="sourceLineNo">175</span> final IRI alice = factory.createIRI("http://example.com/alice");<a name="line.175"></a>
+<span class="sourceLineNo">176</span> final IRI knows = factory.createIRI("http://xmlns.com/foaf/0.1/knows");<a name="line.176"></a>
+<span class="sourceLineNo">177</span> for (final Quad t : dataset.iterate(null, alice, knows, null)) {<a name="line.177"></a>
+<span class="sourceLineNo">178</span> friends.add(t.getObject());<a name="line.178"></a>
+<span class="sourceLineNo">179</span> }<a name="line.179"></a>
+<span class="sourceLineNo">180</span> assertEquals(1, friends.size());<a name="line.180"></a>
+<span class="sourceLineNo">181</span> assertEquals(bob, friends.get(0));<a name="line.181"></a>
+<span class="sourceLineNo">182</span><a name="line.182"></a>
+<span class="sourceLineNo">183</span> // .. can we iterate over zero hits?<a name="line.183"></a>
+<span class="sourceLineNo">184</span> final Iterable<Quad> iterate = dataset.iterate(Optional.of(graph2), bob, knows, alice);<a name="line.184"></a>
+<span class="sourceLineNo">185</span> for (final Quad unexpected : iterate) {<a name="line.185"></a>
+<span class="sourceLineNo">186</span> fail("Unexpected quad " + unexpected);<a name="line.186"></a>
+<span class="sourceLineNo">187</span> }<a name="line.187"></a>
+<span class="sourceLineNo">188</span> // closeIterable(iterate);<a name="line.188"></a>
+<span class="sourceLineNo">189</span> }<a name="line.189"></a>
+<span class="sourceLineNo">190</span><a name="line.190"></a>
+<span class="sourceLineNo">191</span> @Test<a name="line.191"></a>
+<span class="sourceLineNo">192</span> public void contains() throws Exception {<a name="line.192"></a>
+<span class="sourceLineNo">193</span> assertFalse(dataset.contains(null, bob, knows, alice)); // or so he claims..<a name="line.193"></a>
+<span class="sourceLineNo">194</span><a name="line.194"></a>
+<span class="sourceLineNo">195</span> assertTrue(dataset.contains(Optional.of(graph1), alice, knows, bob));<a name="line.195"></a>
+<span class="sourceLineNo">196</span><a name="line.196"></a>
+<span class="sourceLineNo">197</span> try (Stream<? extends Quad> stream = dataset.stream()) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> final Optional<? extends Quad> first = stream.skip(4).findFirst();<a name="line.198"></a>
+<span class="sourceLineNo">199</span> Assume.assumeTrue(first.isPresent());<a name="line.199"></a>
+<span class="sourceLineNo">200</span> final Quad existingQuad = first.get();<a name="line.200"></a>
+<span class="sourceLineNo">201</span> assertTrue(dataset.contains(existingQuad));<a name="line.201"></a>
+<span class="sourceLineNo">202</span> }<a name="line.202"></a>
+<span class="sourceLineNo">203</span><a name="line.203"></a>
+<span class="sourceLineNo">204</span> final Quad nonExistingQuad = factory.createQuad(graph2, bob, knows, alice);<a name="line.204"></a>
+<span class="sourceLineNo">205</span> assertFalse(dataset.contains(nonExistingQuad));<a name="line.205"></a>
+<span class="sourceLineNo">206</span><a name="line.206"></a>
+<span class="sourceLineNo">207</span> // An existing quad<a name="line.207"></a>
+<span class="sourceLineNo">208</span> final Quad quad = factory.createQuad(graph1, alice, knows, bob);<a name="line.208"></a>
+<span class="sourceLineNo">209</span> // FIXME: Should not this always be true?<a name="line.209"></a>
+<span class="sourceLineNo">210</span> assertTrue(dataset.contains(quad));<a name="line.210"></a>
+<span class="sourceLineNo">211</span> }<a name="line.211"></a>
+<span class="sourceLineNo">212</span><a name="line.212"></a>
+<span class="sourceLineNo">213</span> @Test<a name="line.213"></a>
+<span class="sourceLineNo">214</span> public void remove() throws Exception {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> final long fullSize = dataset.size();<a name="line.215"></a>
+<span class="sourceLineNo">216</span> dataset.remove(Optional.of(graph1), alice, knows, bob);<a name="line.216"></a>
+<span class="sourceLineNo">217</span> final long shrunkSize = dataset.size();<a name="line.217"></a>
