Converting byte array to pdfor any filetype using JSF

Hi All,

The below code is working fine in a DynamicProject created in RAD.But in portlet project its not workign.I'm getting null pointer exception for httpresponse,so I made it static in SessionHelper class.Now I get null pointer exception while trying to get ServletoutputStream instance.

My requirement is when I click on the command button or commandLink I'm calling a method which converts byte array to filetype specified.But I get null pointer exception when I try to get servletoutputstream.If someone has faced the same pbm and got the solution please let me know.
I'm posting my code here.

PAGECODE
 
package pagecode;
 
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
 
public class MyPageCode extends PageCodeBase {
 
protected UserBean userBean;
FacesContext fc;
 
protected UserBean getUserBean() {
if (userBean == null) {
userBean = (UserBean) getFacesContext().getApplication()
.createValueBinding("#{userBean}").getValue(
getFacesContext());
}
return userBean;
}
 
protected void setUserBean(UserBean userBean) {
this.userBean = userBean;
}
 
public void doClickAction(ActionEvent event)
{
try {
File f=new File("c:\\test.html");
HttpServletResponse httpServletResponse = SessionHelper.getHttpServletResponse();
ServletOutputStream servletOutputStream = httpServletResponse.getOutputStream();
httpServletResponse.setHeader("Content-disposition", "attachment; filename=" +"test.html");
httpServletResponse.setContentLength((int) f.length());
httpServletResponse.setContentType("application/x-download");
servletOutputStream.write(getBytesFromFile(f));
} catch (IOException e) {
e.printStackTrace();
}
FacesContext.getCurrentInstance().responseComplete();
}

public static byte[] getBytesFromFile(File file) throws IOException {
      InputStream is = new FileInputStream(file);
      long length = file.length();
        byte[] bytes = new byte[(int)length];
        int offset = 0;
        int numRead = 0;
        while (offset < bytes.length
               && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {
            offset += numRead;
        }
        if (offset < bytes.length) {
            throw new IOException("Could not completely read file "+file.getName());
        }
        is.close();
        return bytes;
    }
 
}

JSF

[/nobr]

<faces-config>
<factory>
<faces-context-factory>
com.ibm.faces.context.WPPortletFacesContextFactoryImpl</faces-context-factory>
</factory>
<managed-bean>
<managed-bean-name>pc_TestPortlet1View</managed-bean-name>
<managed-bean-class>pagecode.TestPortlet1View</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
<lifecycle>
<phase-listener>com.ibm.faces.webapp.ValueResourcePhaseListener</phase-listener>
</lifecycle>

<application>
<variable-resolver>com.ibm.faces.databind.SelectItemsVarResolver</variable-resolver>
<variable-resolver>
com.ibm.faces.application.WPPortletVariableResolver</variable-resolver>
<property-resolver>com.ibm.faces.databind.SelectItemsPropResolver</property-resolver>
</application>
   
   <managed-bean>
   <managed-bean-name>pc_MyPageCode</managed-bean-name>
   <managed-bean-class>pagecode.MyPageCode</managed-bean-class>
   <managed-bean-scope>request</managed-bean-scope>
   </managed-bean>
 
   <managed-bean>
   <managed-bean-name>userBean</managed-bean-name>
   <managed-bean-class>com.gft.UserBean</managed-bean-class>
   <managed-bean-scope>session</managed-bean-scope>
   </managed-bean>
</faces-config>

Is that something to be added to faces config or where does I go wrong.
PLease help me to solve this pbm.

Thanks,
Sonara.
[ April 05, 2006: Message edited by: Sonara Rahul ]