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Commit 73ff070e authored by Goik Martin's avatar Goik Martin
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HTML solutions file

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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Solutions</title>
<meta charset="UTF-8" />
</head>
<body><h1>Test solutions</h1><h2>Test 3</h2><h3>Well-formed and
valid</h3><p>“well-formed” XML document instances obey the constraints of
well-formedness like:</p><ul>
<li>Proper nesting of elements</li>
<li>Exactly one root element</li>
<li>quoting of attribute values. (Unlike HTML in its SGML variant
allowing e.g. <code>&lt;img align=top&gt;</code>)</li>
</ul><p>“valid” XML document instances are “well-formed” and in
addition conform to a grammar being expressed as e.g. XML Schema, RelaxNG or
DTD.</p><h3>Doodle poll XML data</h3><p><a
href="/ilias/data/iliasclient1/assessment/4018/1952/solution/doodle.zip">doodle.zip</a>
offers a solution.</p><h2>Test 4</h2><p><a
href="/iliasData/goik/Xml2xml_Solutiondsadhiukfhsr65RRY_o/xml2xml_solution.zip">xml2xml_solution.zip</a>
contains an Eclipse project based reference implementation.</p><h2>Test
5</h2><p><a
href="/iliasData/goik/book2html_Solution_idzhsfc5-6FFsfK/book2Html_solution.zip">book2Html_solution.zip</a>
contains an Eclipse project based reference implementation.</p><h3>XML book
instances</h3><h2>Test 6</h2><h3>Printing element names</h3><p>The
implemented method <code>startElement</code> has got wrong signature.
According to the Java 1.7 API documentation <a
href="http://docs.oracle.com/javase/7/docs/api/org/xml/sax/helpers/DefaultHandler.html#startElement(java.lang.String,%20java.lang.String,%20java.lang.String,%20org.xml.sax.Attributes)">startElement</a>
should have <code>org.xml.sax.Attributes</code> as its last argument. But in
the given code the last argument is of type
<code>java.util.jar.Attributes</code>. Hence the handler does not redefine
the corresponding parent class method <a
href="http://docs.oracle.com/javase/7/docs/api/org/xml/sax/helpers/DefaultHandler.html#startElement(java.lang.String,%20java.lang.String,%20java.lang.String,%20org.xml.sax.Attributes)">startElement</a>
but instead adds an overloaded method. At runtime the SAX parser will call
the (dummy) method being defined in the parent class DefaultHandler thus
completely ignoring the intended implementation.</p><p>Replacing
<code>import java.util.jar.Attributes</code> by <code>import
org.xml.sax.Attributes</code> solves the problem.</p><p>An
<code>@Override</code> annotation would have flagged this apparent mistake
as a Java compile time error.</p><h3>SAX html creation (2 parts)</h3><p><a
href="/iliasData/goik/sax_hahHzh66-99DDDwsq/jidHFced74_98GFWWs/saxmemo2html_solution.zip">saxmemo2html_solution.zip</a>
contains an Eclipse project based reference implementation.</p><h2>Test
7</h2><h3>Jdom tables, 2 parts</h3><p><a
href="/iliasData/goik/jdomtable_Solution_65RRR_fkweFGjhuiz/jdomtable_solution.zip">jdomtable_solution.zip</a>
contains a Maven reference implementation.</p></body>
</html>
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