/*
* 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);
}
}
}