The flow of work, Servlet, popup and a managed Bean validation

Hello

We try to display a PDF file in a pop-up window by calling a Servlet in a JSF page using a workflow in JDeveloper 11 g R2.

The relevant part of JSF:
<af:inlineFrame id="if1" shortDesc="Report" source="/pdfservlet" styleClass="AFStretchWidth"></af:inlineFrame>
The /pdfservlet points to a Servlet with a method doGet as follows:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.reset();
  
  OutputStream out = response.getOutputStream();

  FacesContext context = this.getFacesContext(request, response);
  OracleReportBean bean =
    context.getApplication().evaluateExpressionGet(context, "#{reportBean}", OracleReportBean.class);

  bean.run(context, out);
  removeFacesContext();

  out.close();
}
The Servlet is trying to get the FacesContext, but we met with the following exception:
Caused By: javax.faces.FacesException: Cant instantiate class: oracle.adfinternal.view.faces.component.AdfViewRoot.
We have removed the following lines to the getFacesContext() method:
UIViewRoot view = facesContext.getApplication().getViewHandler().createView(facesContext, "");
facesContext.setViewRoot(view);
This avoids the exception above, however... We try to get the settings of the form that was submitted. Here is an example of the form element:
<h:inputHidden value="MyMedicationList_Report" id="system_REPORT_RESOURCE"/>
When the Servlet calls the Bean managed to retrieve the value, it uses:
Map<String, String[]> requestParameters = getRequestParameters();
Parameters p = getParameters();

for( String key : requestParameters.keySet() ) {
  for( String value : requestParameters.get( key ) ) {
    int i = key.indexOf( ':' );

    if( i >= 0 ) {
      key = key.substring( i + 1 );
    }

    p.put( key, value );
  }
}
Where getRequestParameters() tries to get the external context to retrieve the map of query parameter values:
return getExternalContext().getRequestParameterValuesMap();
The card is empty.

I tried after http://www.oracle.com/technetwork/developer-tools/adf/learnmore/oct2010-otn-harvest-183714.pdf by assigning the web.xml file:
  <!-- JspFilter must be configured before adfBindings. -->
  <filter-mapping>
    <filter-name>JpsFilter</filter-name>
    <servlet-name>PDFServlet</servlet-name>
    <dispatcher>FORWARD</dispatcher>
    <dispatcher>INCLUDE</dispatcher>
    <dispatcher>REQUEST</dispatcher>
  </filter-mapping>
  <filter-mapping>
    <filter-name>adfBindings</filter-name>
    <servlet-name>PDFServlet</servlet-name>
    <dispatcher>FORWARD</dispatcher>
    <dispatcher>REQUEST</dispatcher>
  </filter-mapping>
And set the data bindings on:
  <pageMap>
    <page path="/pdfservlet" usageId="ca_bcpra_promis_reporting_view_PDFServletPageDef"/>
  </pageMap>
  <pageDefinitionUsages>
    <page id="ca_bcpra_promis_reporting_view_PDFServletPageDef" path="ca.bcpra.promis.reporting.view.PDFServletPageDef"/>
  </pageDefinitionUsages>
The Servlet is running, called the managed bean instantiated, but cannot read the query parameters.

Is the button used to start the workflow in a dialog box:
<af:commandButton text="Run Report" id="submitReport" useWindow="true"
                  windowEmbedStyle="inlineDocument" windowModalityType="applicationModal" windowHeight="500"
                  windowWidth="700" action="runReport"/>
By using a workflow, the user input are validated before the opening of the pop-up window. We want to keep this behavior. The PDF file opens and then returned with a NullPointerException:

http://pastebin.com/raw.php?i=PaM64jL4

The Servlet, through the managed bean, made a request to the report server to pass parameters and generate a PDF file. The PDF is sent to the browser via the Servlet.

What other steps can we take to:

1. send user and system parameters.
2. generate a PDF file on a remote server.
3 distribute the PDF file to the user in a pop-up window.

Thank you.

Here you go
https://www.EverNote.com/shard/S48//sh/ae8f58be-c4d3-4AB9-8F94-3e01d0e967d0/923ab115aca22fd1e2fccbf6321cbf09

Timo

Tags: Java

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