URISyntaxException while using GlassFish JPA provider in WebLogic

Question

I am trying to plug in GlassFish JPA provider https://glassfish.dev.java.net/javaee5/persistence/#Java_Persistence_API in WebLogic Application Server version "EJB 3.0 Tech Preview". EJB 3 tech preview version is only available on Windows OS, so I am using Windows OS.
1. I have made GlassFish provider jar file (toplink-essentials.jar) available to WebLogic server class loader.
2. I modified the EJB 3.0 sample (reviewService.ear) to use GlassFish provider <i>oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider</i> in persistence.xml file.
3. I changed the build.xml so that I don't package Kodo enhanced classes in the ear file.
Now when I deploy the application, I am getting URISyntaxException thrown by GlassFish provider. The URL printed in the exception message <i>jar:file:D:\sahoo\software\bea\weblogic_ejb30_preview\samples\domains\wl_server\.\servers\examplesServer\tmp\_WL_user\reviewService\prxy3a\domain.jar!/</i> is containing <b>'\'</b> instead of <b>'/'</b>. This looks like a bug in the WebLogic server. Can anyone confirm this?
Exception Stack:
Target state: deploy failed on Server examplesServer
java.net.URISyntaxException: Illegal character in opaque part at index 11: jar:file:D:\sahoo\software\bea\weblogic_ejb30_preview\samples\domains\wl_server\.\servers\examplesServer\tmp\_WL_user\reviewService\prxy3a\domain.jar!/
at java.net.URI$Parser.fail(URI.java:2809)
at java.net.URI$Parser.checkChars(URI.java:2982)
at java.net.URI$Parser.parse(URI.java:3019)
at java.net.URI.<init>(URI.java:578)
at java.net.URL.toURI(URL.java:916)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.convertURLToURI(PersistenceUnitProcessor.java:625)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.createInputStreamForFileInPersistenceUnit(PersistenceUnitProcessor.java:200)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.populateORMXMLStreamList(EntityManagerSetupImpl.java:664)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.buildPersistentClassSetFromXMLDocuments(EntityManagerSetupImpl.java:124)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.buildEntityList(EntityManagerSetupImpl.java:162)
at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:492)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createContainerEntityManagerFactory(EntityManagerFactoryProvider.java:154)
at weblogic.deployment.PersistenceUnitInfoImpl.createEntityManagerFactory(PersistenceUnitInfoImpl.java:140)
at weblogic.deployment.PersistenceUnitInfoImpl.<init>(PersistenceUnitInfoImpl.java:84)
at weblogic.deployment.AbstractPersistenceUnitRegistry.loadPersistenceDescriptor(AbstractPersistenceUnitRegistry.java:43)
at weblogic.deployment.ModulePersistenceUnitRegistry.<init>(ModulePersistenceUnitRegistry.java:67)
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:320)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
Thanks,
Sahoo

Answer 1

The processing steps
<OL>
<LI>1. URL passed by the container is converted by the provider to an URI.
<LI>2. The provider is passing this URI to a java.io.File(URI uri) constructor.
</OL>
<OL>
<LI>Problem 1: The container is not replacing the backslash to forward slash.
<LI>Problem 2: Even when the container replaces the backslashes, the provider fails at the File(URI uri) constructor. Because it needs to construct the file with
not the actual URI, but URI.getSchemeSpecificPart().
</OL>
<BR>
One possible solution lies for the provider (without modifying the container) is to start with the URL, convert it to URL after replacing the backslashes and then passing only the scheme specific part to construct a file.
Please see the attached simple Java code
<pre>package test;
import java.io.File;
import java.net.URI;
import java.net.URL;
* @author <A HREF="mailto:[email protected]>Pinaki Poddar</A>
public class TestPath
      * @param args
     public static void main (String[ args) throws Exception
//          String url = "jar:file://D:/TP5/weblogic_ejb30_preview/samples/domains/wl_server/./servers/examplesServer/tmp/_WL_user/ejax/ie9te7/ejax.jar!/";
//          String url = "jar:file:D:\\TP5\\weblogic_ejb30_preview\\samples\\domains\\wl_server\\.\\servers\\examplesServer\\tmp\\_WL_user\\ejax\\ie9te7\\ejax.jar!/";
          String url = "jar:file:D:\\TP5\\weblogic_ejb30_preview\\samples\\domains\\wl_server\\.\\servers\\examplesServer\\tmp\\_WL_user\\ejax\\ie9te7\\ejax.jar!/";
          URL URL = validateURL(url);
          System.out.println("URL = " + URL);
          System.out.println("URL.protocol = " + URL.getProtocol());
          System.out.println("URL.file = " + URL.getFile());
          URI URI = URL.toURI();
          System.out.println("URI = " + URI);
          System.out.println("Scheme =" + URI.getScheme());
          System.out.println("Authority =" + URI.getAuthority());
          System.out.println("Host =" + URI.getHost());
          System.out.println("Port =" + URI.getPort());
          System.out.println("SchemePart: " + URI.getRawSchemeSpecificPart());
          System.out.println("Path: " + URI.getPath());
          System.out.println("Fragment: " + URI.getFragment());
          System.out.println("Absolute = " + URI.isAbsolute());
          System.out.println("Opaque = " + URI.isOpaque());
          File file = new File(URI.getSchemeSpecificPart());
          System.out.println("File [" + URI + "] exists = " + file.exists());
     static URL validateURL(String url) throws Exception {
          url = url.replace('\\','/');
          URL URL = new URL(url);
          String fileName = URL.getFile();
          if (fileName.startsWith("file:") && !fileName.startsWith("file://"))
               URL = new URL(URL.getProtocol(),URL.getHost(),URL.getPort(),
                         "file://"+fileName.substring(5));
          return URL;
</pre>