Exercise Jdom table manipulations

ws/eclipse/Sda1PreExam/src/dom/table/ReorderTableData.java

-package dom.table;
-
-import java.io.IOException;
-import java.util.List;
-
-import org.jdom2.Document;
-import org.jdom2.Element;
-import org.jdom2.JDOMException;
-import org.jdom2.input.SAXBuilder;
-import org.jdom2.xpath.XPathExpression;
-import org.jdom2.xpath.XPathFactory;
-
-
-/** 
- * How to use XPath expressions to search for <img>
- *  elements in XHTML document instances.
- *  
- * @author goik
- */
-public class ReorderTableData {
-   private final SAXBuilder builder = new SAXBuilder();
-
-   /**
-   * 
-   */
-  public ReorderTableData() {
-      builder.setErrorHandler(new MySaxErrorHandler(System.err));
-   }
-   /** 
-    * Read an XHTML document and search for images. The image filenames will be
-    * written to standard out.
-    * @param xhtmlFilename The XHTML's filename to be examined.
-    * @throws JDOMException 
-    * @throws IOException
-    */
-   public void process(final String xhtmlFilename) throws JDOMException, IOException {
-
-      final Document htmlInput = builder.build(xhtmlFilename);
-      final XPathExpression<Object> xpath = XPathFactory.instance().compile("//img");
-      final List<Object> images = xpath.evaluate(htmlInput);
-
-      for (Object o: images) {
-         final Element image = (Element ) o;
-         System.out.print(image.getAttributeValue("src") + " "); 
-      }
-   }
-}
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ws/eclipse/Sda1PreExam/src/dom/table1/Driver.java

+package dom.table1;
+
+/**
+ * Driver to test XPath based searching of <img> elements
+ * within a given HTML document.
+ *
+*/
+public class Driver {
+
+  /**
+   * @param args
+   * @throws Exception
+   */
+  public static void main(String[] args) throws Exception {
+    final TablePresentation ao = new TablePresentation();
+    // The following HTML document is being searched
+    // for <img> elements.
+    ao.process("src/dom/table/persons.xml");
+  }
+}
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ws/eclipse/Sda1PreExam/src/dom/table1/TablePresentation.java

+package dom.table1;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.jdom2.Document;
+import org.jdom2.Element;
+import org.jdom2.JDOMException;
+import org.jdom2.input.SAXBuilder;
+import org.jdom2.output.Format;
+import org.jdom2.output.XMLOutputter;
+import org.jdom2.xpath.XPathExpression;
+import org.jdom2.xpath.XPathFactory;
+
+import dom.table.MySaxErrorHandler;
+
+public class TablePresentation {
+	private final SAXBuilder builder = new SAXBuilder();
+
+	public TablePresentation() {
+		builder.setErrorHandler(new MySaxErrorHandler(System.err));
+	}
+	public void process(final String xmlFilename) throws JDOMException,
+			IOException {
+
+		// Create HTML <table><tr><th>Name</th><th>Birthday</th></tr></table>
+		final Element table = new Element("table");
+		final Element tableHeader = new Element("tr");
+		table.addContent(tableHeader);
+		tableHeader.addContent(new Element("th").addContent("Name"));
+		tableHeader.addContent(new Element("th").addContent("Birthday"));
+
+		// Read addressbook from XML input file
+		final Document addressbook = builder.build(xmlFilename);
+		// Search for <person> elements
+		@SuppressWarnings("unchecked")
+		final XPathExpression<Element> xpath = (XPathExpression<Element>) (Object) XPathFactory
+				.instance().compile("/addressbook/person");
+		final List<Element> persons = xpath.evaluate(addressbook);
+		// Create a <tr> for each <person> element
+		boolean setBackground = true;
+		for (Element person : persons) {
+			final Element tr = new Element("tr");
+			if (setBackground) {
+				tr.setAttribute("style", "background-color: #FFFF88;");
+				setBackground = false;
+			} else {
+				setBackground = true;
+			}
+			table.addContent(tr);
+			tr.addContent(new Element("td").addContent(person.getChild("name").getText()));
+			tr.addContent(new Element("td").addContent(person.getChild("birthday").getText()));
+		}
+		final Format outFormat = Format.getPrettyFormat();
+
+		// Serialize to standard output
+		final XMLOutputter printer = new XMLOutputter(outFormat);
+		printer.output(table, System.out);
+	}
+}
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ws/eclipse/Sda1PreExam/src/dom/table2/Driver.java

+package dom.table2;
+
+/**
+ * Driver to test XPath based searching of <img> elements
+ * within a given HTML document.
+ *
+*/
+public class Driver {
+
+  /**
+   * @param args
+   * @throws Exception
+   */
+  public static void main(String[] args) throws Exception {
+    final TablePresentation ao = new TablePresentation();
+    // The following HTML document is being searched
+    // for <img> elements.
+    ao.process("src/dom/table/persons.xml");
+  }
+}
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ws/eclipse/Sda1PreExam/src/dom/table2/TablePresentation.java

+package dom.table2;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.jdom2.Document;
+import org.jdom2.Element;
+import org.jdom2.JDOMException;
+import org.jdom2.input.SAXBuilder;
+import org.jdom2.output.Format;
+import org.jdom2.output.XMLOutputter;
+import org.jdom2.xpath.XPathExpression;
+import org.jdom2.xpath.XPathFactory;
+
+import dom.table.MySaxErrorHandler;
+
+public class TablePresentation {
+	private final SAXBuilder builder = new SAXBuilder();
+
+	public TablePresentation() {
+		builder.setErrorHandler(new MySaxErrorHandler(System.err));
+	}
+	public void process(final String xmlFilename) throws JDOMException,
+			IOException {
+
+		// Read addressbook from XML input file
+		final Document addressbook = builder.build(xmlFilename);
+
+		// Create HTML <table/>
+		final Element table = new Element("table");
+
+		// Search for <person> elements
+		@SuppressWarnings("unchecked")
+		final XPathExpression<Element> xpath = (XPathExpression<Element>) (Object) XPathFactory
+				.instance().compile("/addressbook/person");
+		final List<Element> persons = xpath.evaluate(addressbook);
+		
+		// Create the name row
+		final Element nameRow = new Element("tr");
+		table.addContent(nameRow);
+		nameRow.addContent(new Element("th").addContent("Name"));
+
+		// Create the name birthday row
+		final Element birthdayRow = new Element("tr");
+		table.addContent(birthdayRow);
+		birthdayRow.addContent(new Element("th").addContent("Birthday"));
+
+		for (Element person : persons) {
+			nameRow.addContent(new Element("td").addContent(person.getChild("name").getText()));
+			birthdayRow.addContent(new Element("td").addContent(person.getChild("birthday").getText()));
+		}
+
+		final Format outFormat = Format.getPrettyFormat();
+		final XMLOutputter printer = new XMLOutputter(outFormat);
+		printer.output(table, System.out);
+	}
+}
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