Displaying PDF in UI

Flow
1

I want to display PDF in my UI and got the following error:

com.vaadin.event.ListenerMethod$MethodException
Cause: java.lang.AbstractMethodError: eu.livotov.tpt.gui.vdv.core.SinglePageDocumentRenderer.generateCell(Lcom/vaadin/ui/Table;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
	at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:532)
	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
	at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1219)
	at com.vaadin.ui.Button.fireClick(Button.java:550)
	at com.vaadin.ui.Button.changeVariables(Button.java:217)
	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.changeVariables(AbstractCommunicationManager.java:1445)
	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1393)
	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1312)
	at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:763)
	at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)
	at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:538)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:517)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:937)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:871)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)
	at org.eclipse.jetty.server.Server.handle(Server.java:346)
	at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:589)
	at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:1065)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:823)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:220)
	at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:411)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:531)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:529)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.AbstractMethodError: eu.livotov.tpt.gui.vdv.core.SinglePageDocumentRenderer.generateCell(Lcom/vaadin/ui/Table;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
	at com.vaadin.ui.Table.getVisibleCellsNoCache(Table.java:1691)
	at com.vaadin.ui.Table.refreshRenderedCells(Table.java:1479)
	at com.vaadin.ui.Table.attach(Table.java:3341)
	at com.vaadin.ui.AbstractComponentContainer.attach(AbstractComponentContainer.java:97)
	at com.vaadin.ui.AbstractComponentContainer.attach(AbstractComponentContainer.java:97)
	at com.vaadin.ui.AbstractComponentContainer.attach(AbstractComponentContainer.java:97)
	at com.vaadin.ui.AbstractComponentContainer.attach(AbstractComponentContainer.java:97)
	at com.vaadin.ui.AbstractComponent.setParent(AbstractComponent.java:560)
	at com.vaadin.ui.AbstractComponentContainer.addComponent(AbstractComponentContainer.java:211)
	at com.vaadin.ui.TabSheet.addTab(TabSheet.java:294)
	at com.vaadin.ui.TabSheet.addTab(TabSheet.java:332)
	at com.vaadin.ui.TabSheet.addTab(TabSheet.java:311)
	at com.complete.raspberry.webui.FileAdminView$SearchFormLayout$2.buttonClick(FileAdminView.java:166)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:512)
	... 32 more

My code is like this:

Button advanceSearchButton = new Button("Advance Search",
   new Button.ClickListener() {
    public void buttonClick(ClickEvent event) {

     DocumentViewer viewer = new DocumentViewer();
     viewer.loadDocument ( new PdfDocument ( new java.io.File ( "C:/handbook.pdf" ) ) );
     System.out.println("Pages pdf : " + viewer.getPagesCount());                           
     VerticalLayout myTabCoursPDF = new VerticalLayout();
     myTabCoursPDF.addComponent(viewer);  
     tabsheet.addTab(myTabCoursPDF);

I’ve also included the following JARs in my project:

icepdf-core.jar
icepdf-pro.jar
icepdf-pro-intl.jar
tpt-core.jar

Now what is the problem in my code… Can anyone plzz help me…

2

Well you are getting an AbstractMethodError, what means you are calling an abstract method without implementing it. I guess your usage of the PDFViewer is probably wrong, but I can’t help there as I don’t know that particular library.

3

As far as I know, ICEpdf Viewer is a swing viewer and you can not use it with vaadin which is browser based.
In browser based applications, you do not need a PDF viewer because the browser may be directly supporting PDF viewing (example: Chrome) or you can configure a PDF viewer plug-in.
In your example, you are trying to show a PDF file that was already available on your harddisk and you don’t need any PDF-specific library for that. Just use the FileResource to download it to the client.

4

As an addition: For display you can use the Embedded-Component with TYPE_BROWSER set.

5

thnx to all and now i want to restrict PDF printing in vaadin to some users… How can i do that??

6

You will have to encrypt the PDF using your PDF-generation-tool (iText or Adobe Pro). Otherwise it will always be possible to print and / or save the PDF.

7

is this possible with document viewer??

8

is this possible to show pdf from hard disk with tpt Document Viewer??