/* * Relational_4.java * * Copyright 2004-2006 by SAP AG. All Rights Reserved. * SAP, R/3, mySAP, mySAP.com, xApps, xApp, SAP NetWeaver, and other SAP * products and services mentioned herein as well as their respective logos * are trademarks or registered trademarks of SAP AG in Germany and in several * other countries all over the world. All other product and service names * mentioned are the trademarks of their respective companies. Data contained * in this document serves informational purposes only. National product * specifications may vary. * * These materials are subject to change without notice. These materials are * provided by SAP AG and its affiliated companies ("SAP Group") for * informational purposes only, without representation or warranty of any kind, * and SAP Group shall not be liable for errors or omissions with respect to * the materials. The only warranties for SAP Group products and services are * those that are set forth in the express warranty statements accompanying * such products and services, if any. Nothing herein should be construed as * constituting an additional warranty. */ package com.sap.ip.bi.sdk.samples; import java.io.IOException; import java.io.PrintWriter; import java.sql.ResultSet; import java.util.Iterator; import java.util.List; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.omg.cwm.resource.relational.Column; import org.omg.cwm.resource.relational.Table; import com.sap.exception.IBaseException; import com.sap.ip.bi.sdk.dac.connector.IBIConnection; import com.sap.ip.bi.sdk.dac.connector.IBIRelational; import com.sap.ip.bi.sdk.dac.relational.query.IBICommandProcessor; import com.sap.ip.bi.sdk.dac.relational.query.IBIQuery; import com.sap.ip.bi.sdk.samples.servlet.MinimalServletContainer; /** * Simple relational query - * * Demonstrates how to retrieve a result set by creating a simple * query, then shows how to display the result set as an HTML table. * * View the HTML rendered by this servlet in the following file: * [SDK archive]/docs/examples/relational_4.result.html * * @author SAP * @version 3.50 * @since 3.50 */ public class Relational_4 extends HttpServlet { private final static String CONTENT_TYPE = "text/html"; public void init(ServletConfig config) throws ServletException { super.init(config); } public void doGet( HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); out.println(Helpers.getDocTypeDefinition()); out.println("<html>"); out.println("<head><title>Relational_4</title>"); out.println(Helpers.getStyleSheetDefinition()); out.println("</head><body>"); try { // ******************************************************** // Connect to a data source. // ******************************************************** IBIConnection connection = Helpers.connectToJDBCDatasource(out); IBIRelational rel = connection.getRelational(); // create JDBC sample data where needed Helpers.createJDBCSampleData(); // ******************************************************** // Retrieve the metadata. // ******************************************************** List tables = rel.getObjectFinder().findTable( (String) null, null, "%CUSTOMERS"); if (tables == null || tables.size() < 1) { throw new ServletException("metadata access failed"); } Table customer = (Table) tables.get(0); List columns = customer.getFeature(); // ******************************************************** // Create the query. // ******************************************************** // create query instance IBIQuery query = rel.createQuery(); // create command processor for this query instance IBICommandProcessor cp = query.getCommandProcessor(); // add the table String tref = cp.addTable(customer); // add all columns for (Iterator i = columns.iterator(); i.hasNext();) { Column column = (Column) i.next(); cp.addColumn(column, tref); } // execute the query ResultSet res = query.execute(); // show the executed SQL statement out.println("<p><b>SQL Statement that was executed:</b><br>"); out.println( "<code>" + rel.getNativeRepresentation(query) + "</code>"); // ******************************************************** // Render the result set. // ******************************************************** Helpers.renderResultset(out, res); } // Catch errors. catch (Exception e) { // $JL-EXC$ e.printStackTrace(); if (e instanceof IBaseException) out.println("Error: " + ((IBaseException)e).getNestedLocalizedMessage()); else out.println("Error: " + e.getMessage()); } out.println("</body>"); out.println("</html>"); } public void destroy() { } public static void main(String[] args) { if (args.length == 1) { MinimalServletContainer.executeServlet(new Relational_4(), args[0]); } else { MinimalServletContainer.executeServlet(new Relational_4(), System.out); } } }