AutoEnhancer classpath, or classloader issue. Fails validation. about gwt-eclipse-plugin HOT 7 CLOSED

!MESSAGE GAE SDK /Users/branflake2267/.m2/repository/com/google/appengine/appengine-api-1.0-sdk/1.9.18/appengine-api-1.0-sdk-1.9.18.jar failed validation
!STACK 1
org.eclipse.core.runtime.CoreException: SDK location '/Users/branflake2267/.m2/repository/com/google/appengine/appengine-api-1.0-sdk/1.9.18/appengine-api-1.0-sdk-1.9.18.jar' is not a directory
    at com.google.appengine.eclipse.core.sdk.AppEngineBridgeFactory.getAppEngineBridge(AppEngineBridgeFactory.java:73)
    at com.google.appengine.eclipse.core.sdk.GaeSdk.getAppEngineBridge(GaeSdk.java:326)
    at com.google.appengine.eclipse.core.sdk.GaeSdk.validate(GaeSdk.java:494)
    at com.google.appengine.eclipse.core.orm.enhancement.AutoEnhancer.hasValidSdk(AutoEnhancer.java:209)
    at com.google.appengine.eclipse.core.orm.enhancement.AutoEnhancer.build(AutoEnhancer.java:126)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:206)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:246)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:299)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:302)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:358)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:381)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

@Override
    public IPath getInstallationPath() {
      try {
        IPath fragmentRootPath = null;
        IPath installPath = null;
        // Check for a type that lives appengine-api-*.jar
        IType gaeMarkerType = javaProject.findType(GAE_MARKER_TYPE);
        if (gaeMarkerType != null) {
          IPackageFragmentRoot packageFragmentRoot =
              (IPackageFragmentRoot) gaeMarkerType.getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT);
          fragmentRootPath = packageFragmentRoot.getPath();

          // Used for maven path, this may not be the best method (might be considered to be a workaround)
          // See: GaeSdkInstaller.mavenRepositorySdkPath(...)
          if (fragmentRootPath.segmentCount() > 3 && MavenUtils.hasMavenNature(javaProject.getProject())) {
            String version = fragmentRootPath.removeLastSegments(1).removeFirstSegments(fragmentRootPath.segments().length - 2).toPortableString();
            String sdkPath = String.format("appengine-java-sdk/%s/appengine-java-sdk/appengine-java-sdk-%s", version, version); // from GaeSdkInstaller
            installPath = fragmentRootPath.removeLastSegments(3).addTrailingSeparator().append(sdkPath);

            System.out.println("~~~~ installPath=" + installPath);
          } else if (fragmentRootPath.segmentCount() > 1
              && (fragmentRootPath.removeLastSegments(1).addTrailingSeparator().toPortableString()
                  .endsWith(SDK_LIB_USER_DIR_PORTABLE_SUBPATH) || fragmentRootPath
                  .removeLastSegments(1).addTrailingSeparator().toPortableString()
                  .endsWith(SDK_LIB_IMPL_DIR_PORTABLE_SUBPATH))) {
            // Should live in SDK_ROOT/lib/user or SDK_ROOT/lib/impl
            installPath = fragmentRootPath.removeLastSegments(3);
          }
        } else {
          // Check for a type that lives in appengine-tools-api.jar
          gaeMarkerType = javaProject.findType(GAE_TOOLS_MARKER_TYPE);
          if (gaeMarkerType != null) {
            IPackageFragmentRoot packageFragmentRoot =
                (IPackageFragmentRoot) gaeMarkerType
                    .getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT);
            fragmentRootPath = packageFragmentRoot.getPath();
            if (fragmentRootPath.segmentCount() > 1
                && fragmentRootPath.removeLastSegments(1).addTrailingSeparator().toPortableString()
                    .endsWith(SDK_LIB_DIR_PORTABLE_SUBPATH)) {
              // Should live in SDK_ROOT/lib
              installPath = fragmentRootPath.removeLastSegments(2);
            }
          }
        }

        if (installPath != null) {
          return installPath;
        }

        return fragmentRootPath;
      } catch (JavaModelException e) {
        AppEngineCorePluginLog.logError(e);
      }

      return null;
    }

 @Override
  public IStatus runInWorkspace(IProgressMonitor monitor) throws CoreException {

    List<String> classpath = buildClasspath(javaProject);

    // Workaround, when using maven project, the tools api jar isn't in rumtime classpath
    if (sdk != null && MavenUtils.hasMavenNature(javaProject.getProject())) {
      IPath toolApiJarPath = sdk.getInstallationPath().append(GaeSdk.APPENGINE_TOOLS_API_JAR_PATH);
      classpath.add(toolApiJarPath.toPortableString());
    }