+<span class="sourceLineNo">218</span> assertEquals(1, fullSize - shrunkSize);<a name="line.218"></a>
+<span class="sourceLineNo">219</span><a name="line.219"></a>
+<span class="sourceLineNo">220</span> dataset.remove(Optional.of(graph1), alice, knows, bob);<a name="line.220"></a>
+<span class="sourceLineNo">221</span> assertEquals(shrunkSize, dataset.size()); // unchanged<a name="line.221"></a>
+<span class="sourceLineNo">222</span><a name="line.222"></a>
+<span class="sourceLineNo">223</span> dataset.add(graph1, alice, knows, bob);<a name="line.223"></a>
+<span class="sourceLineNo">224</span> dataset.add(graph2, alice, knows, bob);<a name="line.224"></a>
+<span class="sourceLineNo">225</span> dataset.add(graph2, alice, knows, bob);<a name="line.225"></a>
+<span class="sourceLineNo">226</span> // Undetermined size at this point -- but at least it<a name="line.226"></a>
+<span class="sourceLineNo">227</span> // should be bigger<a name="line.227"></a>
+<span class="sourceLineNo">228</span> assertTrue(dataset.size() > shrunkSize);<a name="line.228"></a>
+<span class="sourceLineNo">229</span><a name="line.229"></a>
+<span class="sourceLineNo">230</span> // and after a single remove they should all be gone<a name="line.230"></a>
+<span class="sourceLineNo">231</span> dataset.remove(null, alice, knows, bob);<a name="line.231"></a>
+<span class="sourceLineNo">232</span> assertEquals(shrunkSize, dataset.size());<a name="line.232"></a>
+<span class="sourceLineNo">233</span><a name="line.233"></a>
+<span class="sourceLineNo">234</span> Quad otherQuad;<a name="line.234"></a>
+<span class="sourceLineNo">235</span> try (Stream<? extends Quad> stream = dataset.stream()) {<a name="line.235"></a>
+<span class="sourceLineNo">236</span> final Optional<? extends Quad> anyQuad = stream.findAny();<a name="line.236"></a>
+<span class="sourceLineNo">237</span> Assume.assumeTrue(anyQuad.isPresent());<a name="line.237"></a>
+<span class="sourceLineNo">238</span> otherQuad = anyQuad.get();<a name="line.238"></a>
+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
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+<span class="sourceLineNo">241</span> dataset.remove(otherQuad);<a name="line.241"></a>
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+<span class="sourceLineNo">243</span> dataset.remove(otherQuad);<a name="line.243"></a>
+<span class="sourceLineNo">244</span> assertEquals(shrunkSize - 1, dataset.size()); // no change<a name="line.244"></a>
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+<span class="sourceLineNo">246</span> // for some reason in rdf4j this causes duplicates!<a name="line.246"></a>
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+<span class="sourceLineNo">249</span> // should have increased<a name="line.249"></a>
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+<span class="sourceLineNo">253</span> @Test<a name="line.253"></a>
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+<span class="sourceLineNo">257</span> assertEquals(0, dataset.size());<a name="line.257"></a>
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+<span class="sourceLineNo">263</span> @Test<a name="line.263"></a>
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+<span class="sourceLineNo">270</span><a name="line.270"></a>
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+<span class="sourceLineNo">274</span><a name="line.274"></a>
+<span class="sourceLineNo">275</span> // Check exact count<a name="line.275"></a>
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+<span class="sourceLineNo">280</span> @Test<a name="line.280"></a>
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+<span class="sourceLineNo">295</span> try (Stream<? extends Quad> stream = dataset.stream(null, null, member, null)) {<a name="line.295"></a>
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+<span class="sourceLineNo">303</span> final Dataset g1 = createDataset1();<a name="line.303"></a>
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+<span class="sourceLineNo">305</span><a name="line.305"></a>
