I'm trying to do OCR on PDFs using tess4j, which is working perfectly when I use a JUnit test to 'read' the PDF, but not when I run it using Primefaces FileUpload.
The listener calls the OCR class which does exactly the same as the JUnit test, except returning the string of the OCR-result. This is the java class:
import java.io.File;
import net.sourceforge.tess4j.Tesseract;
public class PDFToText
{
public String doOCR(){
try
{
Tesseract tess = new Tesseract();
String text = "";
imagePath = new File("D:/path/to/my.pdf");
tess.setDatapath("D:/path/to/my/tessdata");
text = tess.doOCR(imagePath);
System.out.println(text);
return text;
} catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
I read all those solutions here on SO, concerning JNA Version conflicts with com.sun.jna 3.0.9, etc.
But the never version (3.4.0) of tess4j, which I'm using, does not even include com.sun.java 3.9.0 anymore, it uses net.java.dev 4.1.0 Based on usages on the maven repository and also the source code inside the jar it looks like it's having the RESOURCE_PREFIX attribute.
Also did what @S.Isurika said here, which didn't help: Tess4j in glassfish ERROR:java.lang.NoSuchFieldError: RESOURCE_PREFIX , and anyway I don't want to place some jars in any directory as I'm working with maven (maven for eclipse).
I'm also using Selenium for my project, whose maven configuration depends on net.java.dev.jna version 3.4.0, but that doesn't look like a problem, cause it neither is missing RESOURCE_PREFIX in the Platform file.
First it seemed like a caching problem for me, but after I cleaned the project, cleaned maven, rebuilt maven's indexes, deleted my .m2 folder, deleted the deployment on GL, restarted eclipse and even the machine, I'm lost.
Thanks for your help!
Environment:
- tess4j 3.4.0 (uses net.java.dev.jna 4.1.0.)
- jai-imageio-core 1.3.1
- java 1.8
- maven-compiler-plugin 2.3.2
- maven-war-plugin 2.3
- Glassfish 4.0
- Primefaces 6
- Windows 7
- myEclipse 2017
Here's my stacktrace:
Exception message:
/templates/pages/secured/menu/page.xhtml @121,31 fileUploadListener="#{myBean.handleFiles}": java.lang.NoSuchFieldError: RESOURCE_PREFIX
Exception String:
javax.faces.FacesException:
/templates/pages/secured/menu/page.xhtml @121,31 fileUploadListener="#{myBean.handleAttachmentFiles}": java.lang.NoSuchFieldError: RESOURCE_PREFIX
Exception Cause:
javax.el.ELException: /templates/pages/secured/menu/page.xhtml @121,31 fileUploadListener="#{mybean.handleAttachmentFiles}": java.lang.NoSuchFieldError: RESOURCE_PREFIX
Exception Class name:
javax.faces.FacesException
Stack trace:
javax.faces.FacesException: /templates/pages/secured/menu/page.xhtml @121,31
fileUploadListener="#{mybean.handleAttachmentFiles}": java.lang.NoSuchFieldError: RESOURCE_PREFIX
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:86)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AmeractIOStrategy.fireIOEvent(AmeractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AmeractThreadPool$Worker.doWork(AmeractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AmeractThreadPool$Worker.run(AmeractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:745) Caused by: javax.el.ELException: /templates/pages/secured/menu/page.xhtml @121,31 fileUploadListener="#{mybean.handleAttachmentFiles}": java.lang.NoSuchFieldError: RESOURCE_PREFIX
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:111)
at org.primefaces.component.fileupload.FileUpload.broadcast(FileUpload.java:319)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:755)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:931)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78) ... 30 more Caused by: java.lang.NoSuchFieldError: RESOURCE_PREFIX
at net.sourceforge.tess4j.util.LoadLibs.<clinit>(LoadLibs.java:63)
at net.sourceforge.tess4j.util.PdfUtilities.<clinit>(PdfUtilities.java:214)
at net.sourceforge.tess4j.util.ImageIOHelper.getIIOImageList(ImageIOHelper.java:392)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:212)
at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:196)
at com.me.utils.file.OCR.PDFToText.doOCR(PDFToText.java:121)
at com.me.proj.webLayer.requestScoped.mybean.handleAttachmentFiles(mybean.java:380)
at com.me.proj.webLayer.requestScoped.mybean$Proxy$_$$_WeldClientProxy.handleAttachmentFiles(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.el.parser.AstValue.invoke(AstValue.java:275)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) ... 34 more
