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POJava - Jena API - Getting more than one datatypeproperty
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  1. POJava - Jena API - Getting more than one datatypeproperty
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    copied!<p>I'm using Java and Jena API. I have a <strong><em>class Marriage</em></strong> which have 3 Object Properties called <strong>"hasHusband"</strong>, <strong>"Haswife"</strong> and <strong>"dateOfMarriage"</strong>. The first two are associated with a <strong><em>class Person</em></strong> which has the datatypeproperties <strong>hasFirstName</strong>, <strong>hasLastName</strong>, <strong>dateOfBirth</strong>....</p> <p>Through the code below I can access the hasFirstName property of the husband.</p> <pre><code>StmtIterator iter = onto.model.listStatements(null,onto.hasHusband,(RDFNode)null); while (iter.hasNext()) { Statement stmt = iter.nextStatement(); Resource P = ((Resource) stmt.getObject()); StmtIterator iter2 = onto.model.listStatements(((Resource) P),onto.hasFirstName,(RDFNode)null); while (iter2.hasNext()) { Statement stmt2 = iter2.nextStatement(); firstnameHusband = stmt2.getObject().toString(); }} </code></pre> <p><strong>I would like to modify this line</strong> </p> <pre><code> StmtIterator iter2 = onto.model.listStatements(((Resource) P),onto.hasFirstName,(RDFNode)null); </code></pre> <p><strong>in order to access also the hasLastName and hasDateofBirth...</strong></p> <p>Can you explain me how can I do this?</p> <p>Thanks</p> <p><strong>EDITED: @Pierre</strong> Now it concerns only the class Person. In case of womans I want to output in a new file (text file) this line below <em>for each woman</em>:</p> <pre><code>[label= \"" +firstName+ " \"\n\n\"D.Naiss:"+dnai1+"\", "+shape2+"] </code></pre> <p>And <em>for each man</em> this:</p> <pre><code>[label= \"" +firstName+ " \"\n\n\"D.Naiss:"+dnai1+"\", "+shape+"] </code></pre> <p>The diference is in the value of shape. The problem I have is that he only outputs one woman and one man.</p> <p>A person is represented like this in my rdf file:</p> <pre><code> &lt;rdf:Description rdf:about="http://www.fam.com/FAM#Bruno04/02/1980 "&gt; &lt;j.0:FAMhasGender&gt;H&lt;/j.0:FAMhasGender&gt; &lt;j.0:FAMhasDateOfBirth&gt;04/02/1980&lt;/j.0:FAMhasDateOfBirth&gt; &lt;j.0:FAMhasLastName&gt;DS &lt;/j.0:FAMhasLastName&gt; &lt;j.0:FAMhasFirstName&gt; Bruno&lt;/j.0:FAMhasFirstName&gt; &lt;/rdf:Description&gt; </code></pre> <p>Here is the relevant code:</p> <pre><code>public void accessProp() { readFile(inputFile); // rdf String fname; String dd; String gen; ExtendedIterator instances = onto.person.listInstances(); Individual instance = null; Individual firstInstance = null; while (instances.hasNext()) { instance = (Individual) instances.next(); gen = instance.getPropertyValue(onto.hasGender).toString(); fname = instance.getPropertyValue(onto.hasFirstName).toString(); dd = instance.getPropertyValue(onto.hasDateOfBirth).toString(); writeFile(fname, dd, genr); } } // Write text file public void writeFile(String fn, String dbir, String gn) { String fileout = "D:/file1.txt"; String firstName = fn; String dateB = dbir; String gender = gn; BufferedWriter out; try { out = new BufferedWriter(new FileWriter(fileout, true)); if (gender.equals("F")) { out.write("[label= \"" + firstName + " \"\n\n\"D.Naiss:" + dnai1 + "\", " + shape + "]"); } else if (gender.equals("M")) { out.write("[label= \"" + firstName + " \"\n\n\"D.Naiss:" + dnai1 + "\", " + shape2 + "]"); } out.newLine(); // flushes and closes the stream out.close(); } catch (IOException e) { System.out.println("There was a problem:" + e); } } </code></pre> <p>Can you tell me what should I do to solve my problem?</p> <p>Thanks</p>
 

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