+<span class="sourceLineNo">306</span> // and add them to a new Dataset g3<a name="line.306"></a>
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+<span class="sourceLineNo">308</span> addAllQuads(g1, g3);<a name="line.308"></a>
+<span class="sourceLineNo">309</span> addAllQuads(g2, g3);<a name="line.309"></a>
+<span class="sourceLineNo">310</span><a name="line.310"></a>
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+<span class="sourceLineNo">312</span> // (The Dataset implementation is not currently required to<a name="line.312"></a>
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+<span class="sourceLineNo">314</span> // COMMONSRDF-15)<a name="line.314"></a>
+<span class="sourceLineNo">315</span><a name="line.315"></a>
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+<span class="sourceLineNo">317</span> // ConcurrentHashMap as we will try parallel forEach below,<a name="line.317"></a>
+<span class="sourceLineNo">318</span> // which should not give inconsistent results (it does with a<a name="line.318"></a>
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+<span class="sourceLineNo">328</span> // and contains 4 unique values<a name="line.328"></a>
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+<span class="sourceLineNo">330</span><a name="line.330"></a>
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+<span class="sourceLineNo">336</span> assertNotNull(b1Charlie);<a name="line.336"></a>
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+<span class="sourceLineNo">341</span> notEquals(b1Alice, b2Bob);<a name="line.341"></a>
+<span class="sourceLineNo">342</span> notEquals(b1Alice, b1Charlie);<a name="line.342"></a>
+<span class="sourceLineNo">343</span> notEquals(b1Alice, b2Dave);<a name="line.343"></a>
+<span class="sourceLineNo">344</span> notEquals(b2Bob, b1Charlie);<a name="line.344"></a>
+<span class="sourceLineNo">345</span> notEquals(b2Bob, b2Dave);<a name="line.345"></a>
+<span class="sourceLineNo">346</span> notEquals(b1Charlie, b2Dave);<a name="line.346"></a>
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+<span class="sourceLineNo">352</span> assertTrue(g3.contains(null, b1Alice, hasChild, b2Bob));<a name="line.352"></a>
+<span class="sourceLineNo">353</span> assertTrue(g3.contains(null, b2Dave, hasChild, b1Charlie));<a name="line.353"></a>
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+<span class="sourceLineNo">356</span> assertFalse(g3.contains(null, b1Alice, hasChild, b1Charlie));<a name="line.356"></a>
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+<span class="sourceLineNo">366</span><a name="line.366"></a>
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+<span class="sourceLineNo">373</span><a name="line.373"></a>
+<span class="sourceLineNo">374</span> /**<a name="line.374"></a>
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+<span class="sourceLineNo">376</span> * <p><a name="line.376"></a>
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+<span class="sourceLineNo">378</span> * adaptation of {@link BlankNode}s are performed.<a name="line.378"></a>
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+<span class="sourceLineNo">383</span> * Target Dataset where quads will be added<a name="line.383"></a>
+<span class="sourceLineNo">384</span> */<a name="line.384"></a>
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+<span class="sourceLineNo">387</span> // unordered() as we don't need to preserve quad order<a name="line.387"></a>
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+<span class="sourceLineNo">389</span> // thread-safe<a name="line.389"></a>
+<span class="sourceLineNo">390</span><a name="line.390"></a>
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+<span class="sourceLineNo">395</span><a name="line.395"></a>
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+<span class="sourceLineNo">402</span><a name="line.402"></a>
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+<span class="sourceLineNo">436</span><a name="line.436"></a>
