How to use p:graphicImage with StreamedContent within p:dataTable? [duplicate]

by

The <p:graphicImage> will call the getter method twice. First time is when the <img> element is to be rendered to HTML and thus requires an URL in the src attribute. If you just return new DefaultStreamedContent(), then it will autogenerate the right URL in src attribute. Second time is when the browser really requests the image, this is the moment when you should return the actual image.

So, the getter method should basically look like this:

public StreamedContent getStreamedImageById() {
    FacesContext context = FacesContext.getCurrentInstance();

    if (context.getCurrentPhaseId() == PhaseId.RENDER_RESPONSE) {
        // So, we're rendering the view. Return a stub StreamedContent so that it will generate right URL.
        return new DefaultStreamedContent();
    }
    else {
        // So, browser is requesting the image. Get ID value from actual request param.
        String id = context.getExternalContext().getRequestParameterMap().get("id");
        Image image = service.find(Long.valueOf(id));
        return new DefaultStreamedContent(new ByteArrayInputStream(image.getBytes()));
    }
}

More Related Contents:

  1. Display dynamic image from database or remote source with p:graphicImage and StreamedContent
  2. Load images from outside of webapps / webcontext / deploy folder using or tag
  3. How to find out client ID of component for ajax update/render? Cannot find component with expression “foo” referenced from “bar”
  4. How can I pass selected row to commandLink inside dataTable or ui:repeat?
  5. How to select JSF components using jQuery?
  6. Component to inject and interpret String with HTML code into JSF page
  7. How to show details of current row from p:dataTable in a p:dialog and update after save
  8. How to let validation depend on the pressed button?
  9. Can I update a JSF component from a JSF backing bean method?
  10. How do PrimeFaces Selectors as in update=”@(.myClass)” work?
  11. PrimeFaces validator not fired
  12. How to bind dynamic content using ?
  13. Primefaces static and dynamic columns in datatable
  14. PrimeFaces CSS skin not showing in login page, also JavaScript undefined errors
  15. What is the function of @this exactly?
  16. p:dataExporter does not recognize p:cellEditor
  17. JSF + PrimeFaces: `update` attribute does not update component
  18. Show image as byte[] from database as graphic image in JSF page
  19. PrimeFaces commandButton doesn’t navigate or update
  20. How to use EL in PrimeFaces oncomplete attribute which is updated during action method
  21. How do UISelectOne and UISelectMany components preselect defaults in f:selectItems
  22. UISelectMany on a List causes java.lang.ClassCastException: java.lang.String cannot be cast to T
  23. c:forEach inside primefaces(e.g. p:panelgrid) inside ui:repeat
  24. List of events
  25. Primefaces datatable frozen columns misallignment
  26. Defer loading and parsing of PrimeFaces JavaScript files
  27. JSF 2 dataTable row index without dataModel
  28. Keep open when validation has failed
  29. Ajax update and submission using h:commandButton
  30. JSF resource versioning

Leave a Comment