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From st...@apache.org
Subject svn commit: r1001921 [18/21] - in /websites/staging/commonsrdf/content: ./ 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/experiment...
Date Wed, 30 Nov 2016 23:45:21 GMT
Added: websites/staging/commonsrdf/content/testapidocs/src-html/org/apache/commons/rdf/api/AbstractDatasetTest.html
==============================================================================
--- websites/staging/commonsrdf/content/testapidocs/src-html/org/apache/commons/rdf/api/AbstractDatasetTest.html (added)
+++ websites/staging/commonsrdf/content/testapidocs/src-html/org/apache/commons/rdf/api/AbstractDatasetTest.html Wed Nov 30 23:45:19 2016
@@ -0,0 +1,666 @@
+<!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> * &lt;p&gt;<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 &lt;code&gt;Test&lt;/code&gt; 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> * &lt;p&gt;<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() &gt; 0);<a name="line.131"></a>
+<span class="sourceLineNo">132</span>        final List&lt;Quad&gt; quads = new ArrayList&lt;&gt;();<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&lt;Quad&gt; iterate = dataset.iterate();<a name="line.145"></a>
+<span class="sourceLineNo">146</span>        final Iterator&lt;Quad&gt; 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&lt;Quad&gt; 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&lt;Quad&gt; 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&lt;RDFTerm&gt; friends = new ArrayList&lt;&gt;();<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&lt;Quad&gt; 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&lt;? extends Quad&gt; stream = dataset.stream()) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span>            final Optional&lt;? extends Quad&gt; 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() &gt; 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>
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+<span class="sourceLineNo">234</span>        Quad otherQuad;<a name="line.234"></a>
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+<span class="sourceLineNo">237</span>            Assume.assumeTrue(anyQuad.isPresent());<a name="line.237"></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">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>
+<span class="sourceLineNo">313</span>            // keep supporting those BlankNodes with contains() - see<a name="line.313"></a>
+<span class="sourceLineNo">314</span>            // COMMONSRDF-15)<a name="line.314"></a>
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+<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">373</span><a name="line.373"></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">420</span>     * translate such to its own instances)<a name="line.420"></a>
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+<span class="sourceLineNo">424</span>     */<a name="line.424"></a>
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+<span class="sourceLineNo">460</span>        g2.add(b1, b1, name, factory2.createLiteral("Charlie"));<a name="line.460"></a>
+<span class="sourceLineNo">461</span><a name="line.461"></a>
+<span class="sourceLineNo">462</span>        final BlankNode b2 = createOwnBlankNode("b2", "2209097a-5078-4b03-801a-6a2d2f50d739");<a name="line.462"></a>
+<span class="sourceLineNo">463</span>        g2.add(b2, b2, name, factory2.createLiteral("Dave"));<a name="line.463"></a>
+<span class="sourceLineNo">464</span><a name="line.464"></a>
+<span class="sourceLineNo">465</span>        final IRI hasChild = factory2.createIRI("http://example.com/hasChild");<a name="line.465"></a>
+<span class="sourceLineNo">466</span>        // NOTE: Opposite direction of loadDataset1<a name="line.466"></a>
+<span class="sourceLineNo">467</span>        g2.add(b2, b2, hasChild, b1);<a name="line.467"></a>
+<span class="sourceLineNo">468</span>        return g2;<a name="line.468"></a>
+<span class="sourceLineNo">469</span>    }<a name="line.469"></a>
+<span class="sourceLineNo">470</span>    <a name="line.470"></a>
+<span class="sourceLineNo">471</span>    /**<a name="line.471"></a>
+<span class="sourceLineNo">472</span>     * Ensure {@link Dataset#getGraphNames()} contains our two graphs.<a name="line.472"></a>
+<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&lt;BlankNodeOrIRI&gt; 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&lt;BlankNodeOrIRI&gt; 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>     * &lt;p&gt;<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>     * &lt;pre&gt;<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>     * &lt;/pre&gt;<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&lt;? extends Quad&gt; 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 -&gt; !dataset.contains(null, (BlankNodeOrIRI) t.getObject(), knows, t.getSubject()))<a name="line.570"></a>
+<span class="sourceLineNo">571</span>                            .map(knowsQuad -&gt; {<a name="line.571"></a>
+<span class="sourceLineNo">572</span>                                try (Stream&lt;? extends Quad&gt; 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 -&gt; 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 -&gt; {<a name="line.586"></a>
+<span class="sourceLineNo">587</span>                                try (Stream&lt;? extends Quad&gt; 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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+</pre>
+</div>
+</body>
+</html>
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