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+<span class="sourceLineNo">458</span><a name="line.458"></a>
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+<span class="sourceLineNo">470</span> <a name="line.470"></a>
+<span class="sourceLineNo">471</span> /**<a name="line.471"></a>
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+<span class="sourceLineNo">473</span> * <a name="line.473"></a>
+<span class="sourceLineNo">474</span> * @throws Exception<a name="line.474"></a>
+<span class="sourceLineNo">475</span> * If test fails<a name="line.475"></a>
+<span class="sourceLineNo">476</span> */<a name="line.476"></a>
+<span class="sourceLineNo">477</span> @Test<a name="line.477"></a>
+<span class="sourceLineNo">478</span> public void getGraphNames() throws Exception {<a name="line.478"></a>
+<span class="sourceLineNo">479</span> final Set<BlankNodeOrIRI> names = dataset.getGraphNames().collect(Collectors.toSet()); <a name="line.479"></a>
+<span class="sourceLineNo">480</span> assertTrue("Can't find graph name " + graph1, names.contains(graph1));<a name="line.480"></a>
+<span class="sourceLineNo">481</span> assertTrue("Found no quads in graph1", dataset.contains(Optional.of(graph1), null, null, null));<a name="line.481"></a>
+<span class="sourceLineNo">482</span> <a name="line.482"></a>
+<span class="sourceLineNo">483</span> final Optional<BlankNodeOrIRI> graphName2 = dataset.getGraphNames().filter(BlankNode.class::isInstance).findAny();<a name="line.483"></a>
+<span class="sourceLineNo">484</span> assertTrue("Could not find graph2-like BlankNode", graphName2.isPresent()); <a name="line.484"></a>
+<span class="sourceLineNo">485</span> assertTrue("Found no quads in graph2", dataset.contains(graphName2, null, null, null));<a name="line.485"></a>
+<span class="sourceLineNo">486</span><a name="line.486"></a>
+<span class="sourceLineNo">487</span> // Some implementations like Virtuoso might have additional internal graphs,<a name="line.487"></a>
+<span class="sourceLineNo">488</span> // so we can't assume this:<a name="line.488"></a>
+<span class="sourceLineNo">489</span> //assertEquals(2, names.size());<a name="line.489"></a>
+<span class="sourceLineNo">490</span> }<a name="line.490"></a>
+<span class="sourceLineNo">491</span> <a name="line.491"></a>
+<span class="sourceLineNo">492</span> @Test<a name="line.492"></a>
+<span class="sourceLineNo">493</span> public void getGraph() throws Exception {<a name="line.493"></a>
+<span class="sourceLineNo">494</span> final Graph defaultGraph = dataset.getGraph();<a name="line.494"></a>
+<span class="sourceLineNo">495</span> // TODO: Can we assume the default graph was empty before our new triples?<a name="line.495"></a>
+<span class="sourceLineNo">496</span> assertEquals(2, defaultGraph.size());<a name="line.496"></a>
+<span class="sourceLineNo">497</span> assertTrue(defaultGraph.contains(alice, isPrimaryTopicOf, graph1));<a name="line.497"></a>
+<span class="sourceLineNo">498</span> // NOTE: graph2 is a BlankNode<a name="line.498"></a>
+<span class="sourceLineNo">499</span> assertTrue(defaultGraph.contains(bob, isPrimaryTopicOf, null));<a name="line.499"></a>
+<span class="sourceLineNo">500</span> }<a name="line.500"></a>
+<span class="sourceLineNo">501</span><a name="line.501"></a>
+<span class="sourceLineNo">502</span><a name="line.502"></a>
+<span class="sourceLineNo">503</span> @Test<a name="line.503"></a>
+<span class="sourceLineNo">504</span> public void getGraphNull() throws Exception {<a name="line.504"></a>
+<span class="sourceLineNo">505</span> // Default graph should be present<a name="line.505"></a>
+<span class="sourceLineNo">506</span> final Graph defaultGraph = dataset.getGraph(null).get();<a name="line.506"></a>
+<span class="sourceLineNo">507</span> // TODO: Can we assume the default graph was empty before our new triples?<a name="line.507"></a>
+<span class="sourceLineNo">508</span> assertEquals(2, defaultGraph.size());<a name="line.508"></a>
