Tuesday, October 21, 2014

How to display dynamic PDF document with <p:media /> component

From the PrimeFaces showcase, the media component used to display PDF document
But the showcase uses a static PDF document.

In real life, we might want to display different PDF documents by different use cases,
or a runtime generated PDF document.

To achieve the above purpose, we need to use the value attribute in <p:media /> component by passing in a StreamedContent from backingBean.

1. BackingBean method that return StreamedContent.
public StreamedContent getPdfDocument() {  

     // logic to generate the PDF  

    return new DefaultStreamedContent(pdfInByteArrayInputStream, "application/pdf");
}


2. display the PDF content with <p:media /> component.

<p:media value="#{myBean.pdfDocument}" width="100%" height="500px" player="pdf" />


Done!!

8 comments:

  1. i am getting this exception

    java.lang.IllegalArgumentException: pdf is not a valid media player type
    org.primefaces.component.media.player.MediaPlayerFactory.getPlayer(MediaPlayerFactory.java:52)
    org.primefaces.component.media.MediaRenderer.resolvePlayer(MediaRenderer.java:119)
    org.primefaces.component.media.MediaRenderer.encodeEnd(MediaRenderer.java:41)
    javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:905)
    javax.faces.component.UIComponent.encodeAll(UIComponent.java:1786)
    javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
    javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:875)
    javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)
    javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
    javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
    com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:439)
    com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
    com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)

    ReplyDelete
    Replies
    1. what version of PF you are using?
      I checked the PF tag doc for 3.x, 4.x, 5.x
      below are the description for player attribute

      Type of the player, possible values are
      "quicktime","windows","flash","real" and "pdf".

      Delete
  2. java.lang.NoClassDefFoundError: javax/el/ValueReference
    at org.primefaces.el.InterceptingResolver.setValue(InterceptingResolver.java:28)
    at com.sun.el.parser.AstValue.setValue(AstValue.java:167)
    at com.sun.el.ValueExpressionImpl.setValue(ValueExpressionImpl.java:273)
    at com.sun.faces.facelets.el.TagValueExpression.setValue(TagValueExpression.java:131)
    at org.primefaces.el.ValueExpressionAnalyzer.getExpression(ValueExpressionAnalyzer.java:49)
    at org.primefaces.util.DynamicResourceBuilder.build(DynamicResourceBuilder.java:49)
    at org.primefaces.component.media.MediaRenderer.getMediaSrc(MediaRenderer.java:125)
    at org.primefaces.component.media.MediaRenderer.encodeEnd(MediaRenderer.java:42)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:924)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1863)
    at javax.faces.render.Renderer.encodeChildren(Renderer.java:176)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:894)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:443)
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)

    ReplyDelete
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