Create a weather magnet using xml feed from weather.com

In this weblog i am going to present code to build a nice weather magnet for you portal. The code uses xml feed from weather.com and transforms the feed into a nice display using XSLT.

contentconverterapi.jar,contentconversionapi.jar

Get an account from weather.com for your xml feed. Weather.com will send you a partner id and account key. You will see this info to retrieve the xml feed.

[http://www.weather.com/services/xmloap.html | http://www.weather.com/services/xmloap.html]

Create a portal project(com.ust.weather) in NWDS or eclipse. Add a Dynpage class called

Save the following image to your dist->images folder by right clicking on it. Make sure you don’t rename the image.

Modify your Display.java to add the following code.

/* Built By: Prakash Singh

• Technical Consultant

• Universal System Technologies, Inc

• 2500 W. Lake Mary Blvd., Ste 212-A

• Lake Mary, FL 32746 USA

• M 407-474-2216

*/

package com.ust.weather;

import java.io.BufferedInputStream;

import java.io.BufferedReader;

import java.io.ByteArrayInputStream;

import java.io.File;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.MalformedURLException;

import java.net.URL;

import com.sapportals.htmlb.DropdownListBox;

import com.sapportals.htmlb.Form;

import com.sapportals.htmlb.GridLayout;

import com.sapportals.htmlb.GridLayoutCell;

import com.sapportals.htmlb.Link;

import com.sapportals.htmlb.enum.CellHAlign;

import com.sapportals.htmlb.enum.DropdownListBoxDesign;

import com.sapportals.htmlb.event.Event;

import com.sapportals.htmlb.htmlcontainer.NonIsolatedHtmlContainer;

import com.sapportals.htmlb.page.DynPage;

import com.sapportals.htmlb.page.PageException;

import com.sapportals.portal.htmlb.page.PageProcessorComponent;

import com.sapportals.portal.prt.component.IPortalComponentInitContext;

import com.sapportals.portal.prt.component.IPortalComponentRequest;

import com.sapportals.portal.prt.component.PortalComponentException;

import com.sapportals.portal.prt.contentconversion.XSLConverter;

import com.sapportals.portal.prt.logger.ILogger;

import com.sapportals.portal.prt.runtime.IPortalConstants;

import com.sapportals.portal.prt.runtime.PortalRuntime;

/**

• @author Prakash Singh

*/

public class display extends PageProcessorComponent {

     /* (non-Javadoc)

• @see com.sapportals.portal.htmlb.page.PageProcessorComponent#getPage()

      */

     public DynPage getPage() {

          return new RSSDynPage();

     }

     /* (non-Javadoc)

• @see com.sapportals.portal.prt.component.IPortalComponentInit#init(com.sapportals.portal.prt.component.IPortalComponentInitContext)

      */

     public void init(IPortalComponentInitContext arg0)

          throws PortalComponentException {

          // TODO Auto-generated method stub

          super.init(arg0);

     }

     public class RSSDynPage extends DynPage {

          /* (non-Javadoc)

• @see com.sapportals.htmlb.page.DynPage#doInitialization()

          */

          private String location = “”;

          private String center = “”;

          private String tendayurl = “”;

          public void doInitialization() throws PageException {

               // TODO Auto-generated method stub

               location = “”;

          }

          /* (non-Javadoc)

• @see com.sapportals.htmlb.page.DynPage#doProcessAfterInput()

           */

          public void doProcessAfterInput() throws PageException {

               // TODO Auto-generated method stub

          }

          public void onSelect(Event vent) throws PageException {

               DropdownListBox centerfld =

                                   (DropdownListBox) getComponentByName(“DDLocation”);

             location = centerfld.getValueAsDataType().toString();

                    }

          /* (non-Javadoc)

• @see com.sapportals.htmlb.page.DynPage#doProcessBeforeOutput()

           */

          public void doProcessBeforeOutput() throws PageException {

               ILogger logger =

                    PortalRuntime.getLogger(IPortalConstants.IVIEW_LOGGER);

               BufferedReader reader = null;

               try {

                    IPortalComponentRequest request =

                         (IPortalComponentRequest) this.getRequest();

                    URL url = getURL();

                    reader =

                         new BufferedReader(

                              new InputStreamReader(

                                   new BufferedInputStream(url.openStream())));

                    StringBuffer buff = new StringBuffer();

                    for (int i = reader.read(); i != -1; i = reader.read()) {

                         buff.append((char) i);

                    }

                    reader.close();

                    String rssString = buff.toString();

                    //get rss stylesheet

                    File file = getRssStyleSheet(request);

                    XSLConverter converter = new XSLConverter(file, null);

                    String result = converter.convert(rssString, request);

                    NonIsolatedHtmlContainer container =

                         new NonIsolatedHtmlContainer(

                              new ByteArrayInputStream(result.getBytes()));

                    Form form = this.getForm();

                    form.addRawText(“

Deploy your component and run it. BAM! you got yourself a nice weather magnet.