+<span class="sourceLineNo">509</span> assertTrue(defaultGraph.contains(alice, isPrimaryTopicOf, graph1));<a name="line.509"></a>
+<span class="sourceLineNo">510</span> // NOTE: wildcard as graph2 is a (potentially mapped) BlankNode<a name="line.510"></a>
+<span class="sourceLineNo">511</span> assertTrue(defaultGraph.contains(bob, isPrimaryTopicOf, null));<a name="line.511"></a>
+<span class="sourceLineNo">512</span> }<a name="line.512"></a>
+<span class="sourceLineNo">513</span> <a name="line.513"></a>
+<span class="sourceLineNo">514</span><a name="line.514"></a>
+<span class="sourceLineNo">515</span> @Test<a name="line.515"></a>
+<span class="sourceLineNo">516</span> public void getGraph1() throws Exception {<a name="line.516"></a>
+<span class="sourceLineNo">517</span> // graph1 should be present<a name="line.517"></a>
+<span class="sourceLineNo">518</span> final Graph g1 = dataset.getGraph(graph1).get();<a name="line.518"></a>
+<span class="sourceLineNo">519</span> assertEquals(4, g1.size());<a name="line.519"></a>
+<span class="sourceLineNo">520</span> <a name="line.520"></a>
+<span class="sourceLineNo">521</span> assertTrue(g1.contains(alice, name, aliceName));<a name="line.521"></a>
+<span class="sourceLineNo">522</span> assertTrue(g1.contains(alice, knows, bob));<a name="line.522"></a>
+<span class="sourceLineNo">523</span> assertTrue(g1.contains(alice, member, null));<a name="line.523"></a>
+<span class="sourceLineNo">524</span> assertTrue(g1.contains(null, name, secretClubName));<a name="line.524"></a>
+<span class="sourceLineNo">525</span> }<a name="line.525"></a>
+<span class="sourceLineNo">526</span><a name="line.526"></a>
+<span class="sourceLineNo">527</span> @Test<a name="line.527"></a>
+<span class="sourceLineNo">528</span> public void getGraph2() throws Exception {<a name="line.528"></a>
+<span class="sourceLineNo">529</span> // graph2 should be present, even if is named by a BlankNode<a name="line.529"></a>
+<span class="sourceLineNo">530</span> // We'll look up the potentially mapped graph2 blanknode<a name="line.530"></a>
+<span class="sourceLineNo">531</span> final BlankNodeOrIRI graph2Name = (BlankNodeOrIRI) dataset.stream(Optional.empty(), bob, isPrimaryTopicOf, null)<a name="line.531"></a>
+<span class="sourceLineNo">532</span> .map(Quad::getObject).findAny().get();<a name="line.532"></a>
+<span class="sourceLineNo">533</span> <a name="line.533"></a>
+<span class="sourceLineNo">534</span> final Graph g2 = dataset.getGraph(graph2Name).get();<a name="line.534"></a>
+<span class="sourceLineNo">535</span> assertEquals(4, g2.size());<a name="line.535"></a>
+<span class="sourceLineNo">536</span> final Triple bobNameTriple = bobNameQuad.asTriple();<a name="line.536"></a>
+<span class="sourceLineNo">537</span> assertTrue(g2.contains(bobNameTriple));<a name="line.537"></a>
+<span class="sourceLineNo">538</span> assertTrue(g2.contains(bob, member, bnode1));<a name="line.538"></a>
+<span class="sourceLineNo">539</span> assertTrue(g2.contains(bob, member, bnode2));<a name="line.539"></a>
+<span class="sourceLineNo">540</span> assertFalse(g2.contains(bnode1, name, secretClubName));<a name="line.540"></a>
+<span class="sourceLineNo">541</span> assertTrue(g2.contains(bnode2, name, companyName));<a name="line.541"></a>
+<span class="sourceLineNo">542</span> }<a name="line.542"></a>
+<span class="sourceLineNo">543</span> <a name="line.543"></a>
+<span class="sourceLineNo">544</span><a name="line.544"></a>
+<span class="sourceLineNo">545</span> <a name="line.545"></a>
+<span class="sourceLineNo">546</span> /**<a name="line.546"></a>
+<span class="sourceLineNo">547</span> * An attempt to use the Java 8 streams to look up a more complicated query.<a name="line.547"></a>
+<span class="sourceLineNo">548</span> * <p><a name="line.548"></a>
+<span class="sourceLineNo">549</span> * FYI, the equivalent SPARQL version (untested):<a name="line.549"></a>
+<span class="sourceLineNo">550</span> * <a name="line.550"></a>
+<span class="sourceLineNo">551</span> * <pre><a name="line.551"></a>
