If the lib is not supported by app engine you will need to deploy into
another server, for example a Tomcat.
On 30 jul, 19:24, RhinestoneMaster <guruko...@gmail.com> wrote:
> We're trying to convert a pdf to an image using a software called
> JPedal. This software is in an external jar. Our development
> environment is in eclipse.
>
> If we include the BufferedImage class in our code, we get this
> compiler error:
> java.awt.image.BufferedImage is not supported by Google App Engine's
> Java runtime environment.
>
> Also, after adding the JPedal jars to the eclipse library our code
> looks like this:
> String url="C:/2007NissanTowingGuide.pdf";
> /**instance of PdfDecoder to convert PDF into
> image From JPedal*/
> PdfDecoder decode_pdf = new PdfDecoder(true);
>
> /**set mappings for non-embedded fonts to
> use*/
> PdfDecoder.setFontReplacements(decode_pdf);
>
> /**open the PDF file - can also be a URL or a
> byte array*/
> try {
> decode_pdf.openPdfFile(url);
>
> /**get page 1 as an image*/
> //page range if you want to extract
> all pages with a loop
> //int start = 1, end =
> decode_pdf.getPageCount();
> //BufferedImage
> img=decode_pdf.getPageAsImage(1);
>
> /**close the pdf file*/
> decode_pdf.closePdfFile();
>
> //RenderedImage rendImage = img;
>
> // Save as JPEG
> File file = new File("yimage.jpg");
> //ImageIO.write(rendImage, "jpg",
> file);
> System.out.println("It worked");
>
> } catch (PdfException e) {
> e.printStackTrace();
> }
> and we get the following exception:
> java.lang.NoClassDefFoundError: org/jpedal/exception/PdfException
> at java.lang.Class.getDeclaredConstructors0(Native Method)
> at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
> at java.lang.Class.getConstructor0(Unknown Source)
> at java.lang.Class.newInstance0(Unknown Source)
> at java.lang.Class.newInstance(Unknown Source)
> at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
> at
> org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:
> 428)
> at
> org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:
> 339)
> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> 487)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1166)
> at
> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
> 51)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
> 43)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at
> com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
> 122)
> at org.mortbay.jetty.servlet.ServletHandler
> $CachedChain.doFilter(ServletHandler.java:1157)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
> 388)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
> 216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
> 182)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
> 765)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
> 418)
> at
> com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
> 70)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> 152)
> at com.google.appengine.tools.development.JettyContainerService
> $ApiProxyHandler.handle(JettyContainerService.java:349)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> 152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
> 542)
> at org.mortbay.jetty.HttpConnection
> $RequestHandler.content(HttpConnection.java:938)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
> 409)
> at org.mortbay.thread.QueuedThreadPool
> $PoolThread.run(QueuedThreadPool.java:582)
> Caused by: java.lang.ClassNotFoundException:
> org.jpedal.exception.PdfException
> at java.net.URLClassLoader$1.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(Unknown Source)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at
> com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:
> 151)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> ... 33 more
>
> Is there any way to resolve these errors or is there gwt-compatible
> way to convert PDFs to images?
>
> Thanks a lot!
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