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{ String indexPath; public void init(PortletConfig config) throws PortletException { super.init(config); //get the location of the lucene index from the //indexPath initialization parameter indexPath = config.getInitParameter("indexPath"); if (indexPath == null) { //this portlet requires this parameter String errMsg = "The init parameter indexPath must be set."; throw new UnavailableException(errMsg); } //set Lucene lockdir because java.io.tmpdir may not exist in Pluto System.setProperty("org.apache.lucene.lockdir", indexPath); } public void doView(RenderRequest request, RenderResponse response) throws PortletException, IOException { response.setContentType("text/html"); Writer writer = response.getWriter(); PortletContext portletContext = getPortletContext(); PortletSession session = request.getPortletSession(); PortletRequestDispatcher prd = portletContext.getRequestDispatcher("/WEB-INF/jsp/SearchForm.jsp"); prd.include(request, response); String contentPath = request.getParameter("contentPath"); if (request.getParameter("query") != null) { request.setAttribute("indexPath", indexPath); PortletRequestDispatcher prd2 = portletContext.getRequestDispatcher(

if (reader.Name == "lastname") { reader.Read(); string lastname = reader.Value; TreeNode node = new TreeNode(lastname); employeenode.Nodes.Add(node); } if (reader.Name == "homephone") { string homephone = reader.ReadElementString(); TreeNode node = new TreeNode(homephone); employeenode.Nodes.Add(node); } if (reader.Name == "notes") { string notes = reader.ReadElementString(); TreeNode node = new TreeNode(notes); employeenode.Nodes.Add(node); } } reader.Close(); } The code creates an instance of the XmlTextReader class by passing the path of the XML file. The WhitespaceHandling property of XmlTextReader governs the behavior of the reader while reading white space. This property is an enumeration of type WhitespaceHandling and has three possible values: All, None, or Significant. We set WhitespaceHandling to ignore any white space. This will simplify our coding. A while loop repeatedly calls the Read() method of XmlTextReader. The Read() method reads the next node from the file and returns true if the next node can be read successfully; otherwise, it returns false. Inside the while loop, the code retrieves the type of node by using the NodeType property of the XmlTextReader class. The NodeType property is an enumeration of type XmlNodeType and can have values such as Attribute, CDATA, Comment, Element, EndElement, Text, Whitespace, SignificantWhitespace, and so on. Note that the start and end elements are represented separately. This is because while scanning the document the XmlTextReader class reads start elements (for example, <employee>) and end elements (for example, </employee>) separately. In our example, we are interested only in start elements and therefore the if condition checks only for a node type of Element.

10. Generate an ExecuteCode handler using the Properties dialog, and the IDE will generate the code handler, wire it up to the workflow, and then open the code window. Edit the handler so that it reads like this:

"/WEB-INF/jsp/SearchResults.jsp"); prd2.include(request, response); } else if (contentPath != null) { File file = new File(contentPath); if (!file.exists()) { writer.write("Requested content does not exist."); return; } //write the content of the file out FileReader fr = new FileReader(file); BufferedReader br = new BufferedReader(fr); String line; while ((line = br.readLine()) != null) { writer.write(line); } } } public void processAction(ActionRequest request, ActionResponse response) throws PortletException, IOException { //increase the portlet's size response.setWindowState(WindowState.MAXIMIZED); //pass the query to the render method response.setRenderParameter("query", request.getParameter("query")); } }

Lucene is capable of indexing any file format for documents, but the application that uses the Lucene search engine is responsible for translating these document types into a format that Lucene can understand. You can use open source or free solutions to index several of these, including HTML, PDF, Word, and Excel. Many Lucene users use more than one of these in their applications. Indexing XML documents usually requires custom development, because XML schemas and

private void codeActivity1_ExecuteCode(object sender, EventArgs e) { _fahrenheit = 32 + ((9 * _centigrade) / 5); }