+<span class="sourceLineNo">552</span> * SELECT ?orgName WHERE {<a name="line.552"></a>
+<span class="sourceLineNo">553</span> * ?org foaf:name ?orgName .<a name="line.553"></a>
+<span class="sourceLineNo">554</span> * ?alice foaf:member ?org .<a name="line.554"></a>
+<span class="sourceLineNo">555</span> * ?bob foaf:member ?org .<a name="line.555"></a>
+<span class="sourceLineNo">556</span> * ?alice foaf:knows ?bob .<a name="line.556"></a>
+<span class="sourceLineNo">557</span> * FILTER NOT EXIST { ?bob foaf:knows ?alice }<a name="line.557"></a>
+<span class="sourceLineNo">558</span> * }<a name="line.558"></a>
+<span class="sourceLineNo">559</span> * </pre><a name="line.559"></a>
+<span class="sourceLineNo">560</span> *<a name="line.560"></a>
+<span class="sourceLineNo">561</span> * @throws Exception If test fails<a name="line.561"></a>
+<span class="sourceLineNo">562</span> */<a name="line.562"></a>
+<span class="sourceLineNo">563</span> @Test<a name="line.563"></a>
+<span class="sourceLineNo">564</span> public void whyJavaStreamsMightNotTakeOverFromSparql() throws Exception {<a name="line.564"></a>
+<span class="sourceLineNo">565</span> Assume.assumeNotNull(bnode1, bnode2, secretClubName);<a name="line.565"></a>
+<span class="sourceLineNo">566</span> // Find a secret organizations<a name="line.566"></a>
+<span class="sourceLineNo">567</span> try (Stream<? extends Quad> stream = dataset.stream(null, null, knows, null)) {<a name="line.567"></a>
+<span class="sourceLineNo">568</span> assertEquals("\"The Secret Club\"",<a name="line.568"></a>
+<span class="sourceLineNo">569</span> // Find One-way "knows"<a name="line.569"></a>
+<span class="sourceLineNo">570</span> stream.filter(t -> !dataset.contains(null, (BlankNodeOrIRI) t.getObject(), knows, t.getSubject()))<a name="line.570"></a>
+<span class="sourceLineNo">571</span> .map(knowsQuad -> {<a name="line.571"></a>
+<span class="sourceLineNo">572</span> try (Stream<? extends Quad> memberOf = dataset<a name="line.572"></a>
+<span class="sourceLineNo">573</span> // and those they know, what are they<a name="line.573"></a>
+<span class="sourceLineNo">574</span> // member of?<a name="line.574"></a>
+<span class="sourceLineNo">575</span> .stream(null, (BlankNodeOrIRI) knowsQuad.getObject(), member, null)) {<a name="line.575"></a>
+<span class="sourceLineNo">576</span> return memberOf<a name="line.576"></a>
+<span class="sourceLineNo">577</span> // keep those which first-guy is a<a name="line.577"></a>
+<span class="sourceLineNo">578</span> // member of<a name="line.578"></a>
+<span class="sourceLineNo">579</span> .filter(memberQuad -> dataset.contains(null, knowsQuad.getSubject(), member,<a name="line.579"></a>
+<span class="sourceLineNo">580</span> // First hit is good enough<a name="line.580"></a>
+<span class="sourceLineNo">581</span> memberQuad.getObject()))<a name="line.581"></a>
+<span class="sourceLineNo">582</span> .findFirst().get().getObject();<a name="line.582"></a>
+<span class="sourceLineNo">583</span> }<a name="line.583"></a>
+<span class="sourceLineNo">584</span> })<a name="line.584"></a>
+<span class="sourceLineNo">585</span> // then look up the name of that org<a name="line.585"></a>
+<span class="sourceLineNo">586</span> .map(org -> {<a name="line.586"></a>
+<span class="sourceLineNo">587</span> try (Stream<? extends Quad> orgName = dataset.stream(null, (BlankNodeOrIRI) org, name,<a name="line.587"></a>
+<span class="sourceLineNo">588</span> null)) {<a name="line.588"></a>
+<span class="sourceLineNo">589</span> return orgName.findFirst().get().getObject().ntriplesString();<a name="line.589"></a>
+<span class="sourceLineNo">590</span> }<a name="line.590"></a>
+<span class="sourceLineNo">591</span> }).findFirst().get());<a name="line.591"></a>
+<span class="sourceLineNo">592</span> }<a name="line.592"></a>
+<span class="sourceLineNo">593</span> }<a name="line.593"></a>
+<span class="sourceLineNo">594</span>}<a name="line.594"></a>
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+</div>
+</body>
+</html>
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